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Brodarič, Petar, Donald Schiozzi i Željko Smojver. "Analysis of River Cruising with the main focus on Croatia". Journal of Maritime & Transportation Science 53, nr 1 (lipiec 2017): 11–18. http://dx.doi.org/10.18048/5301.
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The topic of this paper concerns the analysis of river cruising in Europe and Croatia in order to explain problems affecting this kind of tourist product. There are a lot of possibilities to use rivers to complete the whole tourist experience, which is a top priority for the Croatian budget. This paper analyzes the current state of river cruising in Croatia, the types of ships used, the different types of users, the main reason for the poor state of river cruising in Croatia, and possible solutions Croatia can introduce in order to revitalize river cruising.
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Barus, Ternala Alexander. "Diversity of Fish in Idanoi River and It’s Relationship to Physical Factors of Water Chemistry". International Journal of Ecophysiology 3, nr 1 (21.10.2022): 76–95. http://dx.doi.org/10.32734/ijoep.v3i1.10024.
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A river is an area through which a body of water moves from a high place to a low place either through the surface or underground which has an average width equal to or more than 5 meters. One of the rivers in Indonesia is the Idanoi river, located in the North Sumatra region, Ononamolo 1 Lot village, Gunungsitoli Selatan sub-district, Nias. This river is inseparable from human activities which affects the condition of river waters as a habitat for aquatic biota. The purpose of this study was to analyze the diversity of fish species in the river Idanoi and to analyze the physical-chemical factors of waters which correlate with the diversity of fish species in the river Idanoi. This study uses the Random sampling method. The results of the research obtained from the four research stations found 1 class, 5 orders, 7 families and 7 species. The highest density value was found at station 1 with a value of 0.023 ind / m2, fish diversity index ranged from 1.072 - 1.829 and the fish uniformity index ranged from 0.92 to 0.98. DO, BOD5 values and oxygen saturation correlated very strongly with fish diversity in river Idanoi village Ononamolo 1 Lot.
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Kankan Parmikanti, Kankan, Khafsah Joebaedi i Iin Irianingsih. "MODEL STAR DENGAN BOBOT SERAGAM SEBAGAI PENDETEKSI DEBIT AIR SUNGAI CITARUM". Jurnal Ilmiah Matematika dan Pendidikan Matematika 8, nr 2 (30.12.2016): 81. http://dx.doi.org/10.20884/1.jmp.2016.8.2.2891.
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Lately when rainfall in West Java is quite high, the problem of flooding caused by overflowing of the river has always been a trending topic of regional leaders. Whatever the causes of flooding, be it because a lot of waste dumped in rivers or due to illegal logging of trees in the forest, the river water discharge increased rapidly, and overflowed into public housing. Based on the above, it should be made a model that can predict the water discharge of the river from time to time in various locations in West Java. In this paper will be presented studies Space Time Auto Regression models STAR (1,1) to model the problem of water discharge some rivers in West Java, which can be useful for predicting the discharge of river water in the future. By using Least Squares Method as predictors for the parameters, as well as assuming a uniform weighting matrix, the result that the water discharge of a river in addition affected by the river water flow at an earlier time, it is also influenced by the discharge of river water around.
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Wang, Liu Yan, You Peng Xu i Ming Jing Yu. "River System Connectivity Analysis of Wuxi’s Central Urban Area Based on Graph Theory". Applied Mechanics and Materials 212-213 (październik 2012): 543–48. http://dx.doi.org/10.4028/www.scientific.net/amm.212-213.543.
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Wuxi City is located in the hinterland of Taihu Basin and an important city in Yangtze River Delta Region with a prosperous economy. In the process of urban development, the river system pattern changes a lot. It has an impact on water environment, water ecology and other fields. The central urban area of Wuxi City was selected as the study area. Based on the river system of three periods: 1960s, 1980s and 2009, the rivers were classified into three levels according to the width of channels. The length, acreage and stream structure parameters were calculated. Then from the view of Graph Theory, river system was expressed as network graph, and the vertices, edges and degree of vertices were analyzed. The results show that the changes of rivers of different levels and lakes are not completely the same, but still appear a decreasing trend in general. The river network density and water surface ratio become smaller. Also the complexity and structure stability of river network weaken. The conclusions that the river evolution tends to be trunk and single, the stream structure is simplified and the connectivity of rivers and lakes reduces are verified by the analysis based on Graph Theory as well.
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Thebault, Jean-Marc, i Azddine Qotbi. "A model of phytoplankton development in the Lot River (France)." Water Research 33, nr 4 (marzec 1999): 1065–79. http://dx.doi.org/10.1016/s0043-1354(98)00284-x.
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Aina, Nuruk, Emmy Sri Mahreda, Kissinger Kissinger i Hamdani Fauzi. "ANALISIS PARTISIPASI MASYARAKAT SEMPADAN SUNGAI TAPIN DI KABUPATEN TAPIN TERHADAP KELESTARIAN LINGKUNGA". Jurnal Hutan Tropis 9, nr 2 (5.08.2021): 321. http://dx.doi.org/10.20527/jht.v9i2.11280.
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The degradation of culture and people's lives leads to the degradation of rivers and water. An alarming condition regarding the declining quality of the river's ecology, which has occurred in many places. A lot of garbage is found in the river, the width of the river is getting shorter because on the river border many people's houses are built on the river, sand mining activities in the river erode the depth of the river so that it has an impact on the quality of river water, fish farming activities and so on. That phenomenon lead to decreasing quality of rivers. The purpose of writing this research is to analyze community participation in the river border towards the environmental sustainability of the Tapin river in Tapin Regency, South Kalimantan. This study used a mixed research method that combines quantitative and qualitative approaches with data collection techniques through interviews with informants, direct observations in the field and distributing questionnaires to respondents. The results showed that the value of community participation on participation in the Tapin River conservation effort was 70.825%, which means that it was included in the participation level of 62.50% - 81.24% declared "participating". However, if viewed from the results of the interviews contained in the questionnaire, it was stated that only 30% participated while 70% of the community admitted that they had never participated in efforts to maintain and preserve the Tapin River.
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EM, Denise, Kadiri MO, Uduak EA i Iniekpo VE. "Autecology of microalgae in Nsit Ubium river". MOJ Biology and Medicine 8, nr 2 (29.06.2023): 93–98. http://dx.doi.org/10.15406/mojbm.2023.08.00191.
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Analysis of water such as river and lakes can provide an insight into their composition and potential impact on the environment. Nsit Ubium River is a fresh water body that flows through urban areas in Akwa Ibom state. The locals attached a lot of socio-economic importance to the river, as a result of this a lot of humans generated pollutants find their way into it. Researching on the autecology of microalgae in the river, water and algae sample were collected from the river for the period of four months (October 2021 to January 2022) and analyzed for physiochemical parameters and species diversity using standard procedures. Water samples were collected using 1 litre transparent bottle while microalgae samples were collected by scrapping the attached plants on the river bank into a transparent bottle and preserved with a drop of a mixture of formaldehyde and lugol iodine. pH ranged between (4.1 and 5.8), conductivity between (15 and 153), alkalinity between (5.0 and 5.8), Nitrate between (0.5 and 0.80Mg/L), phosphate between (5.01 and 7.8Mg/L) and dissolve oxygen between (6.27 and 9.22mg/l) were determined. Five divisions of algae comprising of 92 taxa were identified during this study. The division, Bacillariophyta was the most represented division accounting for 80% occurrence and a total of 72 species, this was followed by Chlorophyta with 10%, Euglenophyta (7%), Cyanophyta (2%) which were accounted for 9, 6 and 2 taxa respectively. Dinophyta was the least represented with (1%) and contributed only one taxon. The month of November has the highest number of species with total of 54 taxa while December has the least occurrence (31 taxa). The composition of microalgae in Nsit Ubium River were dominated by diatoms (Bacillariophyta) which are good pollution bio-indicators. The Cyanophyta indicates higher nutrient enrichment which could have been due to runoff from agricultural land or waste water discharge. Therefore, the documented algae in the river could be usedful as a pollutant indicator in assessing pollution status of rivers.
