Kliknij ten link, aby zobaczyć inne rodzaje publikacji na ten temat: River equipment.
Artykuły w czasopismach na temat „River equipment”
Utwórz poprawne odniesienie w stylach APA, MLA, Chicago, Harvard i wielu innych
Sprawdź 50 najlepszych artykułów w czasopismach naukowych na temat „River equipment”.
Przycisk „Dodaj do bibliografii” jest dostępny obok każdej pracy w bibliografii. Użyj go – a my automatycznie utworzymy odniesienie bibliograficzne do wybranej pracy w stylu cytowania, którego potrzebujesz: APA, MLA, Harvard, Chicago, Vancouver itp.
Możesz również pobrać pełny tekst publikacji naukowej w formacie „.pdf” i przeczytać adnotację do pracy online, jeśli odpowiednie parametry są dostępne w metadanych.
Przeglądaj artykuły w czasopismach z różnych dziedzin i twórz odpowiednie bibliografie.
1
Wang, Xiao Yan, Jian Guo Wang, Chen Xi Wang, Chang Jun Zhang i Kai Deng. "Equipment Design of Pollution Control". Applied Mechanics and Materials 577 (lipiec 2014): 1215–18. http://dx.doi.org/10.4028/www.scientific.net/amm.577.1215.
Pełny tekst źródłaStreszczenie:
Hubei Shiyan is the largest city in the source of South to North Water Diversion Project in China. The City District has 100 km of river, along cross-strait with high-rise buildings, dense population, and coverged sewage straight flow to the river. In our paper, the design of "Ming change dark" river closure project can fundamental solve the city environmental pollution problems, improve the source water quality without any menace from the "rear", and make Shiyan's green economy grow rapidly. On the other hand, this "city agriculture" new thinking will completely change the serious situation of arable land area which is decreasing year by year in the world.
2
Drieu, Michael D., i Kurt Hansen. "Fast Water Response Equipment Performance in Two Inland Rivers1". International Oil Spill Conference Proceedings 2003, nr 1 (1.04.2003): 1291–96. http://dx.doi.org/10.7901/2169-3358-2003-1-1291.
Pełny tekst źródłaStreszczenie:
ABSTRACT About 70% of the oil transported on United States waterways between 1992 and 1997 were on waterways with currents that routinely exceed one knot. About 58 percent of all of the oil spilled (by volume) also occurred on these waterways. Approximately 80% of these waterways are in the Western Rivers and Mississippi River Marine Transportation System, which are safeguarded under the jurisdiction of six Marine Safety Offices (MSOs) and three Groups in the Eighth Coast Guard (CG) District. The U.S. Coast Guard Research & Development (CG R&D) Center has been evaluating the state-of-the-art of containment and cleanup of oil in currents over 1 knot since 1997. Three types of equipment from the previous CG R&D Center's evaluations, boom deflector, boom vane and oil spill Flow-Diverter, were further evaluated in the field exercises along with the Coast Guard's only pre-deployed Vessel Of Opportunity Skimming System (VOSS) in the inland rivers region. These two exercises were the first time the VOSS system was used in the Eighth District rivers. Partnerships helped to facilitate first time deployment of the VOSS on a commercial ferry and a CG River Tender. The first exercise evaluated the Boom Vane, boom deflector and the St. Louis-based CG VOSS, which was deployed from State of Illinois Department of Natural Resources’ (ILDNR) ferry in Grafton, Illinois in May 2001. In the other exercise, the flow-diverter was deployed from a small boat and the CG VOSS, was deployed from the CG River Tender, CGC CIMARRON in Paducah, KY in August 2002. These exercises demonstrated the usefulness of these advance systems in fast water environments.
3
Wende, Christina, Christophe Lambert, Juergen Hoeher i Maurice Balke. "Injuries and Use of Safety Equipment in River Surfing". Orthopaedic Journal of Sports Medicine 11, nr 4 (1.04.2023): 232596712311558. http://dx.doi.org/10.1177/23259671231155884.
Pełny tekst źródłaStreszczenie:
Background: River surfing (also called “rapid surfing”) involves surfing on stationary waves that are artificially created or placed in rivers and is gaining popularity, especially among surfers in landlocked areas but also among athletes without experience in ocean surfing. Different wave setups, types of boards, and types of fins, as well as the use of safety equipment, can lead to overuse and injuries. Purpose: To analyze the incidence, mechanisms, and risk factors of river surfing–related injuries for different types of waves and to evaluate the usage and appropriateness of safety equipment. Study Design: Descriptive epidemiology study. Methods: An online survey was distributed via social media to river surfers in German-speaking countries to collect information on demographics, injury history for the previous 12 months, wave site attended, use of (safety) equipment, and health issues. The survey was accessible between November 2021 and February 2022. Results: A total of 213 participants completed the survey: 195 participants from Germany, 10 from Austria, 6 from Switzerland, and 2 from other countries. The mean age was 36 years (range, 11-73 years), 72% (n = 153) were male, and 10% (n = 22) took part in competitions. Overall, 60% (n = 128) of surfers experienced 741 surfing-related injuries over the previous 12 months. The most common mechanisms of injury were contact with the bottom of the pool/river (n = 75 [35%]), with the board (n = 65 [30%]), and with the fins (n = 57 [27%]). The most frequent injury types were contusions/bruises (n = 256), cuts/lacerations (n = 159), abrasions (n = 152), and overuse (n = 58). Injuries affected mainly the feet/toes (n = 90), head/face (n = 67), hand/fingers (n = 51), knee (n = 49), lower back (n = 49), and thighs (n = 45). Earplugs were used by 50 (24%) participants, and a helmet was used regularly by 38 (18%) participants and never by 175 (82%) participants. Conclusion: The most frequent types of injury in river surfers were contusions/bruises, cuts/lacerations, and abrasions. The main mechanisms of injury were contact with the bottom of the pool/river, with the board, or with the fins. The feet/toes were more prone to injuries, followed by the head/face and hand/fingers.
4
Zhang, Yin Long, Shi Chuan Bian, Jun Xiang Lin i Zhao Xiang Shen. "Research on Lightweight Technology Application in River-Crossing and Military Bridge Equipment". Advanced Materials Research 753-755 (sierpień 2013): 486–94. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.486.
Pełny tekst źródłaStreszczenie:
Lightweight technology application in river-crossing and military bridge equipment has important significance to promote rapid development. Lightweight can efficiently reduce the weight, promote structure optimization and improve performance of the river-crossing and military bridge equipment. After basic principles and main technologies of the lightweight application in the river-crossing and military bridge equipment components are summarized, strength design technologies for the lightweight of the equipment components are discussed, and simple shape components strength design criteria under tension/ compression, bending, shearing and torsion are analyzed, which is extended to general lightweight components strength design criteria. On the basis of the lightweight design principles and strength design criteria, appropriate design methods and optimization strategies are selected, suitable lightweight high-strength material is chosen according to research and development demands, and the lightweight purpose for the river-crossing and military bridge equipment is realized.
5
Rahmanita, Myrza, Prasadja Ricardianto, Rizky Wijayanti, Lira Agusinta, Fetty Asmaniati, Sundring Pantja Djati, Yana Tatiana, Willy Arafah, Isa Amsyari i Endri Endri. "The impact of the safety of passenger ship services on the development of water recreation: evidence from Indonesia". Uncertain Supply Chain Management 11, nr 3 (2023): 1121–32. http://dx.doi.org/10.5267/j.uscm.2023.4.010.
