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Artykuły w czasopismach na temat „SYNTHETIC POLLUTION INDEX (SPI)”

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Data publikacji: 11 września 2023

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1

Grema, H. M., H. Hamidu, A. Suleiman, A. I. Kankara, A. O. Umaru, and N. F. Abdulmalik. "Cadmium geochemistry and groundwater pollution status evaluation using indexing and spatial analysis for Keffe community and Environs Sokoto Basin, North Western Nigeria." Nigerian Journal of Basic and Applied Sciences 30, no. 1 (2022): 05–23. http://dx.doi.org/10.4314/njbas.v30i1.2.

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Representative groundwater samples were collected from the Kaffe community and environs to evaluate the concentrations and geochemical constraints for mobilizing cadmium (Cd) and selected heavy metals. Field-based in-situ measurements of physicochemical parameters were combined with Atomic Absorption Spectrophotometer analysis of dissolved elemental concentrations. Pollution indices (i.e. heavy metal pollution index; HPI, heavy metal evaluation index; HEI, contamination degree; Cd, metal index; MI, synthetic pollution index; SPI, ecological risk index; ERI and Nemerow index; NI) evaluations hi

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Hui, Tian, Jizhong Du, Qifa Sun, Qiang Liu, Zhuang Kang, and Hongtao Jin. "Using the Water Quality Index (WQI), and the Synthetic Pollution Index (SPI) to Evaluate the Groundwater Quality for Drinking Purpose in Hailun, China." Sains Malaysiana 49, no. 10 (2020): 2383–401. http://dx.doi.org/10.17576/jsm-2020-4910-05.

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Solangi, Ghulam Shabir, Altaf Ali Siyal, Muhammad Munir Babar, and Pirah Siyal. "Evaluation of drinking water quality using the water quality index (WQI), the synthetic pollution index (SPI) and geospatial tools in Thatta district, Pakistan." DESALINATION AND WATER TREATMENT 160 (2019): 202–13. http://dx.doi.org/10.5004/dwt.2019.24241.

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Hui, Tian, Liang Xiujuan, Sun Qifa, Liu Qiang, Kang Zhuang, and Gong Yan. "Evaluation of Drinking Water Quality Using the Water Quality Index (WQI), the Synthetic Pollution Index (SPI) and Geospatial Tools in Lianhuashan District, China." Polish Journal of Environmental Studies 30, no. 1 (2020): 141–53. http://dx.doi.org/10.15244/pjoes/120765.

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Solangi, Ghulam Shabir, Altaf Ali Siyal, Muhammad Munir Babar, and Pirah Siyal. "Groundwater quality evaluation using the water quality index (WQI), the synthetic pollution index (SPI), and geospatial tools: a case study of Sujawal district, Pakistan." Human and Ecological Risk Assessment: An International Journal 26, no. 6 (2019): 1529–49. http://dx.doi.org/10.1080/10807039.2019.1588099.

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Solangi, Ghulam Shabir, Altaf Ali Siyal, Muhammad Munir Babar, and Pirah Siyal. "Evaluation of surface water quality using the water quality index (WQI) and the synthetic pollution index (SPI): a case study of Indus Delta region of Pakistan." DESALINATION AND WATER TREATMENT 118 (2018): 39–48. http://dx.doi.org/10.5004/dwt.2018.22407.

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Nhu Tam, Doan Ngoc. "APPLICATION OF PRINCIPLE COMPONENT ANALYSIS TO BUILD PROVINCIAL ECO-EFFICIENCY INDEX FOR BINH DUONG PROVINCE FROM 2001-2012." Vietnam Journal of Science and Technology 54, no. 2A (2018): 251. http://dx.doi.org/10.15625/2525-2518/54/2a/11938.

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Based on a proposed concept of Regional Eco-Efficiency of Zhou Zhenfeng, a set of indicators for assessing, eco-efficiency of provincial level has been conducted. Set of indicators included 26 indicators, and was divided into 3 groups: Socio-Economic Development Index (SDI) (9 indicators); Resources Consumption Index (RCI) (7 indicators) and Environmental Pressure index (EPrI) (10 indicators). Principle component analysis (PCA) was used to assess Eco-efficiency Synthetic Index (ESI) of Binh Duong province in the 2001-2012. Results shown that the ESI of Binh Duong province has been clearly impr

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8

Bedolla-Rivera, Héctor Iván, Eloy Conde-Barajas, Sandra Lizeth Galván-Díaz, Francisco Paúl Gámez-Vázquez, Dioselina Álvarez-Bernal, and María de la Luz Xochilt Negrete-Rodríguez. "Compost Quality Indexes (CQIs) of Biosolids Using Physicochemical, Biological and Ecophysiological Indicators: C and N Mineralization Dynamics." Agronomy 12, no. 10 (2022): 2290. http://dx.doi.org/10.3390/agronomy12102290.