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Mahmudah, Muhlisatul. "Minimizing The Development of Lake at River Meeting Points to Reduce Floods in Jakarta Using the Dominating Set Application". Jurnal Axioma : Jurnal Matematika dan Pembelajaran 4, nr 1 (31.01.2019): 27–32. http://dx.doi.org/10.36835/axi.v4i1.341.
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One of the theories developed in graph theory is the dominating set. Dominating set is a concept of determining the minimum point on the graph with the provision of a point as dominating set to reach the point that is around it. The smallest cardinality of the dominating set is called the domination number denoted by (G). Given graph G with point V and E side, let D be a subset of V. If each point of VD is adjacent at least one point from D, then D is said dominating set in graph G. Currently a lot of applications from dominating set, one of which is Minimizing the Construction of Lakes at River Meeting Points to Reduce Floods in Jakarta. In this study a river meeting will be rebuilt to select floods in Jakarta. Flooding is a natural disaster which is currently often in Indonesia. Especially in Jakarta. Jakarta is one of the risk areas for flooding in Indonesia and floods that always occur suddenly There are so many ways to reduce them, but that doesn't work. One of the causes of flooding in Jakarta is the overflow of river air. When a patient appears suddenly several rivers that have large currents, air flow will collide at the meeting point. When the river flows, the air will overflow large enough. Therefore, it is important to develop a lake at the river meeting point but it is necessary to make the lake as minimal as possible and also to be efficient. The research application dominates the set of lake developments in each river meeting point in the city. Keywords: dominating set, river, flood
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Qiu, Liang, i Hong Juan Zhai. "An Ecological Compensation Mechanism of Chishui River Water Resources Protection and Research". Applied Mechanics and Materials 685 (październik 2014): 463–67. http://dx.doi.org/10.4028/www.scientific.net/amm.685.463.
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Chishui River, a first-order south tributary of upper Yangtze River, extends cross Sichuan, Yunnan and Guizhou provinces and is famous as the “eco-river with a lot of endemic fishes”, “Beauty River with natural scenic landscapes”, “Chinese famous liquors river with Maotai” and “hero river”. According to the existing problems in Ecological Environment of the Chishui River, the ecological compensation mechanism was established and the compensation of the main watershed ecology, ecological compensation object, ecological compensation standards and ecological compensation ways were determined, for protecting the environment requirements of the rare and unique fish and Liquor industry production of Yangtze River.
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Krawczyk, Rafał. "Small-scale spatial analysis of river corridor plants distribution in the San River valley (SE Poland)". Biodiversity Research and Conservation 34, nr 1 (1.06.2014): 53–64. http://dx.doi.org/10.2478/biorc-2014-0007.
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Abstract Spatial distribution and habitat preferences of 55 river corridor plant species were analyzed on a local scale in the valley of a medium-size regulated river. The analysis was based on the results of a detailed mapping on a 50 km-long section of the Lower San River valley (366 cartogram cells of 1 square km). Selected species were divided into two groups: (1) strictly and (2) loosely confined to river corridors. River corridor plants were found throughout the valley (river channel, active and historical floodplain, older terraces, slopes); however, their frequency was diverse in particular areas. The highest concentrations were observed on the floodplain. Their number decreased towards the border areas of the valley. Species which were less confined to rivers were found more frequently in the valley (one species occupied, on average, 12.9% of grid cells), than plants strictly confined to the river system (one species occupied, on average, 5.9% of grid cells); however, the ranges of species of the second group were more restricted to the Holocene part of the valley, especially to the floodplain. River corridor plants were, ecologically, a highly diversified group. In the San river valley, they were found in riparian forests, pioneer ephemeral communities on the banks of water bodies, dry grasslands, meadows and old river beds; a lot of them grew in ruderal habitats.
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Solijonov, Khayrulla, i Farrukh U. Umarov. "ECOLOGY OF LEECHES AND GASTROPODS OF THE LOWER AK-BUURA RIVER, FERGANA VALLEY, UZBEKISTAN". Bulletin of the Iraq Natural History Museum 17, nr 2 (20.12.2022): 229–50. http://dx.doi.org/10.26842/binhm.7.2022.17.2.0229.
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This study was conducted on species composition, morphology, ecological characteristics, biotope distribution, ecological groups, biodiversity indicators and zoogeography of leeches and gastropods distributed in the lower Ak-Buura River. According to the results, it was found that 7 species of leeches belonging to 4 families and 6 genera and 10 species of fresh-water gastropods belonging to 3 families and 6 genera live in the lower Ak-Buura River. In the river, it was observed that leeches are mainly distributed in muddy biotopes, and gastropods are widespread in muddy, stony and sandy biotopes with a lot of plants. Biodiversity indices of leeches and gastropods in the Ak-Buura River were analyzed using the Shannon index. As a result, it was determined that the biodiversity index of the Ak-Buura river is lower than other rivers in the Fergana valley (H' = 0.81-1.17). This is mainly due to the eutrophication of some parts of the river and the instability of the water hydro-regime. Most of the leeches distributed in the river are carnivores, and gastropods are phytophages. According to the zoogeographical analysis, it was found that leeches are Holarctic, Palearctic, Western Palearctic, and gastropods are composed of European-Siberian, Palearctic and Central Asian species.
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Yendri, Okma. "Effect of Water on Flow Fluctuation in River Flow". Journal of Integrated and Advanced Engineering (JIAE) 2, nr 1 (10.03.2022): 1–10. http://dx.doi.org/10.51662/jiae.v2i1.23.
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River water fluctuations affect the amount of inundation that occurs. The study aims to obtain a cross-section of the river channel to drain runoff water so that the runoff due to maximum rainfall does not cause puddles. The Ketupak river flow cannot drain flow during the rainy season. Besides that, there is also a lot of sediment, garbage, stems and branches that interfere with the Ketupak river flow. Therefore, it is necessary to rearrange the river channel. From the results of calculations based on rainfall data, it is necessary to increase the cross-sectional area of the river.
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Meng, Zhen Zhu, De Shan Tang, Yu Hang Wei i Yi Fan Ding. "Improve Urban River Water Quality by Integrating Water Resource Management into Urban Construction". Advanced Materials Research 1077 (grudzień 2014): 276–80. http://dx.doi.org/10.4028/www.scientific.net/amr.1077.276.
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Increasing population and urbanization pose more and more threats to urban river. Integrated Water Resources Management (IWRM) is possible framework to solve water resource management problems through cross-sectional cooperation, but the vagueness in this concept make its application difficult. This paper focuses on urban river management practices in China and classified the government-guided cross-sectional urban river management projects to a special pattern of IWRM (GIWRM). It is proved to be effective in synthesizing efforts of different government departments, industry and the public and improve the urban river conditions a lot.
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Boutsougame, A., M. Khaffou, H. Aassine, H. Ouazzani i M. Alaoui. "Environmental Impact Assessment of the quarries on Grou River: Khenifra region- Morocco". IOP Conference Series: Earth and Environmental Science 1090, nr 1 (1.10.2022): 012018. http://dx.doi.org/10.1088/1755-1315/1090/1/012018.