Pełny tekst źródłaStreszczenie:
This research aims to assess the safety of ship passenger services as one of the efforts to promote water recreation on the Musi River, South Sumatera. Rivers in Indonesia, through their role as a means of moving goods and people, greatly influence transportation and tourism, especially water recreation. Without safe transportation, there will be no travel and tourism industry. The accident rate of river transportation in Indonesia, including on the Musi River, today is still relatively high, and there still is no care about the assessment of riverboat services safety. The safety assessment was done with the analysis method using gap analysis with the analysis technique of Importance Performance Analysis. The research was conducted in Wharf 16 Ilir Palembang with a sample of as many as 264 people, including ship operators, passengers, and regulators. The study finds first that most users of riverboat services on the Musi River tend to be unsatisfied. Second, the need to improve the information on the safety equipment storage and the availability of safety equipment use instructions. Based on the findings, to develop water recreation on the Musi River, boat condition setting, and boat passenger safety are essential factors to be prioritized since the passengers or tourists mainly consider them in using sea transportation.
6
Bajrami, Šerif. "Modern equipment of river units: RIB 720 rubber boat". Vojno delo 69, nr 7 (2017): 303–19. http://dx.doi.org/10.5937/vojdelo1705303v.
Pełny tekst źródła
7
Startsev, A. M., I. A. Khudyakov i A. F. Levashova. "Improvement of the mechanical equipment of river navigation structures". Hydrotechnical Construction 19, nr 10 (październik 1985): 521–26. http://dx.doi.org/10.1007/bf01433081.
Pełny tekst źródła
8
Ostrowski, Piotr, i Marta Utratna-Żukowska. "The new concept for the heavy vehicles crossing in the large lowland riverbeds in the North East Strategic Direction". Journal of Konbin 53, nr 1 (31.03.2023): 59–78. http://dx.doi.org/10.5604/01.3001.0016.3239.
Pełny tekst źródłaStreszczenie:
The current method of crossing river channels by heavy vehicles involves engineering equipment such as the Motorized Floating Bridge. It has high efficiency when crossing regulated channels of large European Lowland rivers with stable hydrological conditions. In the case of unregulated rivers of the Polish Lowlands, this concept needs to be modified due to the high variability of water levels and the shape of the river bottom. This paper presents a new approach to crossing the channels of large lowland rivers by heavy vehicles. It is based on hydrological analyses and experience gained during many years of hydrographic, geological, and geomorphological studies conducted at the Department of Hydraulic Engineering and Applied Geology of the Warsaw University of Life Sciences (SGGW).
9
Zhou, Min, Sheng Li i Yu Wu. "Study on Agglomeration Level and Effect of Equipment Manufacturing Industry in the Yangtze Delta Urban Agglomeration". Mathematical Problems in Engineering 2021 (27.04.2021): 1–9. http://dx.doi.org/10.1155/2021/9957049.
Pełny tekst źródłaStreszczenie:
This paper analyzes the agglomeration level and agglomeration effect of 8 subindustries of equipment manufacturing industry and 26 prefecture-level cities in the Yangtze River Delta (YRD). From the perspective of industry, the agglomeration change trend of 8 subsectors of equipment manufacturing industry from 2006 to 2016 in the Yangtze River Delta Urban Agglomeration (YRDUA) is analyzed. From the perspective of cities, the spatial differences of equipment manufacturing agglomeration degree in 26 prefecture-level cities in the YRDUA are discussed. By using CES production function, the agglomeration effect of equipment manufacturing agglomeration is studied. The results show that the YRDUA has formed an agglomeration pattern of equipment manufacturing industry, with Shanghai as the core, and Hefei, Hangzhou, Suzhou, and Nanjing as the auxiliary cities, and the overall agglomeration effect in the region is relatively obvious.
10
Azhim, Fandi, Suhariyanto , i Burhamtoro ,. "ALOKASI KEBUTUHAN ALAT BERAT PADA PEKERJAAN NORMALISASI MUARA SUNGAI SIBELIS KOTA TEGAL". PROKONS Jurusan Teknik Sipil 12, nr 1 (17.07.2019): 44. http://dx.doi.org/10.33795/prokons.v12i1.151.
Pełny tekst źródłaStreszczenie:
The estuary of River Sibelis is vessel traffic modes of fishermen and the risk rob flooding. The estuary of River Sibelis (STA 0+00 – STA 0+373) project employed some heavy equipment to undertake the project. The purpose of find out the needs of heavy equipment, productivity of heavy equipment, the duration of work and heavy equipment operational cost. The required data were of layouts, cross sectional drawings of the river estuary, and specifications of heavy equipment. Microsoft Excel program was applied for the calculation and the schedule using method Barchart.The implementation results are as follow: 1) exavating sediment on 29 work days using 1 unit of crane barge in productivity of 80.8 m3/h at Rp. 1.120.384.700,- ; 2) excavating sediment on 16 work days using 2 units of backhoe, 2 units of barge, and 1 unit of tug boat in productivity of 48 m3/h at Rp.351.309,- ; 3) setting sheet pile on 33 work days using 2 units of crawler crane, 1 unit of diesel hammer, 1 unit of tug boat, and 2 units of barge in productivity of 11 m/h at Rp. 805.385.500,-; at total cost project of Rp. 2.846.349.000,- on 63 work days. Keywords: heavy equipment, productivity, time, cost
11
Din, Abdul Talib, V. K. Kher i Chee Fai Tan. "An Innovative Method of Harnessing Hydraulic Energy for Mini Cost-Saving Water Treatment Plant Using Hydraulic Turbine: A Mathematical Approach towards Design and Analysis". Applied Mechanics and Materials 752-753 (kwiecień 2015): 833–38. http://dx.doi.org/10.4028/www.scientific.net/amm.752-753.833.
Pełny tekst źródłaStreszczenie:
River pollution has been a well-known worldwide issue and the impacts of polluted rivers are greatly affecting the health well-being of people worldwide. Meanwhile water treatment plants (WTP) have increasing energy cost. However, an abundance of hydraulic energy is stored in the flowing river water. The hydraulic energy can be harvested to be converted into mechanical energy to operate the WTP. This paper is focused on explaining an efficient and green method to harvest hydraulic energy to reduce the energy cost incurred by the usage of motorized equipment in conventional WTP. This product has dual purpose with dual benefit of restoring the quality of river water quality as well as harvesting readily available hydraulic energy to reduce energy cost.
12
Pian, Feng, Yi Peng Jiang i Wei Xin Luan. "Research on the Equipment Manufacturing Industry's Interregional Industrial Linkages in the Bohai Sea Region". Advanced Materials Research 712-715 (czerwiec 2013): 3133–38. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.3133.
Pełny tekst źródłaStreszczenie:
As the largest economic region in northern China, Bohai Rim becomes the third of China's economic growth poles after the Pearl River Delta and Yangtze River Delta which has an extremely important position in China's economic development. How to strengthen the industrial linkages of the equipment manufacturing industry in Bohai Sea region becomes the promotion of regional development is a pressing matter of the moment. Analysis the industrial linkages of the equipment manufacturing industry in Bohai Sea region using MRIO method, as related to the development of regional industrial policy of equipment manufacturing industry to provide a basis for decision making.
13
Əhmədov, F. Ş. ,., R. K. ,. Quliyev i R. Ü. Əbdüləzimov. "SEL VƏ DAŞQIN AXINLARINDA DAĞ ÇAYLARI MƏCRASININ YUYULMA DƏRİNLİYİNİN TƏYİNİ". “Water Problems: science and technologies” 1, nr 1 (10.06.2021): 82–88. http://dx.doi.org/10.30546/wtst.2020.1.82.