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The increasing production of biosolids (BS) as a result of urban wastewater treatment generates pollution problems in their management and final disposal, and a better management is needed for their disposal. The composting of BS is an alternative process for obtaining a product with potential application as an organic amendment in the recovery of agricultural soils. As a biotechnological contribution, this study analyzed a composting process with BS, bovine manure (BM) and rice husks using four treatments T1 (C/N = 24); T2 (C/N = 34); T3 (C/N = 44); T4 (C/N = 54) for 120 days, in order to dev

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9

Sur, Chanyang, Dongkyun Kim, Joo-Heon Lee, Muhammad Mazhar Iqbal, and Minha Choi. "Hydrological Drought Assessment of Energy-Based Water Deficit Index (EWDI) at Different Geographical Regions." Advances in Meteorology 2019 (May 29, 2019): 1–11. http://dx.doi.org/10.1155/2019/8512727.

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This study applied the remote sensing-based drought index, namely, the Energy-Based Water Deficit Index (EWDI), across Mongolia, Australia, and Korean Peninsula for the period between 2000 and 2010. The EWDI is estimated based on the hydrometeorological variables such as evapotranspiration, soil moisture, solar radiation, and vegetation activity which are derived from the Moderate Resolution Imaging Spectroradiometer (MODIS) imageries. The estimated EWDI was compared with the Evaporative Stress Index (ESI), the Vegetation Condition Index (VCI), and the Standardized Precipitation Index (SPI). T

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10

Kim, Young-Sik, Gi-Sun Kim, and Mi-Ra Song. "A Study on SPI(soil pollution index) in City Land." Korean Journal of Environmental Health Sciences 33, no. 6 (2007): 502–5. http://dx.doi.org/10.5668/jehs.2007.33.6.502.

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11

Abeysingha, N. S., and U. R. L. N. Rajapaksha. "SPI-Based Spatiotemporal Drought over Sri Lanka." Advances in Meteorology 2020 (January 21, 2020): 1–10. http://dx.doi.org/10.1155/2020/9753279.

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Drought is one of the most significant hazards in Sri Lanka. Status of drought in Sri Lanka was assessed using Standardized Precipitation Index (SPI) at 3, 6, and 12 months’ time scales using monthly rainfall (1970 to 2017) data of 54 weather stations. The frequency of drought events was evaluated using SPI, and trend of SPI was also detected using the Mann–Kendall (MK) test and Sen’s slope estimator. The result based on SPI identified hydrological years 1975-76, 1982-83, 1986-87, 1988-89, 2000-01, 2001-02, 2013-14, and 2016-17 as drought years for 52, 32, 35, 33, 33, 31, 31, and 31% of tested

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C., Kougblenou, Atinkpahoun C., Saizonou M., Youssao A., and Soclo H. "STUDY OF CONTAMINATION BY METALLIC ELEMENTS IN COASTAL SEDIMENTS: CASE OF THE COTONOU CHANNEL." International Journal Of Advanced Research 10, no. 04 (2022): 157–67. http://dx.doi.org/10.21474/ijar01/14529.

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Coastal aquatic ecosystems are environments increasingly affected by human activities due to urban discharges and their use as dumps. The objective of this study is to determine the profiles of metallic elements concentration (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Cd, and Pb) of Cotonou channel sediments and to evaluate their quality. For this, surface sediments (0-5cm) were sampled at 13 sites along the channel. Thus,Geoaccumulation Index (Igeo), Enrichment Factor (EF) and Sediment Pollution Index (SPI) were calculated to assess the chemical quality of these sediments. The metal contents of the

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13

Penconek, Agata, Dorota Kasak, and Arkadiusz Moskal. "Soy Protein Nanofibers Obtained by Solution Blow Spinning." Processes 11, no. 8 (2023): 2310. http://dx.doi.org/10.3390/pr11082310.

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The climate crisis, growing pollution of the environment with waste, and ubiquitous microplastics have encouraged the search for new methods and new opportunities to use natural materials in the least harmful processes. Replacing synthetic materials with raw materials is not only a matter of “fashion”, but also a necessity. Therefore, this study aimed to produce fibers from an aqueous solution containing the highest possible concentration of soy protein isolate (SPI) through solution-blowing. As the aqueous solution of SPI has no fiber-forming potential, polyethylene oxide (PEO) was used as th

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14

Addi, Martin, Kofi Asare, Samuel Kofi Fosuhene, Theophilus Ansah-Narh, Kenneth Aidoo, and Comfort Gyasiwaa Botchway. "Impact of Large-Scale Climate Indices on Meteorological Drought of Coastal Ghana." Advances in Meteorology 2021 (February 3, 2021): 1–17. http://dx.doi.org/10.1155/2021/8899645.