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Abstract Khenifra region is rich in geological resources, which attracted a lot of investment, especially the quarrying. The Grou River watershed contains a lot of quarries of alluvial material extraction which causes negative impacts on its environment such as landscape modification, water quality degradation, dust emission and, soil erosion. The evaluation of water quality by measuring physicochemical parameters showed a deterioration of its quality in the downstream area compared to the upstream area. To respond to this situation, we suggest a set of mitigation measure and propose the respect of monitoring and surveillance plans.
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Sufiyan, Ibrahim, Magaji J.I i Isa Zaharadeed. "SIMULATION OF SEDIMENT YIELD AND SUPPLY ON WATER FLOW IN DIFFERENT SUBBASINS OF TERENGGANU WATERSHED FROM 1973-2017". Water Conservation and Management 4, nr 1 (20.01.2020): 01–06. http://dx.doi.org/10.26480/wcm.01.2020.01.06.
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The catchment area of Terengganu has to be flooding during the monsoon season. The reason is climate change that increases water flow in most of the rivers. The analysis using ArSWAT2012 has simulated the whole watershed and the result as proven to have about 25 different sub-basins. Each sub-basin has its peculiar characteristics of Hydrologic Response Units (HRUs). Base on the morphological classification, the river has accumulated a lot of sediments. The sediment yield and concentration has been analyzed from 1973- 2017 through simulation. The study compared the simulations and found out the slide differences in the sediment loads that come in and the sediment that goes out. The sediment concentration also varies with the temporal morphological changes of the Terengganu watershed especially the river mouth.
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Indrawati, Dian, Mohammad Bagus Adityawan, Diki Maulana Ichsan, Dhemi Harlan i Joko Nugroho. "Analisis Prioritas Penanganan Banjir Kali Konto, Provinsi Jawa Timur". Rekayasa Sipil 16, nr 3 (11.10.2022): 172–81. http://dx.doi.org/10.21776/ub.rekayasasipil.2022.016.03.4.
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Flood in Kali Konto is a disastrous hazard which strikes a lot of housing, infrastructures and paddy fields along its river banks almost every year. In 2021, along with destroyed revertment at roolagh 70 area, flood inundated more than 10 villages in Kabupaten Jombang and several more in Malang and Kediri. However, flood management at Kali Konto needs special consideration because several conditions, include watershed area pattern, extremely slope condition changing, numerous materials from Kelud mountain eruption in several part of Konto river, and a lot of infrastructures which laid in Konto river. This paper discussed about appropriate infrastructures which derived from hydrology and hydraulics modeling for Q2 and Q50 flood return periods. Since the model resulted 49 locations, Analytical Hierarchy Process (AHP) model used for determining priority for scaling down flood hazard in Kali Konto. The most priority comes to Karang Tengah, Blaru and Bugasur Kedaleman area based on the most losses occurred.
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Gu, Jung-Eun, Sang Hwa Jung, Joongu Kang i Hyoseop Woo. "Analysis for Underwater Sound on Natural River Habitat". E3S Web of Conferences 40 (2018): 02047. http://dx.doi.org/10.1051/e3sconf/20184002047.
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A riffle-pool structure is a representative physical structure of bed in rivers. The change in the physical parameter of the habitat could lead to changes in the sound environment of rivers, which are expressed by underwater acoustics. This change in underwater sound affects fish habitat. In this study, the changes of underwater acoustics were analyzed according to the change of pool-riffle sequence in a natural river. And the correlation between underwater acoustics and hydraulic characteristics was investigated. The survey for underwater acoustics was performed in the Namdae stream where is in Gangwon province. This stream belongs to the Han River basin and the river length is 39.01 km and the catchment area is 127.56 km2. The Namdae stream is a river that accounts for more than 70% of salmon returning to South Korea. The spawning salmon will return to this area around November after growing in the Bering Sea. It is important to manage the fish habitat in this river so there is a lot of research on the enhancement of fish habitat. Hydraulic characteristics were changed by the river bed structure. In this study, we investigated the relationship between underwater acoustic characteristics and hydraulic factors such as riverbed material, flow rate and water depth of each habitat type at 12 sites. The characteristics of underwater acoustic differed relative to different hydraulic factors of the two habitats, which is riffle and pool. The sound pressure level of riffles was relatively higher than that of the pools due to bed materials, shallow depth and high water velocity of riffles. In the future, it is considered that the underwater sound can be utilized as a parameter to evaluate the physical habitat environment of the river.
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Dou, Xiping, Xinzhou Zhang, Xiangming Wang i Jinhua Wang. "NUMERICAL SIMULATION STUDY ON DEPOSITION DOWNSTREAM ESTUARINE SLUICE". Coastal Engineering Proceedings 1, nr 33 (18.10.2012): 8. http://dx.doi.org/10.9753/icce.v33.sediment.8.
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In order to resist tides and salt intrusion, there have been more than 300 tidal gates built at many river estuaries in China since 1960s. However, the serious deposition occurred at a lot of gates due to the changes of hydrodynamic and sediment conditions and lack of discharge from the rivers. At present, the research is mainly to analyze the reasons for siltation downstream gates and the measures of dredging. It is not enough for study on distribution simulation of deposition downstream sluice. Studies have shown that 2D numerical model cannot reflect the distribution of sediment siltation downstream gates. Therefore, it needs to develop 3D sediment numerical model for deposition prediction. In this paper, combined the feasibility study of a tidal gate at Mulanxi River, a physical model and 3D numerical model of sediment siltation downstream gate are conducted.
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Jensen, Ric. "Incorporating communication research to develop an environmental history of the Pecos River of Texas". Journal of Science Communication 06, nr 04 (22.10.2007): A02. http://dx.doi.org/10.22323/2.06040202.
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Near the turn of the Century, a woman in her 90s from Dodge City, Kansas was riding her horse near the Pecos River and she described it as a sea of saltgrasses...You had to be very close to the river to see it because the grass was so high You could drink the water out of the springs in this area. I used to ride down to the Pecos River on horseback...There was a lot more water in it back then. We grew cantaloupes...and people were amazed at how sweet they were... We stopped because the water [became] was too salty. In 1903, fresh watercress and ferns were growing at Independence Springs [on the Lower Pecos River]...and there were pools of catfish and silver bass. Residents along Independence Creek sold minnows and other bait fish they took from the river. We had a terrible flood in 1941 and 1942 which breached Zimmerman Dam. The river at some places was 10 miles wide. Floodwater covered the valley and the dam was washed out. It seems there is always less water in the Pecos than we need... I think the water quality is worse now-- not that the Pecos River was ever beautiful and clear. When my grandfather got here 110 years ago, they had a lot of water problems then. The prospect of fixing the saltcedar problem and making this area come back the way it was 100 years ago looks bleak for to me...I don't know if we can do that --Quotes from long-time residents of the Pecos River of Texas
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Kedziorek, Monika A. M., Stephane Geoffriau i Alain C. M. Bourg. "Organic Matter and Modeling Redox Reactions during River Bank Filtration in an Alluvial Aquifer of the Lot River, France". Environmental Science & Technology 42, nr 8 (kwiecień 2008): 2793–98. http://dx.doi.org/10.1021/es702411t.
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Kitamura, Yuichi. "Establishment of the comprehensive river environment conservation system in collaboration with river stakeholders on the Tenryu River". E3S Web of Conferences 346 (2022): 03021. http://dx.doi.org/10.1051/e3sconf/202234603021.