Pełny tekst źródłaStreszczenie:
Abstract. The article is dedicated to the determination of the wash depth of mountain rivers in floods and overflows. As well-known, hydrotechnical equipment is exposed to destructive damages of the floods and overflows. The undersurface of bridge basement and coast guards are washed away, the surface of drainage devices in water supply and dams (Düker) at river crossings are opened up. Therefore, the protection of the equipment against the destructive damage of the floods and overflows should be ensured. To this aim, first of all, the depth of the fortification of the equipment basement in riverbeds and the width through which the river can flow should be determined and the works of installing coast guards should be accordingly implemented. Since the flow regime of rivers due to floods in the course of mountain riverbeds dramatically changes, the width, depth, roughness and cross-sectional area of the riverbed also changes. To that reason, in the smallest case, calculation formulas includes the average width and wash depth of the riverbed in the course of the floods and overflows, average diameter of undersurface soils, the slope of the location of hydrotechnical structures, velocity due to the average diameter of the riverbed soils and so on. The article contains the analyses of theoretical and practical materials about the floods and overflows in mountain rivers. For the rivers flowing through the southern hills of Great Caucasus Mountains, the expressions for determining the riverbed parameters and hydrological parameters of rivers are used. According to the expressions, average width due to non-washing of the riverbed in floods in accordance with flood flow and slope of the studied part of the riverbed, the average depth of the riverbed crossing the flood, the average velocity of the flow and the wash depth in accordance with them are determined. basing on all these, the determining method of the wash depth of mountain riverbeds in floods have been worked out and determining the wash depth have been recorded. The studied methodology can be used in determining the riverbed parameters in floods and overflows. Keywords: Flood, riverbed deformation, mountain river, wash depth, average diameter of undersurface sediments, riverbed stability, flood velocity
14
Trifu, M. C., i V. Daradici. "New monitoring technique for rapid investigation of nitrates pollution in aquatic systems". Proceedings of the International Association of Hydrological Sciences 364 (16.09.2014): 481–85. http://dx.doi.org/10.5194/piahs-364-481-2014.
Pełny tekst źródłaStreszczenie:
Abstract. In situ measurement with a portable multi-parameter sonde was used in the framework of the Cleanwater project – LIFE09 ENV/RO/000612, for a rapid investigation of nitrates pollution in Barlad River basin, in rivers and domestic wells, in addition to laboratory measurements. Water samples were analysed in an accredited laboratory for water monitoring, such as the Vaslui Water Management System from Barlad basin. Sampling campaigns were performed monthly in the period April–November 2011. In order to find the main factors that influence the measurements, the behaviour of equipment was analysed in rivers, for different water sampling points along the river and the cross-sections, taking into account the water level, the turbulence, the vegetation and the obstacles along the river. Results proved the multiparameter sonde as a useful device for rapidly monitoring spatial distributions or temporal trends of nitrates or chlorophyll a, and detecting sudden changes in surface and groundwater quality.
15
Cintra, Jorge Pimentel. "THE EXPLORATION OF THE TIETÊ RIVER BY THE COMISSÃO GEOGRÁFICA E GEOLÓGICA (1905): CARTOGRAPHIC ASPECTS". Boletim de Ciências Geodésicas 23, nr 2 (czerwiec 2017): 309–26. http://dx.doi.org/10.1590/s1982-21702017000200020.
Pełny tekst źródłaStreszczenie:
This paper studies the cartographic products associated with the Tiete River Exploration Report, (1905) published by the Geographical and Geological Committee of the São Paulo Province. The expedition, from the Bar of the Jacaré-Guassú River to the Paraná River, led to the mapping of the Tietê River, which, along with others, is part of the efforts made by this state agency so that there was no longer a great region called "Unknown hinterland inhabited by Indians" in the official map of the Province of Sao Paulo. The purpose was not only to map, but also to raise the mineral resources, the geology, focused on the types of soil and its agricultural potential, and the navigability of rivers for transporting people and goods. The data obtained are studied (altitudes, longitudes, magnetic declination), surveys paths, equipment used, work methodology and the Cartography produced: General Map, Partial Maps, Profile, Cross Sections and others.
16
Zan, Rixia, Kishor Acharya, Adrian Blackburn, Chris G. Kilsby i David Werner. "A Mobile Laboratory Enables Fecal Pollution Source Tracking in Catchments Using Onsite qPCR Assays". Water 14, nr 8 (11.04.2022): 1224. http://dx.doi.org/10.3390/w14081224.
Pełny tekst źródłaStreszczenie:
Onsite molecular diagnostics can revolutionize fecal pollution source tracking. We aimed to validate a method for onsite qPCR assays with a miniature speaker-sized Q qPCR instrument and other portable equipment items. We showed that marker genes for total bacteria (16S) and E. coli (rodA) in 100 mL of river water measured with this method agreed within ±0.3 log10 units with results obtained when using conventional laboratory equipment items. We then deployed the portable method in a mobile laboratory (‘lab in a van’) and quantified HF183 marker genes for human host associated Bacteroides in river water within 3 h of sampling. We also used the mobile laboratory to investigate urban river water and effluents from two storm drains and a retention pond and collected comprehensive microbial and physicochemical water quality data. We found significantly higher HF183 gene levels in the older storm drain compared to the river water (6.03 ± 0.04 vs. 4.23 ± 0.03 log10 gene copies per 100 mL), and a principal component analysis revealed that storm drain effluent retention in a pond beneficially altered water characteristics, making them more like those of the receiving river. In conclusion, onsite qPCR assays can be performed with portable equipment items to quickly test water.
17
Kher, V. K., Abdul Talib Din i Chee Fai Tan. "Harnessing Buoyancy Force to Operate Mini Cost-Saving Water Treatment Plant for River Inlets". Applied Mechanics and Materials 761 (maj 2015): 604–8. http://dx.doi.org/10.4028/www.scientific.net/amm.761.604.
Pełny tekst źródłaStreszczenie:
River pollution has been a global issue and the consequences of polluted rivers are significantly affecting human health and well-being. Meanwhile, water treatment plants (WTP) are often related to high energy cost. Nevertheless, there is an abundance of hydraulic energy stored in the flowing water, which can be converted into mechanical energy to operate the WTP. The focus of this paper is to describe an innovative method of harnessing buoyancy force to save the energy cost of commonly used motorized equipment in the conventional WTP. The benefit of this product is to create a green environment by utilizing a readily available hydraulic energy and restoring river water quality. This study has shown that a cost-saving water treatment plant operating based on buoyancy force is feasible. This product enables electricity cost to be minimized while treating river water at the same time.
18
Wiltshire, Glenn A., i Lewis Corcoran. "Response to the Presidente Rivera Major Oil Spill, Delaware River1". International Oil Spill Conference Proceedings 1991, nr 1 (1.03.1991): 253–58. http://dx.doi.org/10.7901/2169-3358-1991-1-253.
Pełny tekst źródłaStreszczenie:
ABSTRACT On June 24, 1989, the Uruguayan tankship Presidente Rivera grounded in the Delaware River south of Marcus Hook, Pennsylvania. The grounding resulted in the discharge of over 300,000 gallons of “high pour” No. 6 oil into the river. This paper discusses the actions taken by the various involved parties to respond to the spill and to remove the oil from the river and its shorelines. Cleanup operations were especially difficult because of the tar-like consistency of the oil, the nonavailability of appropriate containment and recovery equipment, and the accessibility and environmental sensitivity of areas affected by the oil. Nontraditional methods, including clamshell bucket dredges and hopper barges, had to be used to contain and remove the oil from the water. The paper also addresses some of the political issues faced by the federal on-scene coordinator during this response and cleanup.
19
Hidayat, M., D. Legono, B. Wignyosukarto, R. Jayadi, A. P. Rahardjo, A. Hairani, P. Harsanto i J. Ikhsan. "Flow Behavior of Boyong River as Revealed by Long-term Hydro-monitoring System". IOP Conference Series: Earth and Environmental Science 930, nr 1 (1.12.2021): 012023. http://dx.doi.org/10.1088/1755-1315/930/1/012023.
Pełny tekst źródłaStreszczenie:
Abstract Boyong River is one of many rivers originating from Mt. Merapi, flows across three autonomy administrative of Sleman Regency, Yogyakarta City, and Bantul Regency. The river experiences flood in the form of lava flow several times, and the 1994 and 2010 occurrences were considered the biggest ones along with the river history. In line with the rapid development of information and communication technology, efforts to develop the early warning system due to the Mt. Merapi disaster have been implemented by the Hydraulic Laboratory of Gadjah Mada University 2006. This paper presents the study results of Boyong River flow behavior by analyzing the data obtained from the monitoring system. The Gemawang Weir at Boyong River was selected as the river control point understudy; those include the catchment boundary, the catchment characteristics, and the hydraulic features. Monitoring equipment consists of an automatic water level recorder (AWLR), the flow visualization using a Brinno camera, and the hydrophone monitoring system. The flow hydrograph characteristics and its corresponding sediment transport rate are considered two parameters for identifying the flow behavior. The results show that the precursive and recession times of the flood hydrograph are about 1-3 hours and 3.5-5 hours, respectively.