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The devastating effects of drought on agriculture, water resources, and other socioeconomic activities have severe consequences on food security and water resource management. Understanding the mechanism that drives drought and predicting its variability is important for enhancing early warning and disaster risk management. In this study, meteorological droughts over six coastal synoptic stations were investigated using three-month Standardized Precipitation Index (SPI). The dry seasons of November-December-January (NDJ), December-January-February (DJF), and January-February-March (JFM) were t

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15

Makumbura, Randika K., and Upaka Rathnayake. "Variation of Leaf Area Index (LAI) under Changing Climate: Kadolkele Mangrove Forest, Sri Lanka." Advances in Meteorology 2022 (October 10, 2022): 1–10. http://dx.doi.org/10.1155/2022/9693303.

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Mangroves are an essential plant community in coastal ecosystems. While the importance of mangrove ecosystems is well acknowledged, climate change is expected to have a considerable negative impact on them, especially in terms of temperature, precipitation, sea level rise (SLR), ocean currents, and increasing storminess. Sri Lanka ranks near the bottom of the list of countries researching this problem, even though the scientific community's interest in examining the variation in mangrove health in response to climate change has gained significant attention. Consequently, this study illustrates

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16

Zhong, Fanglei, Qingping Cheng, and Ping Wang. "Meteorological Drought, Hydrological Drought, and NDVI in the Heihe River Basin, Northwest China: Evolution and Propagation." Advances in Meteorology 2020 (June 9, 2020): 1–26. http://dx.doi.org/10.1155/2020/2409068.

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Understanding the evolution and propagation of different drought types is crucial to reduce drought hazards in arid and semiarid regions. Here, Standardized Precipitation Index (SPI), Streamflow Drought Index (SDI), and Vegetation Condition Index (VCI) were used to investigate the spatiotemporal variation of different drought types and correlations between Pre (Pre-R)/post (Pos-R)-reservoir. Results showed that the average peak/intensity/duration/severity of meteorological droughts (MD) were greater in the Pre-R than in the Pos-R period in the upstream Heihe River Basin (UHRB), while there was

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17

Zhao, Xiao Qing, Hong Hui Yang, and Jian Chen. "Evaluation on Characteristics of Heavy Metal Spatial Pollution in Farmland Soils along the Bijiang River." Applied Mechanics and Materials 295-298 (February 2013): 1586–93. http://dx.doi.org/10.4028/www.scientific.net/amm.295-298.1586.

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Based on the farmland soils along the Bijiang River, a main tributary of the international Lantsang-Mekong River flowing through the Jinding Lead-Zinc Deposit, this dissertation makes analyses on the pollution characteristics of spatial variation in farmland soils by adopting the soil sampling and testing analysis and applying single-factor pollution index (SPI) evaluation and Nemerow composite pollution index (NCPI) evaluation. The results indicate that: (1) In accordance with Environmental Quality Standard for Soils (II), the content of Cd contained in the farmland soils has severely exceede

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18

Abera Tareke, Kassa, and Admasu Gebeyehu Awoke. "Hydrological and Meteorological Drought Monitoring and Trend Analysis in Abbay River Basin, Ethiopia." Advances in Meteorology 2022 (November 28, 2022): 1–18. http://dx.doi.org/10.1155/2022/2048077.

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The definition of drought is very controversial due to its multi-dimensional impact and slow propagation in onset and end. Predicting the accurate occurrence of drought remains a challenging task for researchers. The study focused on hydrological and meteorological drought monitoring and trend analysis in the Abbay river basin, using the streamflow drought index (SDI), standardized precipitation index (SPI), and reconnaissance drought index (RDI), respectively, to fill this research gap. The study also looked into the interrelationships between the two drought indicators. The SDI, SPI, and RDI

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19

Sabau, Nicu Cornel, Teodor Eugen Man, Andrei Armas, Ciprian Balaj, and Mariana Giru. "CHARACTERIZATION OF AGRICULTURAL DROUGHTS USING STANDARDIZED PRECIPITATION INDEX (SPI) AND BHALME-MOOLEY DROUGHT INDEX (BDMI)." Environmental Engineering and Management Journal 14, no. 6 (2015): 1441–54. http://dx.doi.org/10.30638/eemj.2015.156.

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20

Xie, Jian Jun, Na Li, and Nian Zeng. "Preparation and its Properties of the Urea Modified Soy Protein Isolate Adhesives." Advanced Materials Research 580 (October 2012): 481–84. http://dx.doi.org/10.4028/www.scientific.net/amr.580.481.

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Soy proteins have shown great potential for use as renewable and environmentally friendly adhesives. The orthogonal experiments are designed for the urea-modified soy protein isolate(SPI) adhesives and the optimum formula is obtained. The mass concentrations of SPI and urea are 14% and 8%(relative to the total mass of SPI and water), the reaction temperature and time are 35°C and 60 min, respectively. Some basic and adhesion properties and its structure of the modified SPI adhesive for the optimum formula are measured. The viscosity is 43Pa.s, and the dry- and wet-state adhesion strengths of t

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21

Shalishe, Amba, Anirudh Bhowmick, and Kumneger Elias. "Meteorological Drought Monitoring Based on Satellite CHIRPS Product over Gamo Zone, Southern Ethiopia." Advances in Meteorology 2022 (June 28, 2022): 1–13. http://dx.doi.org/10.1155/2022/9323263.