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The sedimentation, turbid water and water quality are typical environmental issues for dams and reservoirs which have impact on the reservoir and downstream of dams. These impacts are influenced from the upstream of a dam, and influence to the downstream. Therefore, a more integrated environmental management approach and consideration have been required for the whole river system. The Tenryu River in Japan flows through the erodible area near the Median Tectonic Line on Honshu, the main island of Japan, and continuously carries a lot of sediment during floods. The “Tenryu River Natural Resources Rebirth Promotion Committee” was established in 2012. The purpose of the committee is to restore fish resources and improve the river environment. The feature of the liaison committee is that it is composed of the Tenryu River fisheries association, academic experts, and dam owner and exchanges knowledge and technology information in spite of each interest. The current activities are related to the theme of “attached algae/environmental DNA survey”, “turbid water measures in reservoir/spawning bed construction technique at downstream,” and “information dissemination”. In this paper, the activities of the comprehensive reservoir and river environment conservation system in collaboration with river stakeholders are introduced and described, including future prospects.
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Nardini, Andrea Gianni Cristoforo, i Giulio Conte. "River Management & Restoration: What River Do We Wish for". Water 13, nr 10 (11.05.2021): 1336. http://dx.doi.org/10.3390/w13101336.
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In this paper we propose a new framework to support river management and restoration in a more effective way, both conceptually and operationally, in view of an increasingly challenging future. ‘Development’ almost inevitably leads to modifications of rivers. These modifications are governed (at best) by planning exercises which typically encompass multiple and generally conflicting objectives (whether explicitly or implicitly). To address the inherent conflictual nature of a decision problem, it is key to measure the degree to which the objectives are (expected to be) met. This requires that suitable evaluation indices are established and assessed. To this purpose, we point out the important role of the Value Function technique inherited from Multicriteria Analysis. One of these objectives is the “Natural value N” of the river. We notice that a lot of ambiguity exists regarding its definition. To clarify this point, we develop a reasoning that makes it possible to structure and assess it in a conceptually sounder way, while clarifying the role of the two leading concepts: the Reference Conditions and the Leitbild. With regard to the relevant decisions involved, the delineation of the fluvial space, together with the improvement of the water quality and hydrological regime, represent the key issues that a decision making process should address, particularly thinking of the expected consequences of climate change. We propose henceforth a pragmatic, structured, adaptive planning framework which harmonizes all such concepts. We believe that this proposal may provide a useful contribution to improve and optimize river management and restoration.
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Audry, S., G. Blanc i J. Schäfer. "Cadmium in the Lot-Garonne River system: Fluxes, predictive model and mass balance". Journal de Physique IV (Proceedings) 107 (maj 2003): 71–74. http://dx.doi.org/10.1051/jp4:20030246.
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Schäfer, J., G. Blanc, S. Audry, D. Cossa i C. Bossy. "Mercury in the Lot–Garonne River system (France): Sources, fluxes and anthropogenic component". Applied Geochemistry 21, nr 3 (marzec 2006): 515–27. http://dx.doi.org/10.1016/j.apgeochem.2005.12.004.
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Wu, Xia, i Yue Bo Xie. "The Field Application of Microbial Technology Used in Bioremediation of Urban Polluted River". Advanced Materials Research 518-523 (maj 2012): 2906–11. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.2906.
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This paper studies on the field application of microbial technology used in bioremediation of urban polluted river. Xuxi River, a heavily polluted urban river, had been maken the treatment as the research object. In this treatment, Xuxi River was directly added indigenous microorganism agent and microbiological accelerating agent into the river water and sediment in the special inoculation way, without artificial aeration and sediment dredging. After this treatment， the removal rates of COD, TP and NH3-N are up to 43%、56% and 58%, DO increases to 2mg/L, the Nemerow index reduces to 2.2 from 6.4, and a lot of water earthworms and a school of fish reappear. The results indicate that this microbial technology can effectively alleviate the pollution, promote the water quality, and restore the river ecosystem.
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Gala, Indri Novayanti, i Shelvy Ferawati Rurua. "Organic pollution level and water quality in Poso river with macroinvertebrate indicators". Edubiotik : Jurnal Pendidikan, Biologi dan Terapan 7, nr 02 (2.11.2022): 205–13. http://dx.doi.org/10.33503/ebio.v7i02.1974.
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The Poso river is one of the rivers in the Poso Regency that is utilized as a water source and channeled to people's homes by the Regional Drinking Water Company. There are also people who take water directly from the river for consumption. However, there is a lot of garbage/waste found on the banks and bodies of the river due to the economic and social activities of the people living along the Poso river. There are several home industries that dispose of their industrial waste directly into the Poso river, causing pollution that affects the water quality of the Poso river. The objective of this study was to analyze the level of organic pollution and water quality in the Poso river with macroinvertebrates as biological indicators. The research samples were all macroinvertebrates found at the time of sampling at each station. Data collection/sampling was conducted at four stations, namely station 1 in residential areas; station 2 at the central market and industrial activity; station 3 in the tofu factory; and station 4 in the estuary area. Data was collected by determining the point for sampling first. The bottom substrate of the Poso river was mud so that macroinvertebrates could only be collected by sweeping techniques. The data analysis technique used was the FBI (Family Biotic Index) formula. The results showed that there were 10 taxa of macroinvertebrate biota families obtained at all research stations with a Family Biotic Index (FBI) value of 6.13. This means that the water quality of the Poso river in the Poso Kota Selatan and Poso Kota Sub-districts is rather poor.
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Yan, Xue, Jinliang Zhang, Yang Li, Yan Zhang i Long Sun. "Reconstruction of Planforms and Architecture of the Meandering Paleo-Channels—A Case Study of the 1st Member of Shanxi Formation, Central of Sulige Gas Field, Ordos Basin". Water 14, nr 3 (5.02.2022): 477. http://dx.doi.org/10.3390/w14030477.
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Although a large number of meandering rivers have been studied by means of modern sedimentation, instrument detection, numerical simulation, flume experiment and field outcrop, and a lot of achievements have been made, there are not many fine anatomical examples of deep buried ancient rivers, which is a situation that still needs to be improved. The main difficulties in the research of deep, ancient meandering rivers are the acquisition of data and the incompleteness of structure, which are both difficulties and challenges. Under the guidance of the modern meandering river fan sedimentary model and migration law, we established the scheme of meandering river geomorphology and structure. In the process of river migration, a variety of single migration models (expansion, contraction, rotation, and translation) and composite migration models can be distinguished. By analyzing the distribution structure characteristics of channel configuration elements in different migration modes, the coupled model of the meandering channel plane and profile structure is established by systematically constructing plane and profile combined with a three-dimensional channel configuration model. Based on the data of the dense well, taking the Shan 11 sublayer in the Su-x block of the Sulige gas field as an example, the reservoir structure of the deep, ancient meandering channel is dissected. In order to reconstruct the evolution of the deep, ancient channel and make it more consistent with the real laws of river migration and evolution, the morphological migration law of the modern river is applied to the ancient sedimentation, and the migration configuration is dissected by combining with the plane-profile structure coupled model. It further reveals the heterogeneity, the vertical distribution and the superposition form of the channel sand, and enriches the theory of the reservoir configuration of underground fluvial facies, all of which are significant for oil and gas exploration and development.
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Gil-Díaz, Teba, Jörg Schäfer, Alexandra Coynel, Cécile Bossy, Lionel Dutruch i Gérard Blanc. "Antimony in the Lot–Garonne river system: a 14-year record of solid–liquid partitioning and fluxes". Environmental Chemistry 15, nr 3 (2018): 121. http://dx.doi.org/10.1071/en17188.