20
Carmassi, Alberto Luciano, Giulianna Rodrigues Rondineli i Francisco Manoel de Souza Braga. "Fish, Passa Cinco stream, Corumbataí River basin, state of São Paulo, Brazil". Check List 5, nr 1 (1.03.2009): 112. http://dx.doi.org/10.15560/5.1.112.
Pełny tekst źródłaStreszczenie:
The fishes of the present study were collected in Passa Cinco stream, a main river of Corumbataí River basin, Tietê drainage. Five sites were selected in that stream, downstream from headwater to its mouth, and six samplings were performed using the following fishery equipment: a sieve, electric fishery equipment, gill nets and fish-traps. 5082 individuals, 62 species, 18 families and 6 orders were captured. The orders Characiformes and Siluriformes were the most representative and the families Characidae and Loricariidae presented the largest in number of species.
21
Chen, Zhenwei, Ruixia Li i Demei Mao. "Truth Discovery Technology for Mobile Crowd Sensing in Water Quality Monitoring". Wireless Communications and Mobile Computing 2023 (10.07.2023): 1–9. http://dx.doi.org/10.1155/2023/4900238.
Pełny tekst źródłaStreszczenie:
The water quality of urban inland rivers is an important index of urban environmental health, which can reflect a city’s development level and its social and economic development. The water quality of these rivers strongly impacts the health and quality of life of the residents of urban and surrounding areas. Therefore, it is necessary to accurately assess the quality of water in urban inland rivers, which can also aid environmental protection departments in providing river governance. Generally, the water quality status of a city’s inland rivers is assessed and released by environmental monitoring stations in various regions that deploy the corresponding water quality detection equipment at certain major locations of the river. However, these detection devices can only detect water quality at fixed locations, and often, the water quality of an urban inland river changes owing to the impact of the surrounding environment and residents it serves. Therefore, the water quality around a detection point does not always reflect the water quality of the entire river section. To better express the water quality status of a city’s inland river, we propose a method based on a mobile crowd-sensing system that obtains the water quality data of the river during an entire period of time and then fuzes these sensing data to obtain the best truth-value estimate of the water quality of the river. We can use this water quality truth value to conduct an objective evaluation of the water quality of a city’s inland rivers. The water quality parameters obtained by the method can better represent the water quality status of the river, and the data are more accurate compared to the data collected and released by an environmental monitoring station. Through simulation and comparative analysis, we found that the water quality data obtained by the proposed method were more accurate, indicating that our method has more practical value than the detection device method.
22
Budisetyorini, Beta, Deddy Adisudharma, Dicky Arsyul, Wisi Wulandari i Mega Fitriani Adiwarna Prawira. "Rancangan Produk Rekreasi Wisata Memancing Sungai Bogowonto, Kabupaten Purworejo". Jurnal Kepariwisataan: Destinasi, Hospitalitas dan Perjalanan 6, nr 1 (2.08.2022): 119–28. http://dx.doi.org/10.34013/jk.v6i1.651.
Pełny tekst źródłaStreszczenie:
The distribution of tourism potential in Purworejo Regency has been well mapped and must be supported by suitable approach, one of which is the development of river tourism. The actual river tourism activities that have been developed on the Bogowonto River are adventure tourism activities, namely white water rafting. However, the potential of river tourism on Bogowonto River is not only limited for rafting. The development of recreational fishing products on the Bogowonto River can be an opportunity for tourism development in Purworejo Regency. Recreational fishing regarded as a form of tourism activity in accordance with sustainable tourism (Hall, 2019; UNWTO, 2021). This can be seen from the pattern of recreational fishing that does not focus on the number of fish caught, the arrangement of the tools used, as well as the positive impact given to the community on the economic side. The study (Butler et al., 2020) shows that there is a positive contribution of fishing tourism to ecological preservation. From the business side, the Government of Indonesia has regulated fishing tourism businesses (Regulation of the Minister of Tourism of the Republic of Indonesia No. 19 of 2015 concerning Standards for Fishing Tourism Business, 2015), including business arrangements for providing places and facilities for fishing activities using special equipment and safety equipment including the provision of guide services. This study will identify and analyze recreational fishing tourism products based on packages, fishing equipment, fishing tour guides and supporting facilities in the Bogowonto River Area, Purworejo Regency. The long-term goal of this research is to contribute to the design of recreational fishing products for the development of tourist destinations in Purworejo Regency as a guide for stakeholders regarding the utilization of the Bogowonto River
23
Tursunova, Aisulu Alashevna, S. K. Alimkulov, Akhan Bakhytovich Myrzakhmetov, M. A. Kanay, Aizhan Zh Dostaeva i Gulmira Isakan. "Basic hydrographic information about the rivers and temporary watercourses of the Balkash-Alakol basin". Bulletin of the Karaganda University. “Biology, medicine, geography Series” 109, nr 1 (30.03.2023): 195–205. http://dx.doi.org/10.31489/2023bmg1/195-205.
Pełny tekst źródłaStreszczenie:
The article presents basic information about the state of the river network in the Balkash-Alakol basin. They consist of a list of rivers and temporary watercourses from 5 km in mountainous areas and from 10 km in lowland areas, and also include information on their main morphological and morphometric characteristics, which were presented only in the 1970s, after the 1970s such extensive research has not been done. The purpose of the study is to identify rivers and temporary streams, as well as to obtain basic hydrographic information through field surveys and with the help of modern GIS technologies. To achieve the goals, complex field work was carried out using modern hydrological and geodetic equipment and interpretation of space images of Sentinel 1,2 satellites using ArcGIS tools and programs. Each river and temporary watercourse record has a unique feature identifier in the geographic information system. The database is intended for use in regional studies in the field of hydrology, ecology, nature management, and is also an information source for the implementation of measures to monitor and restore rivers, organize water use in transboundary river basins.
24
Hansen, Kurt A. "FASTWATER TECHNIQUES AND EQUIPMENT EVALUATION1". International Oil Spill Conference Proceedings 2001, nr 2 (1.03.2001): 1347–53. http://dx.doi.org/10.7901/2169-3358-2001-2-1347.
Pełny tekst źródłaStreszczenie:
ABSTRACT About 70% of the oil transported on U.S. waterways between 1992 and 1997 were on waterways with currents that routinely exceed one knot. About 58% of all of the oil spilled (by volume) also occurred on these waterways. The U.S. Coast Guard (USCG) Research and Development Center has been evaluating the state-of-the-art of containment and cleanup of oil in currents over 1 knot since 1997. An assessment of techniques and equipment was performed that has led to a series of field demonstrations in the Columbia River, Vineyard Haven, and New York Harbor. Tests on other potential fastwater systems have also taken place at the OHMSETT Facility in New Jersey in 1999 and 2000. The results of the equipment evaluations are presented. The format for a fastwater field guide being prepared is also briefly described. The result will be an increase in the capability of both USCG and commercial firms to respond to spills in fast water.
25
Teal, Andrew R. "INNOVATIVE RESPONSE TECHNIQUES FOR MAJOR RIVER SYSTEMS". International Oil Spill Conference Proceedings 1985, nr 1 (1.02.1985): 173–75. http://dx.doi.org/10.7901/2169-3358-1985-1-173.
Pełny tekst źródłaStreszczenie:
ABSTRACT Spill response in major river systems can be hampered both technically and logistically by river width, current speed, and limitations imposed by equipment and weather. Esso, in response to challenges presented by the Mackenzie River in the Northwest Territories of Canada, developed response systems and techniques to deal with these concerns. These techniques include mid-channel response, anchoring, oil deflection, and oil recovery from under thick ice.