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Drought is a frequent occurrence in semidesert areas of southern Ethiopia that significantly affect regional, social, economic, and environmental conditions. Lack of rainfall monitoring network, instrument measurement, and failure are major bottlenecks for agro-and hydroclimate research in developing countries. The objectives of this study were to evaluate the performance of CHIRPS rainfall product and to assess meteorological drought using SPI for the period 2000 to 2020 over Gamo Zone, southern Ethiopia. The performance of CHIRPS v2 was assessed and compared to station observations (2000–202

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22

Lyon, Bradfield, Michael A. Bell, Michael K. Tippett, et al. "Baseline Probabilities for the Seasonal Prediction of Meteorological Drought." Journal of Applied Meteorology and Climatology 51, no. 7 (2012): 1222–37. http://dx.doi.org/10.1175/jamc-d-11-0132.1.

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AbstractThe inherent persistence characteristics of various drought indicators are quantified to extract predictive information that can improve drought early warning. Predictive skill is evaluated as a function of the seasonal cycle for regions within North America. The study serves to establish a set of baseline probabilities for drought across multiple indicators amenable to direct comparison with drought indicator forecast probabilities obtained when incorporating dynamical climate model forecasts. The emphasis is on the standardized precipitation index (SPI), but the method can easily be

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Chen, Rui, Lei Han, Zhao Liu, et al. "Assessment of Soil-Heavy Metal Pollution and the Health Risks in a Mining Area from Southern Shaanxi Province, China." Toxics 10, no. 7 (2022): 385. http://dx.doi.org/10.3390/toxics10070385.

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Soil-heavy metal pollution in mining areas is one of the problems in the comprehensive treatment of soil environmental pollution. To explore the degree of soil-heavy metal pollution and the human health risk in mining areas, the contents of soil As, Cd, Cu, Cr, Hg, Ni, Pb, and Cr(VI) in an abandoned gold mining area were determined. The geoaccumulation index (Igeo), single-factor pollution index (SPI), Nemerow comprehensive pollution index (NCPI), potential ecological risk index (PERI), and the human health risk assessment model were used to assess the pollution degree and the risk of soil-hea

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Abed, Mahmood F., Ghazi Atiya Zarraq, and Salwa H. Ahmed. "Assessment of Groundwater Pollution using Aqueous Geo-Environmental Indices, Baiji Province, Salah Al-Din, Iraq." Iraqi Geological Journal 55, no. 1B (2022): 94–104. http://dx.doi.org/10.46717/igj.55.1b.9ms-2022-02-25.

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The study area is located in Baiji province characterized by anthropogenic activities which may affect the groundwater quality. Therefore, the present work was intended for assessing groundwater quality and its suitability for drinking. Groundwater samples were collected from 33 different well, then analyzed to determine 20 parameter which are TDS, Ca, Mg, Na, K, Cl, SO4, NO3, Al, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Zn, As, B and Se. Nemerow Pollution Index Synthetic Pollution Index, and Pollution Index of Groundwater were used for determining groundwater suitability for human consumption. Nemerow Pol

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25

Sepulcre-Canto, G., S. Horion, A. Singleton, H. Carrao, and J. Vogt. "Development of a Combined Drought Indicator to detect agricultural drought in Europe." Natural Hazards and Earth System Sciences 12, no. 11 (2012): 3519–31. http://dx.doi.org/10.5194/nhess-12-3519-2012.

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Abstract. This study proposes a drought indicator that combines the Standardized Precipitation Index (SPI), the anomalies of soil moisture and the anomalies of the fraction of Absorbed Photosynthetically Active Radiation (fAPAR). Computed at the European level, the Combined Drought Indicator (CDI) gives a synthetic and synoptic overview of the drought situation using a classification scheme. Derived from the integration of the three individual indices, this classification scheme is composed of three warning levels: "watch" when a relevant precipitation shortage is observed, "warning" when this

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Hinis, Mehmet Ali, and Mehmet Selim Geyikli. "Accuracy Evaluation of Standardized Precipitation Index (SPI) Estimation under Conventional Assumption in Yeşilırmak, Kızılırmak, and Konya Closed Basins, Turkey." Advances in Meteorology 2023 (April 17, 2023): 1–13. http://dx.doi.org/10.1155/2023/5142965.