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Environmental contextAntimony is a trace element ubiquitously present in the environment, but data are lacking on its spatio-temporal distribution in aquatic environments. Long-term records serve as essential tools to decipher temporal patterns, historical sources and sinks and background concentrations in an area. We characterise the temporal concentrations, transport and behaviour of antimony in the Garonne River watershed, the main tributary to the Gironde Estuary, the largest estuary in south-west Europe. AbstractKnowledge of the environmental chemistry of antimony (Sb) in aquatic systems is limited, and a better understanding of its geochemical behaviour is needed. Based on a fourteen-year survey (2003–2016) with monthly measurements of dissolved and particulate Sb at five sites in the Lot–Garonne river system, combined with daily measurements of water discharge and suspended particulate matter, this work characterises Sb behaviour in the upstream major river watershed of the Gironde Estuary. The survey provides a first regional geochemical Sb background in the Garonne River watershed for dissolved (~0.2 µg L−1) and Th-normalised particulate Sb (Sbp/Thp ~0.25) concentrations. Observed decreasing temporal trends (<1 ng L−1 in dissolved and <0.02 mg kg−1 in particulate concentrations per month) at sites representing natural concentrations probably reflect global atmospheric Sb dynamics at the watershed scale. Regular seasonal cycles of solid/liquid partitioning, with higher solubility in summer (matching high dissolved and low particulate concentrations), reflect water-discharge and suspended particulate matter transport dynamics and possibly seasonal (bio)geochemical processes. Furthermore, this coefficient decreases from the river to the estuarine reaches (from average log10Kd 4.3 to minimum 3.7 L kg−1), suggesting an increased solubility of Sb in estuarine systems. Flux estimates indicate the relevance of the dissolved fraction in Sb transport (with negligible influence of the colloidal fraction) and a total flux (dissolved + particulate) entering the Gironde Estuary of 5.66 ± 2.96 t year−1 (~50 % particulate). These results highlight the importance of timescales and environmental parameters for understanding and prediction of future Sb biogeochemistry.
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Sinaga, Sabrina Biutiqwin, Solikhun S i Dedi Suhendro. "Pengelompokkan Sumber Air Minum Dari Air Sungai Menggunakan Metode K-Means". Jurasik (Jurnal Riset Sistem Informasi dan Teknik Informatika) 6, nr 1 (28.02.2021): 244. http://dx.doi.org/10.30645/jurasik.v6i1.289.
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River water is one of the most frequently used water by the community and has a multipurpose function for life, one of which is a source of drinking water. However, now we know that the population of river water pollution is very high and it is used as a waste disposal site which causes a lot of river water to be polluted, it can make people susceptible to disease because they consume unhealthy river water. Judging from the data obtained by province, many use river water as a source of drinking water, for this reason the authors conducted a study that aims to classify drinking water sources from river water by province using the K-means Clustering algorithm and will test it with the Rapidminer application, so that Data from 34 provinces will be divided into 3 clusters in which cluster 1 (C1) is a high group, cluster 2 (C2) is a medium group, and cluster 3 (C3) is a low group. The results obtained from this study are C1 with a total of 2 provinces, C2 with a total of 9 provinces, C3 with a total of 23 provinces and the value of the results carried out with the Rapidminer application has the same value. With this research, it is hoped that this can provide information for the government about the data on the grouping of drinking water sources and used as a consideration for overcoming polluted rivers.
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Mohamed Hadi Habaebi, Nur Sakinah Kosnin, Shihabeldin Fadli Yousif Hasan i Md. Rafiqul Islam. "LoRaWAN Monitoring System for Emergency Vital Signs in Pusu River". International Journal of Interactive Mobile Technologies (iJIM) 16, nr 15 (17.08.2022): 93–111. http://dx.doi.org/10.3991/ijim.v16i15.30117.
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Sungai Pusu is the river that passes through the IIUM Gombak campus. The river has been having a cloudy appearance for years hence it is needed to quantify the vital signs such as pH, temperature, and turbidity because these are the vital signs indicating the health of a river. Currently, there a lot of monitoring systems however the available monitoring systems do not support long-range communication and consume a lot of power. The data need to be transmitted at a long-range as it is being monitored remotely at a long distance. Therefore, a river pollution monitoring system must be developed to track the emergency vital signs (EVSs) of the river water The EVs include pH, temperature as well as turbidity. This project capitalizes on the long-range communication and low power consumption LoRaWAN system. The prototype monitoring station design can read the important EVSs of the river such as temperature, pH level, and turbidity. The sensors are connected to a microcontroller board. The readings of the EVSs are transmitted by the LoRa gateway which is forwarding the data to The Things Network Server. A graphical representation of the data is displayed on Ubidots. The results attained quantify the contribution of the IIUM populace to Sungai Pusu Pollution and raise awareness. It is also important to discuss the possibilities to the pollution of the river to see how one’s action could contribute to it. A statistical data of the results is as important so that an overall result can be deduced. Based on the results, the pH is decreased 1.32 pH, the temperature is increased by 2.29°C, and turbidity is decreased by 0.44 NTU throughout the monitoring period. In the future, six more monitoring stations will be added to accommodate KL River of Life (RoL) EVSs too.
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Dimitrova, Ivanka, Jordan Kosturkov i Albena Vatralova. "Industrial surface water pollution in the region of Devnya, bulgaria". Water Science and Technology 37, nr 8 (1.04.1998): 45–53. http://dx.doi.org/10.2166/wst.1998.0307.
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The main purpose of this study is to establish the degree of contamination of the rivers and sources of pollution in the great industrial region of Devnya, situated near the Black Sea, so that appropriate technical means for water quality protection and restoration can be developed. A significant problem arises when untreated or partially treated alkaline industrial wastewater is discharged into the water bodies causing sediment formation in the system of the Devnya and Provadiiska rivers, Beloslavsko lake and Varna-West port. All that leads to serious damages to water environment and enormous losses of human, material and financial resources because of the necessity to dredge the sediments that accumulate in the harbour. A lot of available information about the river water quality and flowrates as well as the industrial wastewater for the period 1948–1996 is gathered. Typical physico-chemical parameters for this industrial wastewater namely, suspended solids, dissolved solids, pH, calcium, chlorides, etc., and some biological and radiological characteristics are determined. The sources of pollution are identified and the degree of contamination is determined. An evaluation of the river water quality according to the standards is made and the trends of the rivers water pollution are shown.
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Zhou, Hong, Guo Zheng Wu i Dong Xiang Hu. "A Study on the Evolution Rule and Culture Analysis of the Spatial Form of Ancient Towns in Yuanshui River Basin". Applied Mechanics and Materials 522-524 (luty 2014): 1684–88. http://dx.doi.org/10.4028/www.scientific.net/amm.522-524.1684.
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The drainage basin of Hunan Yuan River is mysterious because of its multi-ethnic culture. A lot of cities and towns were built along the Yuanshui River because of its convenience in water transportation. Yuanshui River is a complete, unique, diverse and an inseparable group culture system with a series of features like environment complexity, multi-culture integration and long history. This article aims at providing a reference to the construction of modern cities and towns in this drainage basin through a thorough study on the evolution rule of the form of the historical cities and towns along Yuanshui River and a study on the unique multi-ethnic culture features that influenced the form of the ancient towns.
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Afrianti, Suratni, i Julaili Irni. "ANALISA TINGKAT PENCEMARAN LOGAM BERAT TIMBAL (Pb) DI DAERAH ALIRAN SUNGAI DELI SUMATERA UTARA". BIOLINK (Jurnal Biologi Lingkungan Industri Kesehatan) 6, nr 2 (30.12.2019): 153–61. http://dx.doi.org/10.31289/biolink.v6i2.2964.