26
Tian, Zhuang, Can Wang i Min Ji. "Full-scale dissolved air flotation (DAF) equipment for emergency treatment of eutrophic water". Water Science and Technology 77, nr 7 (23.02.2018): 1802–9. http://dx.doi.org/10.2166/wst.2018.046.
Pełny tekst źródłaStreszczenie:
Abstract Eutrophication of urban rivers has caused severe environmental problems due to the pollution from point and diffuse sources. Although eutrophication can be alleviated by reducing the input to the river system, fast-treating terminal control technologies, especially under emergent situations, should be developed to reduce risks induced by eutrophication. The present study developed an emergency purification device based on dissolved air flotation (DAF) technology. After equipment commissioning and parameter optimization for applications in the field of engineering, the device was found to effectively remove total phosphorus, chlorophyll a, chemical oxygen demand, and turbidity in water by controlling the coagulant dosage and adjusting the gas-liquid mixing pump parameters. Dissolved air in water could enhance dissolved oxygen, and dissolved oxygen in polluted rivers could be raised from 0.2–2 mg/L to 3–3.5 mg/L. Removal of total nitrogen was poor because the majority of nitrogen contents were dissolved. Finally, DAF has been proven to be a promising technology due to its ease of implementation, low equipment investment requirement, and low operation cost.
27
LaMontagne, Peter, Chuck Clause, Randy Cook i Mike Bailey. "Snake River WWTP's Disposal of Surplus Equipment Profits Buyers and Seller". Proceedings of the Water Environment Federation 2007, nr 17 (1.10.2007): 2238–45. http://dx.doi.org/10.2175/193864707788116095.
Pełny tekst źródła
28
Levashova, A. F. "Mechanical equipment of the Tikhovsk hydro development on the Kuban River". Hydrotechnical Construction 23, nr 10 (październik 1989): 569–72. http://dx.doi.org/10.1007/bf01427973.
Pełny tekst źródła
29
Fogle, Robert F., i Frank M. Heckendorn. "Teleoperated equipment for emergency response applications at the savannah river site". Journal of Robotic Systems 9, nr 2 (marzec 1992): 169–85. http://dx.doi.org/10.1002/rob.4620090205.
Pełny tekst źródła
30
Zeng, Xiang Zhi, Chao Fang Xu i Gang Liu. "Study on the Application of Regional Risk Assessment of Lightning in Electrical Equipment Insulation". Advanced Materials Research 433-440 (styczeń 2012): 1092–98. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.1092.
Pełny tekst źródłaStreszczenie:
With the rapid development of urbanization and the power system, the damages for the power system and electrical equipments which due to lighting strike are increasing. As the distributions of lighting activity are regional and random, the requirements for electrical and electronic equipment, voltage and insulation level are varied from lighting activity in different regions. This paper adopts the Lightning Location Data on the Pearl River Delta in the last 10 years, and uses the method of probability statistics to analyze the regional ground flash density, the probability of lightning strike accident, the damages of the lightning strikes accidents and other risk factors. It takes the topography, regional features, population density and other factors into account, and uses the weighted scores to establish the risk assessment model for the lightning strikes, programs to achieve the automatic calculation in allusion to the risk of lightning strikes in different types of buildings and insulation levels of the electrical and electronic equipment, and assess the risk of lightning strikes on the electrical and electronic equipment. And based on the risk assessment result, it incorporates the installation location, characteristics, importance and other factors to study the electronic equipment withstand voltage and insulation level.
31
Thanh, Tuu Nguyen, Hiep Huynh Van, Hoang Vo Minh i Van Pham Dang Tri. "Salinity Intrusion Trends under the Impacts of Upstream Discharge and Sea Level Rise along the Co Chien River and Hau River in the Vietnamese Mekong Delta". Climate 11, nr 3 (13.03.2023): 66. http://dx.doi.org/10.3390/cli11030066.
Pełny tekst źródłaStreszczenie:
A one-dimensional hydraulic HEC-RAS model was developed to forecast the change in salinity in the tributaries of the Co Chien and Hau Rivers in Tra Vinh province, Vietnam. The boundary data includes river discharge at Can Tho and My Thuan, water levels, and salinity at coastal monitoring stations. Six monitoring stations along the Co Chien River and Hau River were selected to study salinity changes. Four scenarios for the period 2020–2050 were selected, including SLR17, SLR22, SLR26L, and SLR26H, corresponding to sea level rise (17, 22, and 26 cm) and upstream river discharge decrease (in the ranges of 100–128% and 80–117% at Can Tho and My Thuan, respectively) in the dry season based on new climate change scenarios in Vietnam and previous studies. The results highlight that when the average discharge at Can Tho and My Thuan reduces, the salinity increases more significantly than the impact of sea level rise. Salinity at the monitoring stations in Tra Vinh province is projected to increase within the ranges of 4–21% and 3–29% along the Co Chien River and Hau River, respectively. In addition, sea level rise is seen to affect the discharge distribution into the Co Chien River. It suggests an urgent need to raise farmers’ awareness of climate change adaptation, investment in production equipment, and appropriate regulation of riverbed mining and activities upstream in the Mekong River.
32
MacIsaac, D. A., S. Lux, D. Sidders i I. Edwards. "Hotchkiss River Mixedwood Timber Harvesting Study". Forestry Chronicle 75, nr 3 (1.06.1999): 435–38. http://dx.doi.org/10.5558/tfc75435-3.
Pełny tekst źródłaStreszczenie:
The Hotchkiss River Mixedwood Timber Harvesting Study is a cooperative project involving Canadian Forest Service, Daishowa-Marubeni International Ltd., Manning Diversified Forest Products Ltd., the Forest Engineering Research Institute of Canada and Alberta Land and Forest Service aimed at developing new approaches to natural regeneration and harvesting systems for western Canada's boreal mixedwood forests, at a site near the Hotchkiss River in northwestern Alberta. The study used conventional harvesting equipment to test eleven harvesting and silvicultural systems designed to protect and minimize wind damage to immature white spruce residuals and encourage vigorous hardwood regeneration following harvest of the aspen overstory. Research areas include wind damage, wind firmness and growth response of the immature white spruce, effects of harvesting disturbance and timing on soil properties, conifer and hardwood regeneration after harvest, efficiency of equipment and harvesting costs, modelling of wind flow and long-term growth and yield. Already in its sixth year, the project has a planned 20year series of harvests and surveys. Technology transfer is an important component of this study for delivery and promotion of research results on behalf of the proponents and all related research collaborators. Products include demonstration maps and field guides, self-guided tour trails with interpretive signage and field tours (including active operations) as required. Hotchkiss River has also been designated a Forest Ecosystem Research Network (FERN) site. Key words: silviculture systems, white spruce, Picea glauca, aspen, Populus tremuloides, understory protection, harvesting, Alberta, boreal mixedwoods, technology transfer
33
Ekuri, P. E. "Standard Facilities and Equipment as Determinants of High Sports Performance of Cross River State at National Sports Festival". Journal of Public Administration and Governance 8, nr 2 (21.05.2018): 48. http://dx.doi.org/10.5296/jpag.v8i2.13177.
Pełny tekst źródłaStreszczenie:
This study investigates standard facilities and equipment as determinants of high sport performance of Cross River State at National sports festival. The study adopted the descriptive survey research design which includes the Causal-comparative (Ex-post-Facto) method of research. The study population consists of 344 sports personnel and athletes drawn from the sample made up of the state’s sports director and his deputy, coaches, organizers, sport commentators/writers and athletes adopting the multi-stage and stratified random sampling technique. The questionnaire was the instrument used to elicit information from 344 sports personnel and athletes, out of which 270 (78.5%) copies of the questionnaire were duly completed and returned. The data collected were analyzed using frequency count, percentage and chi-square (x2) analysis tested at 0.05 level of significance with the aid of SPSS Version 21. The findings show that sports like athletics, tennis, table tennis, marathon, squash, and swimming have adequate facilities in the state. Sports like judo, boxing, wrestling and weight lifting have adequate facilities only at state headquarters while facilities for taekwondo, volleyball, cricket, badminton, handball, cycling, hockey and basketball are inadequate at both levels. The quality of equipment in Cross River State sports as reveal by the study was very low. Inadequate facilities in the state made significant influence on the performance of Cross River State. Also, inadequate equipment in the state made significant influence on the performance of Cross River State athletes both at National Sports Festivals.
