Water Practice & Technology最新文献_第6页

The effect of the compound slope spillway on air entrainment and total kinetic energy using computational fluid dynamics 利用计算流体动力学研究复合斜坡溢流道对空气夹带和总动能的影响

Water Practice & Technology Pub Date : 2024-02-19 DOI: 10.2166/wpt.2024.036

U. A. Jahad, Mohammed A. Alabas, Ammar Mahmoud, Riyadh Al-Ameri, Subrat Das

{"title":"The effect of the compound slope spillway on air entrainment and total kinetic energy using computational fluid dynamics","authors":"U. A. Jahad, Mohammed A. Alabas, Ammar Mahmoud, Riyadh Al-Ameri, Subrat Das","doi":"10.2166/wpt.2024.036","DOIUrl":"https://doi.org/10.2166/wpt.2024.036","url":null,"abstract":"\u0000 \u0000 The spillway is a hydraulic structure used for managing discharge, dissipating energy, and aeration purposes. The objective of this CFD analysis was to compare the ways in which water moved over various slanted spillways. Both the turbulence and the air–water interface were located using the volume of fluid (VOF) technique and a realizable k-model. Five different spillway models with varying slopes (normal = 30°, compound1 = 20° and 39°, and compound2 = 39° and 20°) were modelled and simulated in ANSYS Fluent. Computational data have been compared to the experimental results, and the findings were astonishing – the CFD model precisely captured the all-important flow facets. The numerical model pinpointed the inception point that occurred due to changes in slope and structure. In comparison to the normal slopes of (30°) and the compound slopes of (39°/20°), the surge in the location of the inception point was around 58%. The results of the research indicate a significant increase in turbulent kinetic energy as a result of the introduction of the compound slope. The study conducted has effectively achieved a crucial objective of the project, which is to enhance the operational efficiency and reliability of the spillway under diverse flow conditions.","PeriodicalId":510255,"journal":{"name":"Water Practice & Technology","volume":"236 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140449604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

GIS-based assessment of groundwater vulnerability to heavy metal contamination via water quality pollution indices in urban Aligarh, India 通过水质污染指数对印度阿利加尔市地下水易受重金属污染影响程度进行基于地理信息系统的评估

Water Practice & Technology Pub Date : 2024-02-01 DOI: 10.2166/wpt.2024.019

Mohd Saalim Badar, Shahrukh Ali, Daniyal, Md Wasim Akram, Kashif Faheem, Saif Ullah Khan, I. Farooqi

{"title":"GIS-based assessment of groundwater vulnerability to heavy metal contamination via water quality pollution indices in urban Aligarh, India","authors":"Mohd Saalim Badar, Shahrukh Ali, Daniyal, Md Wasim Akram, Kashif Faheem, Saif Ullah Khan, I. Farooqi","doi":"10.2166/wpt.2024.019","DOIUrl":"https://doi.org/10.2166/wpt.2024.019","url":null,"abstract":"\u0000 \u0000 The study presents an assessment of groundwater vulnerability due to heavy-metal contamination using Heavy Metal Pollution and Contamination Index of Urban Aligarh. Globally, hazardous compounds in industrially contaminated sites are pressing and high-priority issue. A detailed risk assessment was carried out to determine the potential health hazards linked to locations that were recently polluted. A total of 17 groundwater samples were taken from hand-pump and 20 industrial drainage samples were collected from selected areas of Aligarh. The concentration of heavy-metals in the collected samples analyzed were shown on maps using ArcGIS software and interpreted for Heavy Metal Pollution Index (HPIx) and Contamination Index (CDx). These analyzed values were subsequently compared with the permissible limits established by the agencies like EPA, WHO, and BIS. The mean concentration of heavy-metals in groundwater of different locations was observed as follows particular sequence: Ni (1.40), Cu (0.58), Zn (0.06), Fe (0.08), Mn (0.04), Cr (0.001), Pb (0.00025) mg/l. Additionally in industrial effluent, Cr (18.3), Ni (13.34), Mn (1.16), Cu (1.99), Pb (1.2), Fe (6.3), Zn (0.51) mg/l. According to HPIx, the analysis reveals 64.7%, of visited areas belonged to have safe groundwater. Conversely, a smaller proportion, 35.3%, was found falling into heavy metal-polluted group.","PeriodicalId":510255,"journal":{"name":"Water Practice & Technology","volume":"328 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140468274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling of aquifer geo-hydraulic characteristics with geo-electrical methods at a major coastal aquifer system in Uyo, southern Nigeria 用地质电学方法模拟尼日利亚南部乌约一个主要沿海含水层系统的含水层地质水文特征