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The doubt in the calculation algorithm of the standardized precipitation index (SPI), which is widely preferred in the evaluation and monitoring of drought, still remains up-to-date because its calculation process is performed in the form of standardization or normalization with a default probability distribution. Therefore, the success of this index is directly affected by the choice of the probability distribution model. This study is based on the effect of three different parameter estimation methods on the calculation process, as well as the comparison of the SPI results calculated based o

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Zhang, Yuhu, Wanyuan Cai, Qiuhua Chen, Yunjun Yao, and Kaili Liu. "Analysis of Changes in Precipitation and Drought in Aksu River Basin, Northwest China." Advances in Meteorology 2015 (2015): 1–15. http://dx.doi.org/10.1155/2015/215840.

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The analysis of the spatiotemporal trends of precipitation and drought is relevant for the future development and sustainable management of water resources in a given region. In this study, precipitation and Standardized Precipitation Index (SPI) trends were analyzed through applying linear regression, Mann–Kendall, and Spearman’s Rho tests at the 5% significance level. For this goal, meteorological data from 9 meteorological stations in and around Aksu Basin during the period 1960–2010 was used, and two main annual drought periods were detected (1978-1979 and 1983–1986), while the extremely d

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Sahli, Leila, Fatima-Zohra Afri-Mehennaoui, Mohamed El Hadef El Okki, Jean François Férard, and Smail Mehennaoui. "Assessment of sediment quality and pore water ecotoxicity in Kebir Rhumel basin (NE-Algeria): a combined approach." Water Science and Technology 65, no. 2 (2012): 393–401. http://dx.doi.org/10.2166/wst.2012.802.

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The objectives of this study are to use different approaches to assess the current pollution status in the wadis of the Kebir Rhumel basin. First, sediment trace metal contents were measured by flame atomic absorption spectroscopy. Then, sediment quality was assessed on the basis of contamination assessment indexes such as: Geoaccumulation Index (Igeo), Contamination factor (Cf), Contamination degree (Cd), Sediment Pollution Index (SPI) and SEQ guidelines (Consensus Sediment Quality Guidelines). In addition, several toxicity tests (Daphnia magna mobility inhibition acute test-48 h, Aliivibrio

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Won, Jeongeun, Jeonghyeon Choi, Okjeong Lee, and Sangdan Kim. "Copula-based Joint Drought Index using SPI and EDDI and its application to climate change." Science of The Total Environment 744 (November 2020): 140701. http://dx.doi.org/10.1016/j.scitotenv.2020.140701.

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Ye, Xu-chun, Yun-liang Li, Xiang-hu Li, Chong-yu Xu, and Qi Zhang. "Investigation of the Variability and Implications of Meteorological Dry/Wet Conditions in the Poyang Lake Catchment, China, during the Period 1960–2010." Advances in Meteorology 2015 (2015): 1–11. http://dx.doi.org/10.1155/2015/928534.

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This paper presents a quantitative investigation of the variability of meteorological dry/wet conditions of the Poyang Lake catchment during 1960–2010 by using the standardized precipitation-evapotranspiration index (SPEI) based on daily observations of 14 meteorological stations across the catchment. Extending from previous studies, the background of the encounter and overlap of multitimescales of meteorological dry/wet episodes for several severe drought and flood events were discussed. In addition, the possible impacts of temperature changes on dry/wet variability were also examined by the

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Shin, Ji Yae, Muhammad Ajmal, Jiyoung Yoo, and Tae-Woong Kim. "A Bayesian Network-Based Probabilistic Framework for Drought Forecasting and Outlook." Advances in Meteorology 2016 (2016): 1–10. http://dx.doi.org/10.1155/2016/9472605.

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Reliable drought forecasting is necessary to develop mitigation plans to cope with severe drought. This study developed a probabilistic scheme for drought forecasting and outlook combined with quantification of the prediction uncertainties. The Bayesian network was mainly employed as a statistical scheme for probabilistic forecasting that can represent the cause-effect relationships between the variables. The structure of the Bayesian network-based drought forecasting (BNDF) model was designed using the past, current, and forecasted drought condition. In this study, the drought conditions were

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Wang, Shi Xu, Zu Lu Zhang, and Xue Wang. "Heavy Metal Environmental Assessment of Surface Soil in Rizhao Tea-Planting Areas." Advanced Materials Research 807-809 (September 2013): 1397–401. http://dx.doi.org/10.4028/www.scientific.net/amr.807-809.1397.

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Analysis about contents and distributions of heavy metal elements in soil is one of the primary matters in surveying geochemical environmental quality in Rizhao tea-planting areas. By using 1km×1km sampling data of surface soil in Rizhao tea-planting areas, Geostatistics method is adopted to analyze spatial distribution of heavy metal elements, and nemerow synthetic index method is adopted to assess environmental qualities of heavy metals and show the result out by Kriging interpolation. The assessment results are as follows: the distribution of all the heavy metals besides Cd, Pb is comparati

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Nour, Hamdy E., Fatma Ramadan, Nouf El Shammari, and Mohamed Tawfik. "Status and contamination assessment of heavy metals pollution in coastal sediments, southern Kuwait." AIMS Environmental Science 9, no. 4 (2022): 538–52. http://dx.doi.org/10.3934/environsci.2022032.