34
Christopherson, Sharon K., i Paul M. Slyman. "OIL SPILL RESPONSE PLANNING ON THE COLUMBIA RIVER ESTUARY". International Oil Spill Conference Proceedings 1993, nr 1 (1.03.1993): 63–66. http://dx.doi.org/10.7901/2169-3358-1993-1-63.
Pełny tekst źródłaStreszczenie:
ABSTRACT The Columbia River Estuary lies along the Washington-Oregon state boundary on the west coast of the United States. The entire area is environmentally very sensitive with numerous large, shallow bays, exposed mud flats, wetland areas, and central channels having maximum currents of three to four knots. These features make the area very difficult to protect from an oil spill. Spill response is further complicated because of the many different state, federal, and local jurisdictions with mandated responsibilities in oil spill response and environmental protection. Under the leadership of the U. S. Coast Guard Marine Safety Office in Portland, Oregon, a steering group was established to guide the development of a response plan for the Columbia River Estuary. A concerted effort was made to include representatives from response organizations, natural resource agencies, and resource users from federal, state, and local governments, and commercial sectors in the planning process. The first draft of an operational response plan was completed the summer of 1992 through a combination of technical workshops, field trips, and small working groups meeting with local communities. The Columbia River Estuary Response Plan prioritizes areas to protect; identifies specific response strategies for protecting these areas; and outlines the logistics needed to implement these strategies, including equipment needs, the location of staging areas, and the identification of pre-designated command posts. The local spill response cooperative and oil transportation industry are using the plan to coordinate the purchase of response equipment and the staging of this equipment at numerous locations along the river. Key to the success of the plan is ensuring that all the groups responding to an event participate in the planning process together. This process has worked well for the Columbia River Estuary and will serve as a model for response planning for other environmentally sensitive areas along the Columbia River and coastal areas of Washington and Oregon.
35
Hamidah, Noor, i Ilham Akbar. "Merancang Museum Sejarah Kota Seribu Sungai di Kota Banjarmasin". JURNAL TEKNIK 15, nr 2 (4.10.2021): 120–29. http://dx.doi.org/10.31849/teknik.v15i2.7462.
Pełny tekst źródłaStreszczenie:
Banjarmasin City is one of the cities located in South Kalimantan Province. The Banjarmasin city area is not only surrounded by small rivers, but also by a large river, namely the Barito River in the west, and is divided by the Martapura River in the middle, so that Banjarmasin City is called the City of a Thousand Rivers. Banjarmasin City is an old city that does not yet have a representative city history museum which is expected to be one of the Indonesian Heritage Cities Network. The design of the Thousand Rivers City History Museum is a building that accommodates the historical knots of the early formation of the City of Banjarmasin and the development of the City of Banjarmasin until now, as well as storing historical objects that have been found, such as heirlooms in the form of kris, sabers, and war equipment and household furniture. before.
The purpose of this paper is to publish the design of the history museum of the city of a thousand rivers in Banjarmasin City with a green architectural approach. The method uses qualitative methods to examine the function and form of the building through literature studies, comparative studies, and precedent studies as well as field observations. The design approach is green architecture by collecting and using data from literature studies. The result of the design is the application of green architectural principles by utilizing climatic conditions, minimizing solar radiation, and good environmental management in historical museum buildings.
36
Nishimura, Naoki, Nobuhiro Usuki, Masaru Touhei, Takahisa Mizuyama i Atsushi Okamoto. "Study on debris flow monitoring in Mt. Fuji". E3S Web of Conferences 415 (2023): 04012. http://dx.doi.org/10.1051/e3sconf/202341504012.
Pełny tekst źródłaStreszczenie:
The Osawa River, which has its headwaters at the top of Mt. Fuji, has one of the largest failure in Japan, the Osawa Failure, in its uppermost part of the catchment. The Osawa Failure produces more than 100,000m3 of sediment every year by erosion and collapse, which causes debris flows and slash avalanches. Since its opening in 1970, the Fuji Sabo Office has been observing the sediment dynamics of the Osawa River through field surveys, observation equipment and aerial photogrammetry, aerial laser survey, and Japanese pipe hydrophone. In 2021, the largest debris flows since the start of observations in the Osawa River occurred twice in March and August. In the March 21 debris flow, 416,000m3 of sediment flowed down from the Osawa Failure, and 482,000m3 was deposited in the alluvial fan. In the August 18 debris flow, 421,000m3 of sediment was deposited in the alluvial fan. Our observations from CCTV cameras, rain gauges, and other equipment installed in the Osawa River indicate that the rainfall characteristics during the two debris flows were different, and that the conditions for debris flows differed depending on the season.
37
Efremov, Denis, Mikhail Skorobogatov i Aleksei Veselov. "Testing of the nest-incubator of chum salmon roe (Oncorhynchus keta W.) in small rivers of the Sakhalin region". Fisheries 2021, nr 5 (8.10.2021): 101–4. http://dx.doi.org/10.37663/0131-6184-2021-5-101-104.
Pełny tekst źródłaStreszczenie:
The result of an extra factory method of reproduction of a chum (Oncorhynchus keta) is presented. The method is tested in small tributaries river Mulka (bass. The Sea of Okhotsk, Strait of Tartary) and in Savushkin's river (bass. Sea of Okhotsk, Second Kuril passage). The original devices representing the flattened container in which in 6 tiers incubatory modules with flutes for caviar are placed are used. The nest allows to incubate during the winter the impregnated caviar of salmon species of fish and to receive the durable larvae which are independently settled in a threshold of the river or forcibly taken from devices in pools in the spring. The device has the increased capacity for the incubated caviar to 10000 berries of a chum on the device, the volume method of loading of caviar in the device is applied, time of equipment and installation of a nest to the river doesn't exceed 15 minutes. In general efficiency of hatching of larvae has made 96%. An exit of larvae has averaged 42,5%. At insignificant completion the device can be used for restoration of number of a chum and other salmon species of fish in the small rivers where factory reproduction is for various reasons unprofitable.
38
Gerardo, Romeu, i Isabel P. de Lima. "Comparing the Capability of Sentinel-2 and Landsat 9 Imagery for Mapping Water and Sandbars in the River Bed of the Lower Tagus River (Portugal)". Remote Sensing 15, nr 7 (3.04.2023): 1927. http://dx.doi.org/10.3390/rs15071927.
Pełny tekst źródłaStreszczenie:
Mapping river beds to identify water and sandbars is a crucial task for understanding the morphology and hydrodynamics of rivers and their ecological conditions. The main difficulties of this task so far have been the limitations of conventional approaches, which are generally costly (e.g., equipment, time- and human resource-demanding) and have poor flexibility to deal with all river conditions. Currently, alternative approaches rely on remote sensing techniques, which offer innovative tools for mapping water bodies in a quick and cost-effective manner based on relevant spectral indices. This study aimed to compare the capability of using imagery from the Sentinel-2 and newly launched Landsat 9 satellite to achieve this goal. For a segment of the Lower Tagus River (Portugal) with conditions of very low river discharge, comparison of the Normalized Difference Water Index, Modified Normalized Difference Water Index, Augmented Normalized Difference Water Index, and Automated Water Extraction Index calculated from the imagery of the two satellites shows that the two satellites’ datasets and mapping were consistent and therefore could be used complementarily. However, the results highlighted the need to classify satellite imagery based on index-specific classification decision values, which is an important factor in the quality of the information extracted.