Water Practice & Technology Pub Date : 2024-01-31 DOI: 10.2166/wpt.2024.018

N. Udosen, A. M. Ekanem, N. George

{"title":"Modeling of aquifer geo-hydraulic characteristics with geo-electrical methods at a major coastal aquifer system in Uyo, southern Nigeria","authors":"N. Udosen, A. M. Ekanem, N. George","doi":"10.2166/wpt.2024.018","DOIUrl":"https://doi.org/10.2166/wpt.2024.018","url":null,"abstract":"\u0000 \u0000 Characterization of aquifer geo-hydraulic properties is essential for groundwater management and conservation. This work demonstrates the use of electrical resistivity surveying data in the characterization of important geo-hydraulic properties within a major coastal aquifer in southern Nigeria. Geo-electrical data acquired along profile lines with the use of Schlumberger array configuration were used to determine the aquifer geo-hydraulic parameters such as aquifer resistivity ρb, water resistivity ρw, porosity Φ, formation factor F, hydraulic conductivity K, transmissivity T, permeability Kp, and tortuosity τ. The resistivity inversion models delineated the occurrence of four lithological layers, with resistivity of the geo-layers ranging from 2.4 to 4,393 Ω m. Contour maps were created to show the distribution of the various geo-electrical and geo-hydraulic parameters over the study area. Regression curves showing the relationship between the geo-hydraulic parameters were generated and used to generate empirical relationships between the parameters. The empirical formulas developed for these geo-hydraulic parameters will aid in future work seeking to characterize aquifer zones and model aquifer geo-hydraulic units. In all, electrical resistivity surveying was found to be a noninvasive, cost-effective, and efficient method of characterizing aquifer geo-hydraulic properties via nonpoint geo-electrical data collected over the earth's surface.","PeriodicalId":510255,"journal":{"name":"Water Practice & Technology","volume":"567 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140470979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Benefit–cost analysis of a low-impact development design 低影响开发设计的效益成本分析

Water Practice & Technology Pub Date : 2024-01-30 DOI: 10.2166/wpt.2024.017

E. Hidayah, W. Widiarti, R. U. A. Wiyono, V. Dermawan, D. Fadhilah, W. Tahir

引用次数: 0

Assessment of resampling methods on performance of landslide susceptibility predictions using machine learning in Kendari City, Indonesia 在印度尼西亚肯达里市利用机器学习评估重采样方法对滑坡易发性预测的影响

Water Practice & Technology Pub Date : 2024-01-08 DOI: 10.2166/wpt.2024.002

S. Aldiansyah, Farida Wardani

{"title":"Assessment of resampling methods on performance of landslide susceptibility predictions using machine learning in Kendari City, Indonesia","authors":"S. Aldiansyah, Farida Wardani","doi":"10.2166/wpt.2024.002","DOIUrl":"https://doi.org/10.2166/wpt.2024.002","url":null,"abstract":"\u0000 \u0000 Landslide susceptibility projections that rely on independent models produce biased results. This situation will worsen class balance if working with a small population. This study proposes a landslide susceptibility prediction model based on resampling, cross-validation, bootstrap, and random subsampling approaches, which is integrated with the machine learning model, generalized linear model, support vector machine, random forest, boosted regression trees, classification and regression tree, multivariate adaptive regression splines, mixture discriminate analysis, flexible discriminant analysis, maximum entropy, and maximum likelihood. This methodology was applied in Kendari City, an urban area which faced destructive erosion. Area under the ROC curve (AUC), true skill statistics (TSS), correlation coefficient (COR), normalized mutual information (NMI), and correct classification rate (CCR) were used to evaluate the predictive accuracy of the proposed model. The results show that the resampling algorithm improves the performance of the standalone model. Results also revealed that standalone models had better performance with the BT algorithm compared to the CV and RS algorithms. The Bt-RF model excels in statistical measures (AUC = 0.97, TSS = 0.97, COR = 0.99, NMI = 0.50, and CCR = 0.91). Given the admirable performance of the proposed models in a moderate scale area, promising results can be expected from these models for other regions.","PeriodicalId":510255,"journal":{"name":"Water Practice & Technology","volume":"15 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139446811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A multiobjective optimization approach for wastewater network long-term rehabilitation planning: a case study 污水管网长期修复规划的多目标优化方法：案例研究

Water Practice & Technology Pub Date : 2024-01-05 DOI: 10.2166/wpt.2024.001

Ph R Sampaio, N. Caradot, A. Guilbert, V. Parez

引用次数: 0

Lithological exploration for potable water lens in the Indus Delta and their connectivity with freshwater seepage and environment 印度河三角洲饮用水透镜岩性勘探及其与淡水渗流和环境的联系

Water Practice & Technology Pub Date : 2024-01-03 DOI: 10.2166/wpt.2023.232

Zia-uddin Abro, S. A. Shah, Abdul Latif Qureshi, A. Soomro, M. A. Jamali, Tae-Woong Kim, R. S. Alharbi, Siti Azira Abd Rahim

{"title":"Lithological exploration for potable water lens in the Indus Delta and their connectivity with freshwater seepage and environment","authors":"Zia-uddin Abro, S. A. Shah, Abdul Latif Qureshi, A. Soomro, M. A. Jamali, Tae-Woong Kim, R. S. Alharbi, Siti Azira Abd Rahim","doi":"10.2166/wpt.2023.232","DOIUrl":"https://doi.org/10.2166/wpt.2023.232","url":null,"abstract":"\u0000 The world's seventh-largest Indus Delta is gripped to extinction due to a continuous shortage of Indus River flows. The drastic fall in the ecology and coastal habitat due to the lack of freshwater flows, and the land degradation due to seawater intrusion is a simultaneous creeping hazard. The study aims to explore the potable water lens and their possible connection with seepage from freshwater bodies (rivers/ canals) to sustain them for drinking and agriculture use of 2 million populations. The study employed the electrical resistivity survey and 10 selected points along the Indus River at depths up to 300 m to baseline the rock type and groundwater quality; and drilling of bore logs at a maximum depth of 25 m. The result confirms the availability of two sandstone layers with marginal freshwater along the river and in some pockets; however brackish water was observed along the coast in a limestone formation. It is evident from the results that surface seepage from the Indus River and non-perennial ‘Pinyari’ canal has a progressive influence on the improvement of groundwater quality and confinement of seawater intrusion.","PeriodicalId":510255,"journal":{"name":"Water Practice & Technology","volume":"337 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140514267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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