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<abstract> <p>To assess the heavy metals concentration in the coastal sediments of the southern Kuwait coast, Fe, Mn, Cu, Pb, Ni, Co, Cd and Cr were measured by inductively coupled plasma mass spectroscopy. Whereas, the south of Kuwait coast is characterized by the presence of tourist resorts, and commercial and oil exports harbors. Moreover, environmental indicators were used to help in evaluating the degree and the intensity of pollutants in these sediments. Geoaccumulation index (Igeo) revealed that the sediments of hard all Hamara and Al-Khiran coasts are moderately polluted by

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Wendleder, Anna, Peter Friedl, and Christoph Mayer. "Impacts of Climate and Supraglacial Lakes on the Surface Velocity of Baltoro Glacier from 1992 to 2017." Remote Sensing 10, no. 11 (2018): 1681. http://dx.doi.org/10.3390/rs10111681.

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The Baltoro Glacier is one of the largest glaciers in the Karakoram mountain range. Long-term monitoring of glacier dynamics provides key information on glacier evolution in a changing climate, which is essential for regional water resource and natural hazard management. On large glaciers, detailed field based mass balance is not feasible. Ice dynamic variations quantify changes in mass transport and possibly the influence of environmental parameters on the evolution of the glacier. Although velocity variations of Baltoro Glacier during winter and summer are linked to seasonally enhanced basal

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Huang, Wenjun, Jianjun Yang, Yang Liu, and Entao Yu. "Spatiotemporal Variations of Drought in the Arid Region of Northwestern China during 1950–2012." Advances in Meteorology 2021 (April 3, 2021): 1–12. http://dx.doi.org/10.1155/2021/6680067.

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There are water resource shortages and frequent drought disasters in the arid region of northwestern China (ARNC). The purpose of this study is to understand the spatiotemporal variations of the droughts in this region and to further estimate future changes. Multiple drought indexes such as the standardized precipitation index (SPI), the standardized precipitation evapotranspiration index (SPEI), and the self-calibrated Palmer drought severity index (SC-PDSI) are used to investigate the temporal and spatial characteristics of the ARNC drought from 1950 to 2012. Our results indicate the followi

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Rivera, Juan A., Sofía Hinrichs, and Georgina Marianetti. "Using CHIRPS Dataset to Assess Wet and Dry Conditions along the Semiarid Central-Western Argentina." Advances in Meteorology 2019 (April 4, 2019): 1–18. http://dx.doi.org/10.1155/2019/8413964.

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The Climate Hazards group Infrared Precipitation with Stations (CHIRPS) dataset was conceived as a tool for monitoring drought and environmental change over land. Recent validation efforts along South America have assessed its suitability for reproducing the main spatial and temporal features of precipitation. Nevertheless, little has been done regarding the ability of CHIRPS for the assessment of wet and dry conditions, particularly in areas where in situ precipitation records are scarce. In this paper, we investigated the performance of CHIRPS for monitoring wet and dry events along the semi

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Nawrot, Nicole, Ewa Wojciechowska, Muhammad Mohsin, Suvi Kuittinen, Ari Pappinen, and Shahabaldin Rezania. "Trace Metal Contamination of Bottom Sediments: A Review of Assessment Measures and Geochemical Background Determination Methods." Minerals 11, no. 8 (2021): 872. http://dx.doi.org/10.3390/min11080872.

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This paper provides an overview of different methods of assessing the trace metal (TM) contamination status of sediments affected by anthropogenic interference. The geochemical background determination methods are also described. A total of 25 papers covering rivers, lakes, and retention tanks sediments in areas subjected to anthropogenic pressure from the last three years (2019, 2020, and 2021) were analysed to support our examination of the assessment measures. Geochemical and ecotoxicological classifications are presented that may prove useful for sediment evaluation. Among the geochemical

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Pei, Jia Pei, Zhang Tai, Shi Xiao Shuang, Xia Bin Yu, and Liu Ran. "Soil Heavy Metal Pollution Analysis of City Surface Based on Neural Network." Applied Mechanics and Materials 340 (July 2013): 947–51. http://dx.doi.org/10.4028/www.scientific.net/amm.340.947.

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Identified the urban soil has heavy metal pollution degree and the cause of the contamination of the overall analysis system. Through the mat lab software to realize pollution degree distribution visualization, use numerous evaluation pollution degree synthetic index methods, and then the reference neural network building the knowledge about the cause of the contamination analysis to determine the mechanism of the main causes of the pollution.

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Boudad, B., H. Sahbi, and I. Mansouri. "Analysis of meteorological and hydrological drought based in SPI and SDI index in the Inaouen Basin (Northern Morocco)." Journal of Materials and Environmental Sciences 9, no. 1 (2018): 219–27. http://dx.doi.org/10.26872/jmes.2018.9.1.25.