39
Ma, Liang, Feng Gao i Guang Hui Jiang. "Introduction of a New Reclamation Technology in Mining Subsidence Area by Yellow River Sediment". Applied Mechanics and Materials 295-298 (luty 2013): 1070–74. http://dx.doi.org/10.4028/www.scientific.net/amm.295-298.1070.
Pełny tekst źródłaStreszczenie:
The research introduces a kind of new technology of utilizing sediment from the Yellow River for filling and reclamation of coal mining subsidence area. Through analyzing the water and sediment conditions in downstream of the Yellow River for filling subsidence, detail design on sediment fetching position, scale, method, equipment, pipe and pump station, technical costs assessment and economic benefits analysis are conducted to find a new less cost and big benefit way to comprehensively solve the problems of sediment in the Yellow River and coal mining subsidence land.
40
Banneheka, Sarath G., Richard D. Routledge, Ian C. Guthrie i James C. Woodey. "Estimation of in-river fish passage using a combination of transect and stationary hydroacoustic sampling". Canadian Journal of Fisheries and Aquatic Sciences 52, nr 2 (1.02.1995): 335–43. http://dx.doi.org/10.1139/f95-034.
Pełny tekst źródłaStreszczenie:
We describe a hydroacoustic technique that uses both transect and stationary sampling to estimate numbers of fish migrating in a river. The technique includes refinements and additions to one developed by the International Pacific Salmon Fisheries Commission to estimate sockeye (Oncorhynchus nerka) and pink salmon (Oncorhynchus gorbuscha) migrations in the Fraser River. The estimator is independent of the actual shape of the effective acoustic beam and the distribution of target strengths when the same hydroacoustic equipment and settings are used for both types of soundings. Thus, the method shares with the duration-in-beam method the advantages that equipment calibration requirements are minimal and that estimates remain valid when fish sizes vary over a wide range. We also provide formulae for the variance of the abundance estimate and illustrate the methods with example calculations of daily fish passage in the Fraser River at Mission, British Columbia. A correction procedure is proposed to compensate for bias arising from violation of the assumption that fish speed is negligible relative to boat speed.
41
Gomiero, LM, i FMS Braga. "Reproduction of a fish assemblage in the state of São Paulo, southeastern Brazil". Brazilian Journal of Biology 67, nr 2 (maj 2007): 283–92. http://dx.doi.org/10.1590/s1519-69842007000200013.
Pełny tekst źródłaStreszczenie:
Fish reproductions were studied in two river basins (Corumbataí and Jacaré-Pepira basins) in the State of São Paulo, southeastern Brazil. In the Corumbataí basin, four sites were sampled: Cabeça River, Lapa Stream, Passa-Cinco River, and Corumbataí River; in the Jacaré-Pepira basin, three sites were sampled: Tamanduá Stream, Jacaré-Pepira River, and Água Branca Stream. A total of 12 bimonthly samples were made. Fish equipment included gill nets, purse seines, sieves, and traps. The main objective of this study was to characterize the fish assemblage regarding their reproductive biology and to compare these reproductive traits between both river basins. Most individuals with gonads in stage C (mature) and in stage D (empty gonads) were captured in the spring and summer. Multiple spawn and parental care were common strategies, which guaranteed offspring survivorship in unstable conditions.
42
Son, M. O., R. A. Novitsky i V. G. Dyadichko. "Recent State and Mechanisms of Invasions of Exotic Decapods in Ukrainian Rivers". Vestnik Zoologii 47, nr 1 (1.02.2013): 45–50. http://dx.doi.org/10.2478/vzoo-2013-0004.
Pełny tekst źródłaStreszczenie:
Abstract Lower reaches of largest Ukrainian rivers are zones of migrations for exotic euryhaline decapods. During 2000s new records of invasions of three euryhaline exotic decapods, Rhithropanopeus harrisii (Gould, 1841), Eriocheir sinensis Milne-Edwards, 1853 and Macrobrachium nipponense (De Haan, 1849), were made in the channels of Ukrainian rivers. Chinese mitten crab, E. sinensis, spread in the Danube Delta and reservoirs of the Dnieper River; Rh. harrisii - in the channels of the Danube, Dnieper, Southern Bug and small river Gruzskij Yelanchik in the Azov Sea Basin; M. nipponense that was introduced in the Kuchurgan Liman (cooler reservoir of the Moldavian Hydro-power Station) - in the Dniester Delta. The migration zone of the established population can cover significant part of river watershed; it is necessary to take this fact into account at an estimation of biological invasion risk. Main problem in the investigation of exotic decapods in Ukrainian waters is absence of specialized methods used in the standard ecological monitoring. Among euryhaline exotic decapods, only Rh. harrisii is sometimes sampled with the equipment used in the monitoring of macrozoobenthos. A few records of these species at the large extent of their supposed ways of migration are the result of gaps in the study of their distribution in Ukrainian inland waters. Realistic attitude toward this fact is very important for the estimation of invasions in the inland waters of this region.
43
bin Din, Abdul Talib, V. K. Kher i Chee Fai Tan. "Conceptual Design of Mini Cost-Saving Water Treatment Plant for River Inlets". Applied Mechanics and Materials 521 (luty 2014): 762–74. http://dx.doi.org/10.4028/www.scientific.net/amm.521.762.
Pełny tekst źródłaStreszczenie:
This product is specially designed to solve the current typical river pollution by tackling the pollution at the river inlets' stage. It is equipped with all conventional water treatment technologies with innovative energy cost-saving technique using gravity and buoyancy forces. The product is functional in term of saving the environment, particularly river and its flora and fauna and in saving the energy that normally used in operating the motorized processing equipment as normally used in current product in the market. The free and readily available gravity and buoyancy forces of water are manipulated efficiently to save the energy cost.
44
Ojha, Sakunda. "Rehabilitation of Sunkoshi Small Hydropower Plant (2.6 MK), Nepal after Sequences of Natural Disaster". International Journal of Engineering Technology and Sciences 5, nr 2 (1.08.2018): 75–90. http://dx.doi.org/10.15282/ijets.v5i2.1398.
Pełny tekst źródłaStreszczenie:
Sunkoshi Small Hydropower Plant (SSHP) is a run-of-river type project constructed in Sunkoshi River located in Sindhupalchowk District of Bagmati zone of Central Development Region, Nepal. The plant started its commercial operation since March 2005. During the year 2014, 2015 and 2016 the plant faced series of natural disaster events; landslide at Jure village on 2 August 2014, earthquake (7.8 magnitude) on 25 April 2015, landslide dammed flood in Sunkoshi River on 11 August 2015 and Glacier Lake Outburst Flood (GLOF) in Sunkoshi River on 5 July 2016. The Jure landslide created 55 m dam across Sunkoshi River. Thus created landslide dammed lake inundated the powerhouse of SSHP for 36 days. About seven million cubic meters of water was reserved in the lake. The event damaged entire powerhouse building, Electromechanical Equipment (EM), tailrace culvert, portion of steel penstock pipe and staff quarter. The rehabilitation works after Jure landslides included strengthening of powerhouse building and tailrace culvert, winding of generators, replacement of electromechanical equipment and portion of penstock pipe and change of transmission line alignment. On 25 April 2015, most of the rehabilitation works were completed. The EM experts were conducting a wet test for power generation when the power-plant was hit by other natural disaster - earthquake of 7.8 Rector Scale. The earthquake and its aftershocks followed by landslide dammed outburst flood of 11 August 2015 damaged headworks structures - formed a cavern of 56.6 m3 below gravel trap, collapsed entire powerhouse building and damaged newly installed electromechanical equipment, created several landslides along water way alignment and damaged about 900 m of penstock alignment. Some innovations in designs were introduced such as construction of sliding type saddle supports, bio-engineering combined with civil engineering structures to stabilize landslides, retrofitting of powerhouse building, use of crackamite and rock drill and avoidance of heavy masonry wall and gable wall in powerhouse. After rehabilitation works, the power plant re-operated since 4 January 2016 - after about 18 months. However, the plant was again affected by a Glacier Lake Outburst Flood (GLOF) in Botekoshi River on 5 July 2016.