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The Deli river is the Pioritas I River Basin in North Sumatra, the level of community activity in the Deli river border is high such as settlements, offices, schools and industries, the community has the potential to produce a lot of solid waste in the estuary to the river body so as to make the river polluted, parameters pollution is heavy metal. The purpose of this study is to analyze the Pb content in the Deli River using the AAS tool, from the analysis of the deli river pollution level, the Lead Analysis Result (Pb) obtained from upstream to downstream is an average value of 0.003 ppm, this means that lead pollution (Pb) in the river Deli is still relatively low or has not been polluted by lead heavy metals (Pb) because according to Government Regulation No. 82 of 2001 concerning Water Quality Management and quality pollution control of 0.03 ppm standard water.
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Xiao, Ruiqi, Lin Pan, Hanbin Xiao, Han Xiao i Ze Zhu. "Research of Intelligent Logistics and High-Quality Economy Development for Yangtze River Cold Chain Shipping Based on Carbon Neutrality". Journal of Marine Science and Engineering 10, nr 8 (27.07.2022): 1029. http://dx.doi.org/10.3390/jmse10081029.
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The current status of intelligent logistics and cold chain shipping research is a hot topic worldwide. Meanwhile, the study of regional logistics and regional economy, shipping logistics and regional economic theory and application methods, and the empirical analysis of the correlation between the Yangtze River shipping and the Yangtze River shipping economy have attracted a lot of attention. This research has revealed that the Internet of Things of Yangtze River shipping has a great impact on the Yangtze River and the importance of inland river economic development. This study presents the empirical analysis on the correlation between shipping logistics and the inland river economy, starting from qualitative and quantitative aspects, and taking Yangtze River shipping as the representative. The proposed mathematical models and qualitative data analysis are made on the relevant effects of intelligent logistics and cold chain shipping on an inland river economy including its impact on the industrial layout, international trade, and urbanization. The research results provide administrative decisions or guidance values for the economic development of inland river ports in the Yangtze River.
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Sari, Ridha, i Rini Yunita. "PENGARUH PENGGUNAAN KRIB BAMBU TERHADAP PERUBAHAN PENAMPANG BATANG SINAMAR, KAB. 50 KOTA". Ensiklopedia of Journal 4, nr 4 (27.06.2022): 1–8. http://dx.doi.org/10.33559/eoj.v4i4.1183.
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A river is a natural channel which conduct water discharge that end up in to the sea. The channel and the morphology of a river would change from time to time caused by human ativities or even by nature. There are two things would occure in the river, erosion and sedimentation. In the river engineering activity, groyne built due to increase the stability of the river bank and to catch the sediment. Bamboo, that part of grass species, grows a lot by the river. The river bank is one of the best habitat for bamboo to grows. This research aims to find out how the bamboo groyne could effect the cross section of Batang Sinamar river, 50 Kota District. This research was carried out by implanted the bamboo groyne by Batang Sinamar river bank, and the river’s cross section was measured before and after the implantation. The results of the mesurements were analized by using HEC-RAS program application. The results of this study are expected to be solutions for development that is in harmony with nature, and also support the sustainable development.
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Wu, Taixia, Zenan Xu, Ran Chen, Shudong Wang i Tao Li. "Channel Activity Remote Sensing Retrieval Model: A Case Study of the Lower Yellow River". Remote Sensing 15, nr 14 (21.07.2023): 3636. http://dx.doi.org/10.3390/rs15143636.
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Meandering channel migration is a widespread phenomenon in rivers all around the world. Channel activity, which reflects the rate of change of a meandering channel, is calculated by averaging lateral channel migration. Channel migration can create new channels and abandon old ones, with effects on the natural environment. Floods can even lead to excessive rates of channel migration, which can threaten cities or farmland. Remote sensing can detect the spatial and temporal dynamic characteristics of the river channel, taking into account both spatial and temporal resolution, and can help in planning for the safety of the river channel in advance. Previous studies on river channels have suffered from a low accuracy of data, low level of automation, and subjectivity. To overcome these limitations, we propose a channel activity remote sensing retrieval model (CARSM) in this paper. CARSM extracts water using the modified normalized difference water index (MNDWI) combined with Otsu’s method on the Google Earth Engine (GEE) platform, then extracts the channel centerlines via water mask maps using RivWidthCloud, and finally calculates channel activity based on the geometric relationship of the channel centerlines. With more objective extraction results, CARSM can guarantee more than 95% accuracy of channel activity and its high degree of automation can save a lot of labor costs. We use Landsat images to monitor the channel of the Lower Yellow River and calculate the overall and segmental channel activity separately. Our results show that the overall channel activity of the Lower Yellow River has gradually decreased between 1990 and 2020, with decreases of 33.04% and 41.06%, respectively. Analysis of channel activity reveals that the water sediment pattern of the Lower Yellow River changed from siltation to scouring after the completion of Xiaolangdi Reservoir, and the Lower Yellow River is gradually becoming stable.
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Afanasieva, Olga, i Svitlana Grechka. "FORMATION OF A TRANSPORT AND LOGISTICS RIVER CLUSTER AS A WAY OF IMPROVING THE INLAND WATER INDUSTRY OF UKRAINE". Development of Management and Entrepreneurship Methods on Transport (ONMU) 80, nr 3 (2022): 51–65. http://dx.doi.org/10.31375/2226-1915-2022-3-51-65.
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The main subject of the study is theoretical justification of the impact of the for-mation of a transport and logistics river cluster on the internal water industry of Ukraine. Becauseof a lot of problems on the inland waterways of Ukraine (insufficient funding, shallowing of rivers, unsatisfactory state of hydrotechnical structures and capital assets, imperfect legislation in the industry, overpriced prices, etc.), it is impossible to include domestic river transport into the sys-tem of multimodal transportation, as well as make it the main economy and trade of Ukraine. Therefore, it is necessary to search for innovative directions for the development of river trans-port. That is why the purpose of the article is the development of theoretical and practical aspects of the development of the river sector of Ukraine based on the formation and effective functioning of cluster structures. Many materials and experiences of foreign clusters were studied to show all aspects of working in clusters cooperation. The main advantages and features of the transport and logistics river cluster were considered in the article. There are also identified the main tasks of river clus-ter. Four types of projects, which can improve the position of the industry and the cluster, were presented, such as infrastructure project, innovative project, educational project and the project «Green logistic». A structural model of the formation of a transport and logistics river cluster, which includes enterprises of various specializations (logistic, educational, financial companies, etc.), was proposed.The formation of transport and logistics river clusters is an urgent problem and requires a deeper study. In the future, it is necessary to consider in more detail the methodological founda-tions of the formation and evaluation of the effectiveness of the creation of transport and logistics river clusters.In the article we used different methods: analysis, synthesis, systematic approach, analytical, visualization. Research from this article will be useful for river industry enterprises, river ports and logistics companies, entrepreneurs and authorities who want to improve the situa-tion of the river industry in Ukraine and their own business. Keywords: transport and logistics cluster, river logistics, cluster participants and model, economic results, cluster cooperation projects.
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R S, Sharma, Mandal B K i Das G K. "DIAGNOSTIC ANALYSIS OF CATASTROPHIC FLOOD OVER EASTERN INDIA IN JULY 2017 - A CASE STUDY". MAUSAM 71, nr 3 (3.08.2021): 513–22. http://dx.doi.org/10.54302/mausam.v71i3.53.
