Water Practice & Technology最新文献_第6页

The utility of electrode-assisted ammonia oxidation under strict anaerobic conditions 严格厌氧条件下电辅助氨氧化的实用性

Water Practice & Technology Pub Date : 2024-05-06 DOI: 10.2166/wpt.2024.121

Z. Kimura, Erika Hirata

引用次数: 0

Prediction of the flow resistance in non-prismatic compound channels 非棱柱复合通道中的流动阻力预测

Water Practice & Technology Pub Date : 2024-05-06 DOI: 10.2166/wpt.2024.117

Vijay Kaushik, Bandita Naik, Munendra Kumar, Vijay K. Minocha

{"title":"Prediction of the flow resistance in non-prismatic compound channels","authors":"Vijay Kaushik, Bandita Naik, Munendra Kumar, Vijay K. Minocha","doi":"10.2166/wpt.2024.117","DOIUrl":"https://doi.org/10.2166/wpt.2024.117","url":null,"abstract":"\u0000 \u0000 Achieving an accurate estimation of the flow resistance in open channel flows is crucial for resolving several critical engineering difficulties. In instances when there is excessive flow on both banks of a river, it results in the breach of the primary channel, leading to the discharge of water into the adjacent floodplain. The alteration of floodplain geometry occurs as a consequence of agricultural and developmental practises, leading to the emergence of compound channels that exhibit converging, diverging, or skewed characteristics throughout the course of the flow. The efficacy of conventional equations in accurately forecasting flow resistance is limited due to their heavy reliance on empirical approaches. As a result of this phenomenon, there persists a significant need for methodologies that possess both novelty and precision. The objective of this work is to use the support vector machine (SVM) technique for the estimation of the Manning's roughness coefficient in a compound channel with converging floodplains. Statistical indicators are used to validate the constructed models in the experimental investigation, enabling the assessment of their performance and efficacy. The findings indicate a significant correlation between the Manning's roughness coefficient predicted by SVM and both experimental data and prior research outcomes.","PeriodicalId":104096,"journal":{"name":"Water Practice & Technology","volume":"51 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141008318","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

Impact of coastal inundation due to rise in sea level: a case study of Surat City, India 海平面上升对沿海淹没的影响：印度苏拉特市案例研究

Water Practice & Technology Pub Date : 2024-05-04 DOI: 10.2166/wpt.2024.116

R. Sahu, Darshan J. Mehta

{"title":"Impact of coastal inundation due to rise in sea level: a case study of Surat City, India","authors":"R. Sahu, Darshan J. Mehta","doi":"10.2166/wpt.2024.116","DOIUrl":"https://doi.org/10.2166/wpt.2024.116","url":null,"abstract":"\u0000 \u0000 The urban population of the world houses almost 13% in low-elevation coastal zone (LECZ). Major cities with a population of more than 5 million, which account for almost two-thirds of the world's large cities, reside in low-elevation coastal zones. These areas house some of the most important socioeconomic activities, and they are also environmentally delicate. According to the IPCC 2007 report, there will be an 8–88 cm rise in sea level between 2000 and 2100 AD, which will have an unpredictable and massive impact on land up to 9 m elevation above MSL. This study discusses the rise in sea level, climate vulnerability, and future problems using elevation-based GIS analysis, accomplishing socioeconomic vulnerability and exposure. The statistics suggest that more than 26% of the population lies within a 9 m contour interval, whereas a 20 m contour accommodated 81% of the total population. In figures, it is estimated that over 1,632,200 people by 2011 which is expected to rise to 4,048,894 people by 2050 are exposed to 100-year flood events. Thus, the study clinched that a significant number of people in Surat confront flooding due to the extreme rise in water level during this period.","PeriodicalId":104096,"journal":{"name":"Water Practice & Technology","volume":"67 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141013951","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

Arsenic removal by layered double hydroxides (LDH): A mini review 层状双氢氧化物（LDH）去除砷：微型综述