45
Falkiewicz, Fernando Henrique. "Oil Spill in the Iguassu River – Araucaria, Parana, Brazil Cleaning and Restoration of Rivers and Inundation Areas". International Oil Spill Conference Proceedings 2003, nr 1 (1.04.2003): 643–48. http://dx.doi.org/10.7901/2169-3358-2003-1-643.
Pełny tekst źródłaStreszczenie:
ABSTRACT On July 16, 2000 a major oil spill occurred at the side of the Araucaria refinery of Petrobras. A total of 4,000 m3 of a light crude oil (41° API) ran down along a small two kilometers creek referred to as Arroio Saldanha, crossing and contaminating a series of four wetlands. The oil discharged into the Barigüi River, a tributary of the Iguassu River. It's estimated that twenty per cent of all the oil spilled volatilized. After running along the creek and its wetlands, the oil contaminated 6 kilometers of the Barigüi River and 60 kilometers of the Iguassu River. A comprehensive oil recovery emergency response operation was immediately engaged to clean the impacted area and the rivers. Some 3000 persons worked around the clock during the peak of the operations. Helicopters, trucks, oil recovering boats, light boats, mechanical excavators, dredgers and 3,200 meters of retention booms were used. Roads and accesses were reformed or built. The overall emergency response effort proved to be successful; in nine days, all of the free oil was removed from the rivers. The cleaning of the riverbanks and inundation areas was completed in three months. The Saldanha Creek and the four wetlands areas upgradient of the Barigüi River retained approximately 70 per cent of all of the oil spilled, all superficial oil was removed until it could not move superficially, the remaining oil impregnated in the upper soil profiles. Since then, various remediation techniques were implemented to remediate both, soil surface water and groundwater. The upper portion of the soil profile is remediated with bioremediation, using natural indigenous microorganism. This technique consists in cultivating the soil with mechanical agricultural equipment or manually where accessibility does not allow the use of mechanical equipment. Nutrients and other amendments can be added when required. In some cases soil are bioaugmented with microorganisms of the “landfarming” cells of the refinery. This technique is a variant of the landfarming technique that has been studied at the Repar (Refinaria Presidente Getúlio Vargas) refinery for more than ten years. Such technique has proven to be more efficient than traditional landfarming. The soil below 40 centimeters cannot be remediated with this technique. Soils at such depth are being recovered through a series of drainage and injection trenches. Water injected in the injection trench forces the free and trapped oil to move laterally to the recovery trenches. The largest contaminated swamp was transformed in a treatment wetland and its recovery is being monitored and adjusted to quicken the recovering, thus minimizing interference with the natural ecosystem.
46
OHYAMA, Takuya, i Hiroyasu ISHIKAWA. "ICONE23-2152 DEVELOPMENT OF EQUIPMENT FOR MIGRATION CONTROL OF RADIOACTIVE CESIUM ABSORBED IN SUSPENDED SOLID IN THE RIVER WATER". Proceedings of the International Conference on Nuclear Engineering (ICONE) 2015.23 (2015): _ICONE23–2—_ICONE23–2. http://dx.doi.org/10.1299/jsmeicone.2015.23._icone23-2_59.
Pełny tekst źródła
47
Fulton, John W., Isaac E. Anderson, C. L. Chiu, Wolfram Sommer, Josip D. Adams, Tommaso Moramarco, David M. Bjerklie i in. "QCam: sUAS-Based Doppler Radar for Measuring River Discharge". Remote Sensing 12, nr 20 (12.10.2020): 3317. http://dx.doi.org/10.3390/rs12203317.
Pełny tekst źródłaStreszczenie:
The U.S. Geological Survey is actively investigating remote sensing of surface velocity and river discharge (discharge) from satellite-, high altitude-, small, unmanned aircraft systems- (sUAS or drone), and permanent (fixed) deployments. This initiative is important in ungaged basins and river reaches that lack the infrastructure to deploy conventional streamgaging equipment. By coupling alternative discharge algorithms with sensors capable of measuring surface velocity, streamgage networks can be established in regions where data collection was previously impractical or impossible. To differentiate from satellite or high-altitude platforms, near-field remote sensing is conducted from sUAS or fixed platforms. QCam is a Doppler (velocity) radar mounted and integrated on a 3DR© Solo sUAS. It measures the along-track surface velocity by spot dwelling in a river cross section at a vertical where the maximum surface velocity is recorded. The surface velocity is translated to a mean-channel (mean) velocity using the probability concept (PC), and discharge is computed using the PC-derived mean velocity and cross-sectional area. Factors including surface-scatterer quality, flight altitude, propwash, wind drift, and sample duration may affect the radar-returns and the subsequent computation of mean velocity and river discharge. To evaluate the extensibility of the method, five science flights were conducted on four rivers of varying size and dynamics and included the Arkansas River, Colorado (CO), USA (two events); Salcha River near Salchaket, Alaska (AK), USA; South Platte River, CO, USA; and the Tanana River, AK, USA. QCam surface velocities and river discharges were compared to conventional streamgaging methods, which represented truth. QCam surface velocities for the Arkansas River, Salcha River, South Platte River, and Tanana River were 1.02 meters per second (m/s) and 1.43 m/s; 1.58 m/s; 0.90 m/s; and 2.17 m/s, respectively. QCam discharges (and percent differences) were 9.48 (0.3%) and 20.3 cubic meters per second (m3/s) (2.5%); 62.1 m3/s (−10.4%); 3.42 m3/s (7.3%), and 1579 m3/s (−18.8%). QCam results compare favorably with conventional streamgaging and are a viable near-field remote sensing technology that can be operationalized to deliver real-time surface velocity, mean velocity, and river discharge, if cross-sectional area is available.
48
Kim, Jong-Gyeum. "Consideration on Construction of Run of River Type Micro Hydroelectric Power Generation Equipment". TRANSACTION OF THE KOREAN INSTITUTE OF ELECTRICAL ENGINEERS P 71, nr 1 (31.03.2022): 48–53. http://dx.doi.org/10.5370/kieep.2022.71.1.48.
Pełny tekst źródła
49
Ukwayi, Ukwayi, J. K. Okpa, J. T. Adewoyin, S. A. Angioha i P. U. Udom. "Security Equipment and Policing in Central Senatorial District of Cross River State, Nigeria". IOSR Journal of Humanities and Social Science 22, nr 2 (luty 2017): 06–14. http://dx.doi.org/10.9790/0837-2202050614.
Pełny tekst źródła
50
Kuznetsov, A., i S. Ivanchik. "Flaw detection of ship equipment parts". Journal of Physics: Conference Series 2131, nr 5 (1.12.2021): 052059. http://dx.doi.org/10.1088/1742-6596/2131/5/052059.
Pełny tekst źródłaStreszczenie:
Abstract The need for non-destructive testing is regulated by the rules of the Russian River Register, which can determine the choice of the method of non-destructive testing and the procedure for its implementation. Non-destructive testing methods used in naval mechanical engineering are: visual and measuring control, ultrasonic control, radiographic control, capillary control, magnetic control, eddy current control. Each of the methods, due to the difference in the implemented physical principles, has its own advantages and disadvantages, which impose restrictions on the flaw detection of parts. The analysis of the sculpted defects of ship equipment and machines, depending on the manufacturing method and operating conditions, was carried out. The limitations on the use of non-destructive testing methods are shown. Examples of non-flaw detective parts are given, the control of which is difficult, as well as flaw detective parts that can be controlled with a guaranteed condition for detecting defects. The advantage of the method of magnetic memory of metal is indicated, relative to other methods of non-destructive testing. Using the example of a piston pin of a marine diesel engine NVD 36, a comparative analysis of the applicability of ultrasonic testing methods, the magnetic memory method and the penetrating solutions method for detecting fatigue cracks was performed. The results of the control show that the applied methods confidently identify fatigue cracks in the controlled parts, machines and mechanisms of ship equipment.