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Floods are very common in eastern India during southwest monsoon season. It brings a lot of misery to the people of this region. Every year eastern Indian states namely West Bengal, Odisha and Bihar witness such types of flood during monsoon period. Major river basins in eastern India are Ganga river basin in Bihar and West Bengal area, Odisha has three river basins namely Mahanadi, Subarnarekha, Brahmani and Baitarani [Fig. 1(a)]. As majority of tributary rivers of Ganga passing through Bihar and West Bengal; these two states are more prone to massive flood during monsoon season. The abnormal occurrence of rainfall generally causes floods. It occurs when surface runoff exceeds the capacity of natural drainage. The heavy rainfall is frequently occurring event over the area during South-West Monsoon (SWM) every year. The geographical location of the area, orography and its interaction with the basic monsoon flow is considered as one of prime factors of these heavy rainfall activities. Synoptically, the latitudinal oscillation of eastern end of the Monsoon Trough and the synoptic disturbances formed or passing over the eastern India region and / or its neighbourhood that brings moisture laden Easterly or South-Easterly winds over the area are the main causes responsible for heavy rainfall in this area.
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Dai, L. Q., P. P. Zhang, J. Q. Mao i H. C. Dai. "Effect of Three Gorges Reservoir on River-Connected Lakes in Central Yangtze River". Advanced Materials Research 726-731 (sierpień 2013): 1305–8. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.1305.
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As a very critical indicator of the health of the lake, water level of the river-connected lakes is influenced by both watershed inflows and the mainstream. Lakes connected to the Yangtze River has showed big differences since the impoundment of the TGR in 2003, as the hydrological regime in central Yangtze River has changed a lot. In order to grasp the effect of the TGR on the river-connected lakes, based on the water level data of four typical stations in Poyang Lake during the water release operation and storage period before and after the impoundment, the variation of water level is compared and discussed. It is shown that water level of Poyang Lake has undergone changes. In the water release operation stage, the average water level is higher, but in the storage period from late September to October, the average water level of the lake lower than before. In addition, it is pointed out that the extent is gradually reduced from north to south, as the max influence water level is about 1.5 meters and the average influence water level is about 0.6 meters in Hukou station. However, considering the time since the dam n period has not been long, the reservoir effect still needs to be further assessed based on long-term monitoring.
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Djukić, Aleksandra, Jelena Marić, Branislav Antonić, Vladimir Kovač, Jugoslav Joković i Nikola Dinkić. "The Evaluation of Urban Renewal Waterfront Development: The Case of the Sava Riverfront in Belgrade, Serbia". Sustainability 12, nr 16 (15.08.2020): 6620. http://dx.doi.org/10.3390/su12166620.
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Belgrade is the only capital in the world at the confluence of two major international rivers navigable for global shipment—the Danube and the Sava River. However, it was only after the unification of all riversides within Yugoslavia in 1918 that Belgrade started to develop its riverfront; initially, as green recreation areas during the socialist era. Since the post-socialist transition, this trajectory has sharply changed in order to create new urban nodes along the riverfront. The best example is the newest project of the urban renewal of waterfront development at the Sava River, the “Belgrade Waterfront Project.” This mega-project has sparked a lot of attention. The aim of this research is to present, evaluate, and spatially determine this attention before and after the project inauguration. This observational study is conducted by using two methods from social discourse: a survey, as a traditional method, and analysis based on social network data (Twitter) as a newer, “smarter” one. Comparing and mapping their results, this research offers recommendations on how to harmonize and modernize the development of this crucial potential of Belgrade.
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Kumie, Getahun Antigegn. "Water Governance and Water Management Systems in the Tekeze River Basin". RUDN Journal of Political Science 21, nr 3 (15.12.2019): 439–49. http://dx.doi.org/10.22363/2313-1438-2019-21-3-439-449.
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The fact that a lot of fresh water resources in Ethiopia are shared between several sovereign states creates a difficult situation in terms of water governance and management. Since there is no central agency that can regulate the utilization of water, the autonomous riparian actors pursue their respective interests. Water is shared at local, national and international levels; and difficulty in water supply management arises from lack of coordination between local, national and international authorities. Most of the Ethiopian rivers are trans-boundary, i.e. shared by several sovereign states. The purpose of this paper is to examine water governance and management systems in the Tekeze River basin. The author uses the qualitative research method to critically examine the existing scarce literature sources and governmental policy documents. The findings of the study revealed the absence of any kinds of bilateral agreements among the riparian states of the Tekeze River basin. As the water governance system in the region is highly politicized, there exists a certain clash of interests between the Tekeze River nations. The constant conflict in the region disrupts cooperation needed for facility maintenance in the Tekeze River basin. The problems in the area arise due to the following factors: no demarcated boundaries between the basin states; no effective water governance system, and, as a result, no efficient and cooperative utilization of fresh water resources; lack of institutional and legal arrangements between the major riparian states.
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Damanhuri, Endang Agus, Yusni Ikhwan Siregar i Elfizar Elfizar. "PENERAPAN MODEL BERBASIS ARTIFICIAL NEURAL NETWORK UNTUK MEMPREDIKSI KUALITAS AIR DI SUNGAI SUBAYANG KABUPATEN KAMPAR". Jurnal Ilmu Lingkungan 14, nr 1 (18.03.2020): 18. http://dx.doi.org/10.31258/jil.14.1.p.18-28.
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Water quality management is very important to do, because water is an inseparable part of everyday human life. Monitoring water quality is a way to maintain the quality of waters, especially rivers. River quality monitoring that is usually done requires a lot of equipment, effort and expertise so that its application becomes expensive and complicated. Technology that is growing rapidly nowadays puts forward artificial intelligence as the backbone of the Industrial Revolution 4.0 which promises many conveniences for industry and government. One of artificial intelligence technology is machine learning with Artificial Neural Network algorithm which is commonly used to predict or forecast a future value. This artificial neural network can be used to help monitor river water quality. The objective of this research to develop Artificial Neural Networks (ANN) model to predict the paramater of river quality (DO, pH, turbidity, temperature, water flow, conductivity) in the Subayang River, Kampar Regency, using software Rapidminer. The performance of the ANN models was evaluated using root mean squared error (RMSE) and correlation squared (R2) as a second comparison, then the results of the testing implementation are compared with direct measurements in the field. With the RMSE values obtained in the test results of each parameter DO = 1.613, pH = 0.098, turbidity = 4.730, temperature = 0.493, water flow = 0.121 and conductivity = 0.909. The lower the RMSE level, the closer it is to Artificial Neural Network accuracy for value prediction.
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Jyoti Das, Nanda Karmaker i Ruhul A. Khan. "Reasons and consequences of river water pollution and their remediation: In context of Bangladesh". GSC Advanced Research and Reviews 7, nr 1 (30.04.2021): 023–24. http://dx.doi.org/10.30574/gscarr.2021.7.1.0066.
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As the population grows and the uncontrolled industrialization, urbanization rises as well, it is high time we should give proper attention to the fact of river pollution in our country which is deploying harmful impacts both on human health and environmental, aquatic ecosystem. A plethora of studies have been done on different aspects of river water pollution. In this paper a thorough discussion regarding this fact has been presented compiling a number of important studies on it. Major causes behind this pollution have been mentioned widely, like improper management of industrial and sewage effluents. However, to detect this contamination in the major rivers of Bangladesh, various studies have been done to see the physicochemical properties of the water, such as pH, turbidity, color, odor, DO, TOD, COD, TSS, EC, dissolved metal, and other chemical and bacteriological substances etc. The microorganisms within the water are the prime sources to cause different water borne diseases like Diarrhea, Cholera, Scabies and Asthma. To find out the remedies to this problem, urgent emphasis should be given on preventive measures and to take appropriate steps to halt and improve the existing pollution of the rivers. A lot of water treatment systems are being practiced throughout the world to restore the health of the rivers as well as to reuse the waste water. Though the systems are not much popular in Bangladesh, the government should facilitates the practice of them extensively and strengthen the laws against environmental pollution.