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Halecki, Wiktor, and Sławomir Klatka. "Aplication of Soil Productivity Index after Eight Years of Soil Reclamation with Sewage Sludge Amendments." Environmental Management 67, no. 5 (2021): 822–32. http://dx.doi.org/10.1007/s00267-020-01422-1.

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AbstractRemediation methods are gaining acceptance as effective and inexpensive techniques used in the reclamation of degraded areas. The reclamation of post-mining sites has become important for the conservation of soil and vegetation. An assessment of potential productivity of plants based on the depth of their root zone is crucial for the validation of properties of post-mining soils. Our aim was to present soil productivity parameters that would facilitate assessment of various post-mining objects. Soil productivity index (SPI) was calculated to assess soil quality, mainly in areas degrade

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Loto, O. O., and A. O. Ajibare. "Pollution Assessment of the Physico-Chemical Properties of the Lagos Lagoon." Nigerian Journal of Technological Research 16, no. 3 (2021): 1–7. http://dx.doi.org/10.4314/njtr.v16i3.1.

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Lagos lagoon has received wastewater discharged from different anthropogenic sources. Therefore, this study determined the water quality and identified its pollution status. Water quality index (WQI), several heavy metal pollution indices as well as single factor and comprehensive pollution indices were applied. The obtained data revealed that physicochemical parameter varied between 24.00±1.41 and 27.00±0.71°C for temperature; 2.50±2.83 and 10.50±0.71‰ for salinity; 3.90±0.99 and 4.60±0.85 mg/l for dissolved oxygen; 7.26±0.25 and 8.38±0.66 for pH; 3.50±0.71 and 10.00±7.07mg/l for BOD. The res

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Asamoah, Yaw, and Kow Ansah-Mensah. "Temporal Description of Annual Temperature and Rainfall in the Bawku Area of Ghana." Advances in Meteorology 2020 (April 1, 2020): 1–18. http://dx.doi.org/10.1155/2020/3402178.

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With varied implications, Ghana’s temperature and rainfall are projected to rise and decline, respectively. A study exposing specific areas of concern for appropriate responses in this regard is a welcome one. This study sought to describe the temporal variations in temperature and rainfall in the Bawku Area of Ghana. A forty-year (1976–2015) daily climate data was collected on three meteorological stations from the Ghana Meteorological Agency. Normality test, homogeneity test, Standardised Precipitation Index (SPI) analysis, Mann–Kendall trend test, and One-way post hoc ANOVA were performed u

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Zhu, Xiaoping, Wenlong Chen, Jianguo Wang, et al. "Synthetic Evaluation on the Potential Ecological Risks of Heavy Metal Pollution in Sediments in the Sea near Bohe Port of Maoming." Journal of Physics: Conference Series 2224, no. 1 (2022): 012069. http://dx.doi.org/10.1088/1742-6596/2224/1/012069.

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Abstract The pollution index method and Hakanson potential ecological risk index method were used to study and analyze the pollution factors (Hg, Cu, Pb, Zn, Cd, As, Cr) in surface sediments of the sea near Bohe Port of Maoming. The results show that the overall contamination level and potential ecological risk of typical pollutants are at the low level in this sea area. The sequence of the pollution degree of heavy metals in surface sediments is As> Cr >Zn> Hg>Cu>Pb>Cd; and the potential ecological risk sequence is Hg>As>Cd>Cu>Pb>Cr >Zn. Hg is the major fac

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Farshbaf Zinati, F., J. D. D. Jansen, and S. M. M. Luthi. "Estimating the Specific Productivity Index in Horizontal Wells From Distributed-Pressure Measurements Using an Adjoint-Based Minimization Algorithm." SPE Journal 17, no. 03 (2012): 742–51. http://dx.doi.org/10.2118/135223-pa.

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Summary Recent developments in the deployment of distributed-pressure-measurement devices in horizontal wells promise to lead to a new, low-cost, and reliable method of monitoring production and reservoir performance. Practical applicability of distributed-pressure sensing for quantitative-inflow detection will strongly depend on the specifications of the sensors, details of which were not publicly available at the time of publication. Therefore, we theoretically examined the possibility of identifying reservoir inflow from distributed-pressure measurements in the well. The wellbore and nearwe

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Darma, Aminu Inuwa, Sani Ibrahim, and Ali Sani. "The impact of gold ore mining on total lead (Pb) concentration in some mining and residential communities in Zamfara State, Nigeria." Dutse Journal of Pure and Applied Sciences 8, no. 2b (2022): 43–52. http://dx.doi.org/10.4314/dujopas.v8i2b.5.