Water Practice & Technology Pub Date : 2024-05-04 DOI: 10.2166/wpt.2024.111

Tugba Turk, Taha Boyraz, İbrahim Alp

{"title":"Arsenic removal by layered double hydroxides (LDH): A mini review","authors":"Tugba Turk, Taha Boyraz, İbrahim Alp","doi":"10.2166/wpt.2024.111","DOIUrl":"https://doi.org/10.2166/wpt.2024.111","url":null,"abstract":"\u0000 The World Health Organization (WHO) has classified arsenic as the most toxic chemical with carcinogenic effects and WHO has established a value of 10 μg/L arsenic as the maximum contaminant level for arsenic in potable water. High selectivity and high removal capacity are one of the most important factors when choosing an adsorbent. Hydrotalcite and hydrotalcite-like compounds have received much attention for the remediation of As-contaminated waters. The most interesting properties of layered double hydroxides (LDHs) include a large surface area and high anion exchange capacity. In this study, the importance of double-layered hydroxides, which has gained importance with the increasing environmental pollution recently, in removing oxyanion pollutants from water has been emphasized. This review article focuses on LDH synthesis and characterization techniques and arsenic removal potential using LDHs, as well as the safe consumability of water obtained after removal. In this review, various factors such as pH, dosage, and temperature that affect oxyanion adsorption on LDHs are discussed. The reusability of LDHs has been discussed. In addition, it has been investigated whether double-layer hydroxides (FeHT) could be used successfully in the removal of arsenic from polluted waters. It was also discussed whether the adsorbent used was safe for health.","PeriodicalId":104096,"journal":{"name":"Water Practice & Technology","volume":"123 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141013315","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 statistical model for estimating porosity based on various parameters of flow through porous media 根据流经多孔介质的各种参数估算孔隙度的统计模型

Water Practice & Technology Pub Date : 2024-05-03 DOI: 10.2166/wpt.2024.114

Rajat Kango, Abhishish Chandel, Vijay Shankar

{"title":"A statistical model for estimating porosity based on various parameters of flow through porous media","authors":"Rajat Kango, Abhishish Chandel, Vijay Shankar","doi":"10.2166/wpt.2024.114","DOIUrl":"https://doi.org/10.2166/wpt.2024.114","url":null,"abstract":"\u0000 \u0000 Flow through porous media is a process with a momentous impact on the environment. Hydraulic conductivity, which depends on the particle size, shape, and porosity of the media, has applications in different fields of science, e.g., groundwater, seepage, and soil stability. Precise estimation of porosity leads to accurate computation of the hydraulic conductivity of porous media. The present study investigates the effect of particle size on the porosity of porous media, i.e., crushed quartzite, river gravel, marble chips, and sand. The influence of the wall effect on packing and porosity of porous media based on the diameter ratio, i.e., the ratio of permeameter-to-particle size (Dp/dg) has also been investigated. The hydraulic conductivity and the porosity of porous media are observed to increase with an increase in the particle size. The study postulates a dependable relation between hydraulic conductivity and porosity. The experimentally obtained and the model-generated porosity values for crushed quartzite, river gravel, marble chips, and sand range between 0.38–0.42 and 0.37–0.43, respectively. Experimental data have been used to derive a statistical model based on the diameter ratio (5.08 ≤ (Dp/dg) ≤ 254) for estimating the porosity of media. The validation of the statistical model using experimental data establishes the efficacy of the developed model.","PeriodicalId":104096,"journal":{"name":"Water Practice & Technology","volume":" 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141129726","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

Impacts of flow regime characterization on selected water quality parameters in Mthatha River catchment 流态特征对姆塔塔河流域选定水质参数的影响

Water Practice & Technology Pub Date : 2024-04-25 DOI: 10.2166/wpt.2024.103

O. Amoo, Nombuyiselo Makupula, Ikudayisi Akinola, Motebang Dominic Vincent Nakin

{"title":"Impacts of flow regime characterization on selected water quality parameters in Mthatha River catchment","authors":"O. Amoo, Nombuyiselo Makupula, Ikudayisi Akinola, Motebang Dominic Vincent Nakin","doi":"10.2166/wpt.2024.103","DOIUrl":"https://doi.org/10.2166/wpt.2024.103","url":null,"abstract":"\u0000 The effects of altered streamflow types on selected water quality parameters provide useful knowledge and information for prompt water pollution management. This study assesses the impacts of inter- and intra-year seasonal variability in streamflow types on selected water quality parameters. The study uses percentiles, multivariance correlation, and agglomerative hierarchical clustering analysis (AHC) in XLSTAT statistics software to achieve the study aim. Historical dataset for streamflow, rainfall, and selected water quality parameters between 2012 and 2020 for the Mthatha River catchment (MRC), Eastern Cape, South Africa were used to characterize the different seasonal variability impacts with the selected water quality parameters at both the upper and lower reach of the river. The result of the inter and intra-year seasonal variability analyses show that the catchment's flow magnitude varies between 2.0 and 2.7 m3/s in summer while the results of the nonlinear polynomial relationship between the grouped streamflow regime show a coefficient of correlation (R2) values of 0.4264 and 0.5643, suggesting that a mild alteration occurs in the catchment. Decision-makers would find the study useful in controlling the pollutant effluent discharge into the river at different times and maintaining standard effluent requirements as mitigation strategies for sustaining the river ecosystem.","PeriodicalId":104096,"journal":{"name":"Water Practice & Technology","volume":"26 16","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140658186","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