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Setyo Koenhardono, Eddy, Sardono Sarwito, RO Saut Gurning, M. Badrus Zaman, Alam Baheramsyah, Indra Ranu Kusuma, Beni Cahyono, Juniarko Prananda, Totok Yulianto i Hasannudin. "Development of Ecotourism Floating Restaurant in Surabaya City". MATEC Web of Conferences 177 (2018): 01010. http://dx.doi.org/10.1051/matecconf/201817701010.
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In the 18th century, Kalimas’s river serves as a workspace, marketing space, and transportation routes for residents of Surabaya. Although the current condition of Kalimas river has changed a lot, but Kalimas’s river has good potential of water tourism and transportation facilities. Therefore, the Surabaya city government setup a policy to revitalize the Kalimas’s River. The submarine monument area as one of Surabaya's landmarks next to Kalimas’s River will be developed as a 'Riverside Center Business Center'. One feasible way to support the city government program is the development of a floating restaurant. Floating restaurant is just a place to eat, when doing business negotiations or family tours. The concept of floating restaurant development based on ecotourism. Hence, this restaurant is designed environmentally friendly, empowering local people, and become a means of learning and education. The eco-friendly concept is manifested in a flat outward-side asynchronous catamaran form and battery-based electric propulsion systems and solar panels. The menus are provided by local vendors along the river bank of Kalimas so the local food supplier will be more empowered.
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Nguyen, Xuan Tinh, Hitoshi Tanaka, Ryutaro Hirao, Eko Pradjoko, Akira Mano i Keiko Udo. "MORPHOLOGY CHANGE CAUSED BY THE 2011 GREAT TOHOKU TSUNAMI WAVE – MECHANISM OF RECENT CLOSURE AND BREACHING OF THE NANAKITA RIVER MOUTH". Coastal Engineering Proceedings 1, nr 33 (15.12.2012): 110. http://dx.doi.org/10.9753/icce.v33.sediment.110.
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The 2011 Great Tohoku Earthquake and Tsunami in March had caused a lot of damages to people and infrastructure in Japan. With a giant tsunami height plus the subsidence due to earthquakes have destroyed most o f the nearshore constructions and coastal zone areas. According to measured data from the survey group (Mori et al. 2011); maximum
tsunami wave height measured at the Nanakita area is about 14m. This Tsunami made the topography of this region changed drastically. Many breaching places occurred along the coast and river mouth. This study will focus on investigating the mechanisms of sediment transport and hydrodynamics leading to the river mouth was closed in about five months after the event and then breached in a different location during the river flood.
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Izdori, Fides, Augustina Alexander, Deogratias Mulungu i Lucius Mugisha. "Assessing Morphological Changes of the Msimbazi River Using Satellite Images". Tanzania Journal of Engineering and Technology 41, nr 4 (31.12.2022): 15–23. http://dx.doi.org/10.52339/tjet.v41i4.871.
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This study assessed historical morphology changes of the Msimbazi River in Dar es Salaam City, Tanzania, following heavy rainfall events using historical Google earth images. The erosion and sedimentation processes that cause morphological changes of a river are also associated with flooding within the river catchments. In this study, the bank-line movement, erosion and sedimentation areas and changes in river section width were analyzed under three-time periods: 2005- 2012, 2012- 2018, and 2018- 2020. Data shows that, the timing for floods coincides with the historical records for heavy rains. It was found that, area in the upper reaches of the river such as Kinyerezi suffer from river bank erosion most, as indicated by the large increase in river width. This has resulted into washing away of infrastructure including houses and loss of land. The river channel width at Kinyerezi has widened a lot since 2005, with some sections having widths of more than 90 m. On the lower reaches for example around Kigogo and Jangwani areas, deposition of the soil materials prevails, resulting into raised river bed and reduced river widths. As the river section an hence carrying capacity is reduced, inundation of river banks occurs. This is among the causes of river bank flooding reported at these areas whenever there is a heavy storm event. It is therefore recommended that interventions to solve the flooding events in Dar es Salaam city should also include preventing catchment and river bank erosion on the upstream areas.
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Safiana, Dian, Eldina Fatimah i Azmeri Azmeri. "STUDI SEDIMENTASI PADA DAS SEUNAGAN KABUPATEN NAGAN RAYA". Jurnal Arsip Rekayasa Sipil dan Perencanaan 2, nr 3 (20.09.2019): 224–34. http://dx.doi.org/10.24815/jarsp.v2i3.13459.
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Seunagan River Basin Area has a very important role as a water needs for the people in Nagan Raya Regency and the half of West Aceh Regency. The condition of Krueng Seunagan River Basin Area is getting more and more critical which is marked by a lot of dangerous activities inside and outside the River Basin Area such as mining, land conversion and so on. This study aim are for knowing how much a yearly sediment production that happened in Krueng Seunagan River Basin Area and the Sediment Delivery Ratio (SDR) and also to recommend the effort of land conservation. From the sediment rate analysis in Sub River Basin Areas, it obtained variation sediment rate that spread over 4 Sub River Basin Areas. From the yearly sediment production analysis result can be confirmed that the largest sediment production happened in Seunagan Hulu Sub River Basin Area, which the sediment production is 143.879,08 ton/year and then followed by Seunagan Hilir Sub River Basin Area 135.644,02 ton/year, and then Cut Sub River Basin Area 116.016,74 ton/year and the smallest sediment production happened in Isep Sub River Basin Area which the sediment production is 107.985,52 ton/year. The Sediment Delivery Ratio (SDR) result for each sub river basin area is Seunagan Hulu 9,6%, Isep 12,2 %, Cut 11,8% and Seunagan Hilir 10,0 %
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Shinn, C., F. Dauba, G. Grenouillet, G. Guenard i S. Lek. "Temporal variation of heavy metal contamination in fish of the river lot in southern France". Ecotoxicology and Environmental Safety 72, nr 7 (październik 2009): 1957–65. http://dx.doi.org/10.1016/j.ecoenv.2009.06.007.
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Orieux, Nicolas, Sébastien Cambier, Patrice Gonzalez, Bénédicte Morin, Christelle Adam, Jacqueline Garnier-Laplace i Jean-Paul Bourdineaud. "Genotoxic damages in zebrafish submitted to a polymetallic gradient displayed by the Lot River (France)". Ecotoxicology and Environmental Safety 74, nr 4 (maj 2011): 974–83. http://dx.doi.org/10.1016/j.ecoenv.2011.01.008.
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Radu, Carmen Elisabeta, Edward Rășchitor i Iosif Tempea. "Calculation of the Collapsing Critical Load of a Translating Cam Mechanism and Roller Translating Follower Actuating an Elevator". Advanced Engineering Forum 42 (7.09.2021): 99–106. http://dx.doi.org/10.4028/www.scientific.net/aef.42.99.
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The above-ground parking lot above Dâmbovița river has stemmed from the need to cover the lack of parking lots in Bucharest. The parking lot may be serviced, in case of emergency, by auxiliary elevators that are operated by mechanisms provided with translating cams and roller translating followers. In this paper, a calculation of the collapsing critical load shall be performed. One shall also analyze here the rod model and the model with several rods of the mechanism provided with a translating cam and roller translating follower. In order for the rods to resist collapsing, one must be found in the elastic field, thus verifying Euler’s formula.