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Illegitimate artisanal gold mining quite often results in elevated lead (Pb) concentrations in mining and residential areas close to ore mining sites, which exposes the communities to varying degrees of health and environmental challenges.Here,mining and residential soils from Abare, Dareta and Bagega, Anka local government,Zamfara state's exposed communities, were examined for total Pb concentration.Three replicates of soil from four different soil fields in mining and residential areas were carefully selected for sampling from the surface layer 0 to 21 cm.All thesoil samples were digested an

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Nhu, Viet-Ha, Ayub Mohammadi, Himan Shahabi, et al. "Landslide Detection and Susceptibility Modeling on Cameron Highlands (Malaysia): A Comparison between Random Forest, Logistic Regression and Logistic Model Tree Algorithms." Forests 11, no. 8 (2020): 830. http://dx.doi.org/10.3390/f11080830.

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We used remote sensing techniques and machine learning to detect and map landslides, and landslide susceptibility in the Cameron Highlands, Malaysia. We located 152 landslides using a combination of interferometry synthetic aperture radar (InSAR), Google Earth (GE), and field surveys. Of the total slide locations, 80% (122 landslides) were utilized for training the selected algorithms, and the remaining 20% (30 landslides) were applied for validation purposes. We employed 17 conditioning factors, including slope angle, aspect, elevation, curvature, profile curvature, stream power index (SPI),

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Zhang, Hanwen, Yuee Huang, Shu Zhou, Liangchen Wei, Zhiyuan Guo, and Jinchun Li. "Pollution level and risk assessment of heavy metals in sewage sludge from eight wastewater treatment plants in Wuhu City, China." Spanish Journal of Agricultural Research 18, no. 2 (2020): e1103. http://dx.doi.org/10.5424/sjar/2020182-15796.

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Aim of study: To investigate the content, contamination levels and potential sources of five heavy metals (Hg, Pb, Cd, Cr, As) in sewage sludge from eight wastewater treatment plants (W1 to W8).Area of study: Wuhu, located in southeastern Anhui Province, southeastern China.Material and methods: The sewage sludge pollution assessment employed the single-factor pollution index, Nemerow’s synthetic pollution index, monomial potential ecological risk coefficient and potential ecological risk index. The potential sources among the five heavy metals were determined using the Pearson’s correlation an

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Manik, Tumiar Katarina, Paul B. Timotiwu, and Mua’ddin Mua’ddin. "Shallot growth and yield supported by irrigation and nitrogen application in utilizing dry land area in Mesuji, Lampung Province, Indonesia." SAINS TANAH - Journal of Soil Science and Agroclimatology 20, no. 1 (2023): 100. http://dx.doi.org/10.20961/stjssa.v20i1.70711.

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Lampung Province, Indonesia local government intended to extend shallot cultivation in Mesuji Regency, Lampung (-3.86, 105.43). Mesuji has 21,863.5 ha dry land area, with unproductive land of 10,325.6 ha which could be potential for growing <em>shallot</em>. However, horticulture crops such as shallot often face obstacles in dry land since dry land characterized with poor soil nutrient and limited water. The objective of this research are to analyze the effects of nitrogen fertilizer and different irrigation volumes on shallot growth and production, investigate shallot suitability

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Zhuang, Sukai, and Xinwei Lu. "Environmental Risk Evaluation and Source Identification of Heavy Metal(loid)s in Agricultural Soil of Shangdan Valley, Northwest China." Sustainability 12, no. 14 (2020): 5806. http://dx.doi.org/10.3390/su12145806.

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To understand the environmental quality and heavy metal(loid) pollution of farmlands in Shangdan Valley, the contents of macroelements (Na, K, Si, Mg, Ca, Al, Fe, Ti, P, S, Cl, Br) and heavy metal(loid)s (Cu, Pb, Zn, Mn, Ni, V, Co, Cr, As) were surveyed by the X-ray fluorescence method. The pollution degree and ecological risk of the heavy metal(loid)s were judged by the Nemerow synthetic pollution index, geo-accumulation index, and potential ecological risk index, and their sources were identified by the multivariate statistic method. The mean contents of nine heavy metal(loid)s in Shangdan V

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Askar, Shavan, Sajjad Zeraat Peyma, Mohanad Mohsen Yousef, et al. "Flood Susceptibility Mapping Using Remote Sensing and Integration of Decision Table Classifier and Metaheuristic Algorithms." Water 14, no. 19 (2022): 3062. http://dx.doi.org/10.3390/w14193062.

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Flooding is one of the most prevalent types of natural catastrophes, and it can cause extensive damage to infrastructure and the natural environment. The primary method of flood risk management is flood susceptibility mapping (FSM), which provides a quantitative assessment of a region’s vulnerability to flooding. The objective of this study is to develop new ensemble models for FSM by integrating metaheuristic algorithms, such as genetic algorithms (GA), particle swarm optimization (PSO), and harmony search (HS), with the decision table classifier (DTB). The proposed algorithms were applied in

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