Integrated sensing device for irrigation scheduling: field evaluation and crop water stress index estimation of wheat 用于灌溉调度的综合传感设备：小麦的田间评估和作物水分胁迫指数估算

Water Practice & Technology Pub Date : 2024-04-25 DOI: 10.2166/wpt.2024.102

Arti Kumari, D. K. Singh, A. Sarangi, Murtaza Hasan, Vinay Kumar Sehgal, Soora Naresh Kumar, Cini Verghese

{"title":"Integrated sensing device for irrigation scheduling: field evaluation and crop water stress index estimation of wheat","authors":"Arti Kumari, D. K. Singh, A. Sarangi, Murtaza Hasan, Vinay Kumar Sehgal, Soora Naresh Kumar, Cini Verghese","doi":"10.2166/wpt.2024.102","DOIUrl":"https://doi.org/10.2166/wpt.2024.102","url":null,"abstract":"\u0000 \u0000 An integrated sensing device for irrigation scheduling (ISDI) was developed to assess the soil–plant–atmosphere continuum for irrigation scheduling. In the present study, a field experiment was carried out to evaluate the performance of ISDI. ISDI was used to determine crop water stress index (CWSI) across various irrigation regimes in wheat crop at the WTC farm, ICAR-IARI, New Delhi, India. The experiment considered were full irrigation (FI) and various deficit irrigation levels (DI-15, DI-30, DI-45, and DI-60), receiving 15, 30, 45, and 60% less water in comparison to FI, respectively. The calibration and performance of the ISDI sensor probes in the field was done with gravimetric methods along with time domain reflectometry (TDR) and a handheld infrared thermometer. The field calibration of the ISDI's soil moisture probe and TDR gave promising results, with R² values ranging from 0.76 to 0.81 and 0.81 to 0.86, respectively, for soil depths up to 45 cm. ISDI's infrared sensor probe also demonstrated strong alignment with a handheld infrared thermometer (R2: 0.95), indicating reliable methods. Furthermore, a regression equation for estimating the lower baseline and upper threshold for CWSI computation was derived as (Tc − Ta)ll = 1.97 × VPD − 1.43 with R2 of 0.86 and 1.93 °C, respectively. It was also recommended to initiate irrigation when CWSI was ≥0.35 for wheat to achieve optimal crop yields.","PeriodicalId":104096,"journal":{"name":"Water Practice & Technology","volume":"4 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140652995","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

Estimation of water inflows to reservoirs of irrigation dams in the Guinea Savannah ecological zone of Ghana 加纳几内亚草原生态区灌溉大坝水库的进水量估算

Water Practice & Technology Pub Date : 2024-04-24 DOI: 10.2166/wpt.2024.086

T. Adongo, F. K. Abagale

{"title":"Estimation of water inflows to reservoirs of irrigation dams in the Guinea Savannah ecological zone of Ghana","authors":"T. Adongo, F. K. Abagale","doi":"10.2166/wpt.2024.086","DOIUrl":"https://doi.org/10.2166/wpt.2024.086","url":null,"abstract":"\u0000 \u0000 The study was carried out in the northern Ghana to estimate water inflows to nine reservoirs of irrigation dams for a period of 20 years (1999–2018) using the USDA Natural Resources Conservation Service Curve Number model. The key input parameters of the model were hydrologic soil group, rainfall amount, landuse/landcover, weighted curve number, antecedent moisture condition, and potential maximum soil moisture retention. The annual rainfall within the reservoir catchments was found to vary between 617.20 and 1,382.30 mm. The estimated annual runoff depths ranged from 54.10 to 125.55 mm. A high degree of positive correlation was found between rainfall and runoff depths with a coefficient of determination (R2) ranging from 79.80 to 90.70%. Hydrologic soil groups accounted for about 67.2 and 62.5% of the variation in runoff depth and percentage runoff, respectively. The estimated annual water inflows to the reservoirs ranged from 145,206 ± 125,814 m3/y at Gambibgo to 47,074,634 ± 4,395,860 m3/y at Tono. The variation in the annual water inflows and annual storage capacity recharge among the various reservoirs was noted to be influenced by reservoir size, catchment size, rainfall, and soil characteristics in the reservoir catchments.","PeriodicalId":104096,"journal":{"name":"Water Practice & Technology","volume":"44 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140663110","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

