Water Resources Management X最新文献_第2页

STUDY OF THE CLOGGING PROCESS IN A SEMI-ARID REGION: WADI EL HIMMER, MOROCCO 半干旱地区堵塞过程的研究:摩洛哥瓦迪埃尔希默

Water Resources Management X Pub Date : 2019-07-16 DOI: 10.2495/WRM190151

M. Zaidi, N. Ahfir, A. Alem, B. Mansouri, Huaqing Wang

{"title":"STUDY OF THE CLOGGING PROCESS IN A SEMI-ARID REGION: WADI EL HIMMER, MOROCCO","authors":"M. Zaidi, N. Ahfir, A. Alem, B. Mansouri, Huaqing Wang","doi":"10.2495/WRM190151","DOIUrl":"https://doi.org/10.2495/WRM190151","url":null,"abstract":"In semi-arid regions, managed aquifer recharge (MAR) is seen as an efficient solution among others for protecting groundwater resources. Clogging is one of the major issues that can reduce the durability of recharge facilities. As a consequence of clogging of soils by suspended matter, permeability, and porosity, and therefore exchange between surface water and groundwater are reduced. To our knowledge, few researchers have studied the mechanism of clogging of the MAR in a semi-arid region according to hydrologic conditions of the field. The main objective of the present work is to study the clogging process of recharge sites in a semi-arid region (Wadi El Himmer, Morocco). These recharge sites consist of a “Percolation Tank” and “Recharge Releases”, which retard and distribute the flow to facilitate infiltration into a saturated zone. Field measurements are conducted to quantify the thickness of the surface deposits (cake) according to precipitation at different recharge sites. To realize these measurements, wooden pickets were implanted at different locations of the recharge sites. After 12 weeks of exposure to hydro-meteorological conditions, the thickness of the deposited (suspended matter) layer was measured on each picket. In order to facilitate the interpretation of results, the kriging method was used to interpolate obtained measurements. A significant variation in cake thickness was observed at each recharge site following the flow direction. The layer deposited is mainly dominated by red clays and silts. These results prompted us to investigate the impact of these deposits on the deep clogging.","PeriodicalId":252733,"journal":{"name":"Water Resources Management X","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132579931","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

ASSESSING GROUNDWATER RECHARGE IN TWO SITES WITH DIFFERENT CLIMATES IN THE ALICANTE REGION OF SOUTH-EAST SPAIN 评估西班牙东南部阿利坎特地区两个不同气候地点的地下水补给

Water Resources Management X Pub Date : 2019-07-16 DOI: 10.2495/WRM190121

M. Fernández-Mejuto, J. M. Andreu, C. Pla, J. Valdés-Abellán

引用次数: 2

INTEGRATED MODEL TO MANAGE WATER SCARCITY IN HIGHLY COMPLEX SYSTEMS OF SOUTH-EAST SPAIN 在西班牙东南部高度复杂的系统中管理缺水的综合模型

Water Resources Management X Pub Date : 2019-07-16 DOI: 10.2495/WRM190051

A. Jodar-Abellan, Patricia Fernández-Aracil, J. Moreno

引用次数: 0

INTERNALIZATION ANALYSIS OF ENVIRONMENTAL COSTS OF WASTEWATER TREATMENT IN THE VALENCIAN COMMUNITY, SPAIN 西班牙瓦伦西亚社区污水处理环境成本的内部化分析

Water Resources Management X Pub Date : 2019-07-16 DOI: 10.2495/WRM190061

M. López, B. Sanz, J. Moreno

{"title":"INTERNALIZATION ANALYSIS OF ENVIRONMENTAL COSTS OF WASTEWATER TREATMENT IN THE VALENCIAN COMMUNITY, SPAIN","authors":"M. López, B. Sanz, J. Moreno","doi":"10.2495/WRM190061","DOIUrl":"https://doi.org/10.2495/WRM190061","url":null,"abstract":"The need for water resources currently demands the development of measures to improve the management of these resources and increase their availability. However, these measures have an environmental impact that must be considered when carrying them out. The Water Framework Directive establishes that the economic and environmental costs of the activities carried out must be recovered, because this is necessary to ensure the sustainability of these activities and the continuity in the use of natural resources. The purification and reuse of wastewater is an activity within the framework of the circular economy that intends to reduce the environmental impact of contaminated water discharges and to increase the available resources. The problem is that this activity, being part of the production process, is linked to an environmental impact due to the use of chemical components, the construction of the facilities and, especially, the intensive energy consumption of the purification stations, since part of the energy comes from non-renewable sources. This environmental impact must be internalized in the cost structures through additional measures to mitigate it, so the objective of this paper is to determine the state of such internalization. Analyzing the costs of purification stations, the annual report of the EPSAR (Public Entity for Wastewater Sanitation of the Valencian Community) and the reports of the Hydrographic Confederations of Júcar and Segura, we can determine that there is no internalization in the stations, it is low in the EPSAR but increasing with time and for the Confederations the situation is complicated, as they cannot even recover their financial costs and the creation of several additional measures has been suspended. Finally, it has been found that there are economies of scale in terms of energy consumption of this activity, as well as significant potential energy savings during the purification process.","PeriodicalId":252733,"journal":{"name":"Water Resources Management X","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123550863","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: 3

MACHINE LEARNING AS A DECISION SUPPORT TOOL FOR WASTEWATER TREATMENT PLANT OPERATION 机器学习作为污水处理厂运行的决策支持工具

Water Resources Management X Pub Date : 2019-07-16 DOI: 10.2495/WRM190101

Thibault Mercier, A. Dembélé, T. Denoeux, P. Blanc

{"title":"MACHINE LEARNING AS A DECISION SUPPORT TOOL FOR WASTEWATER TREATMENT PLANT OPERATION","authors":"Thibault Mercier, A. Dembélé, T. Denoeux, P. Blanc","doi":"10.2495/WRM190101","DOIUrl":"https://doi.org/10.2495/WRM190101","url":null,"abstract":"Wastewater treatment is a significant environmental challenge. It is also an economic challenge for all operators, who face more and more demanding national and supranational regulations. Optimizing wastewater treatment processes requires physical, biological and chemical models with various degrees of complexity. From an operational perspective, programmable logic controllers are generally used. Those controllers follow strategies implemented by technicians with various degrees of expertise. This may lead to overor under-aeration, which can be very costly. Commonly used strategies are mostly based on business rules and expert guidelines, which do not necessarily consider specific operating conditions. In this study, focused on the aeration process, a machine learning approach is applied to predict the daily operating time of aerators. Two types of models, according to the data considered, have been evaluated. The first model considers only the operation data as explanatory variables (pollutant concentrations and inflow), while the second model includes exogenous weather data (temperature, hygrometry, rainfall depth). The best model reaches a mean error less than 1%.","PeriodicalId":252733,"journal":{"name":"Water Resources Management X","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129305797","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