Development of water recycling based mechanical drain cleaning system 开发基于水循环的机械式下水道清洁系统

Water Practice & Technology Pub Date : 2024-04-24 DOI: 10.2166/wpt.2024.101

Amrit Raj Paul, Simeon A. Babalola, A. K. Yadav, Manidipto Mukherjee, Dilpreet Singh

{"title":"Development of water recycling based mechanical drain cleaning system","authors":"Amrit Raj Paul, Simeon A. Babalola, A. K. Yadav, Manidipto Mukherjee, Dilpreet Singh","doi":"10.2166/wpt.2024.101","DOIUrl":"https://doi.org/10.2166/wpt.2024.101","url":null,"abstract":"\u0000 \u0000 The persistent global issue of manual scavenging in drainage systems, fraught with life-threatening risks, has prompted the development of a tractor powered mechanized drain cleaning system. This innovative solution recycles on-site sewage water, optimizing efficiency through a tractor-trolley setup, recycled water usage, a centrifugal pump replacing vacuum pumps, and the integration of a post-inspection unit for crack and leak detection. The system employs a front water jet with an impact stress of ∼30.10 MPa for penetrating silt, sediments, and debris. Simultaneously, rear jets with ∼20 MPa impact stress each clean pipeline walls and propel the nozzle forward. Inclusion of a power unit (tractor), suction unit, filtration unit, and inspection unit enhances the system's agility, robustness, and affordability compared to alternatives. The system's one of the key advantage is its inspection unit, featuring GoogleNet-powered in-situ crack detection via a camera. Achieving 90% training accuracy in six epochs and 159 iterations, it identifies pipeline features effectively. With its sewage water recycling capability, this mechanized system offers a promising solution to the perilous problem of manual scavenging in drainage systems while promoting sustainability.","PeriodicalId":104096,"journal":{"name":"Water Practice & Technology","volume":"30 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140661253","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

Machine learning for water demand forecasting: case study in a Brazilian coastal city 机器学习用于水需求预测：巴西沿海城市案例研究

Water Practice & Technology Pub Date : 2024-04-23 DOI: 10.2166/wpt.2024.096

Jesuino Vieira Filho, Arlan Scortegagna, Amanara Potykytã de Sousa Dias Vieira, Pablo A. Jaskowiak

{"title":"Machine learning for water demand forecasting: case study in a Brazilian coastal city","authors":"Jesuino Vieira Filho, Arlan Scortegagna, Amanara Potykytã de Sousa Dias Vieira, Pablo A. Jaskowiak","doi":"10.2166/wpt.2024.096","DOIUrl":"https://doi.org/10.2166/wpt.2024.096","url":null,"abstract":"\u0000 \u0000 Water resources management is crucial for human well-being and contemporary socio-economic development. However, the increasing use of water has led to various problems that affect its quality and availability. To address these issues, accurate forecasting of water consumption is essential for the optimal operation of water collection, treatment, and distribution systems. This study aims to compare four machine learning methods for predicting daily urban water demand in a Brazilian coastal tourist city (Guaratuba – Paraná). Historical data from the city’s water distribution system, spanning from 2016 to 2019 (1,461 measurements in total), were considered along with meteorological and calendar data to conduct the investigation. Three time series cross-validation approaches were considered for each method, thus totaling 12 evaluation settings. All models were subjected to hyperparameter optimization and evaluated using appropriate performance metrics from the literature. Results demonstrate the importance of using nonlinear models to predict short-term water demand, highlighting the problem’s complexity. From the compared models, multilayer perceptron provided the best results. Finally, regardless of the model, the best results were obtained by applying an expanding window time series cross-validation, indicating that the more historical data available, the better, in this particular case.","PeriodicalId":104096,"journal":{"name":"Water Practice & Technology","volume":"141 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140668825","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

Water Practice &amp; Technology最新文献

Water Practice & Technology最新文献