期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2016
卷号：7
期号：12
页码：4511-4524
出版社：University of Mohammed Premier Oujda
摘要：In this work, a geochemical study was undertaken to assess the chemistry of ground waters in the Reg basin (Oriental Anti-Atlas, Morocco). This region is characterized by an increasing demand of water resources which is the main source for drinking and irrigation due to the uncertain rainfall in the south-eastern of Morocco. Groundwater samples were collected at over Twenty-four locations in the Reg Basin in summer 2015. Physical characteristics (temperature, electrical conductivity, dissolved oxygen, pH, oxidation reduction potential (eH) were measured at the well-site. Alkalinity titrations were performed on filtered samples in the field. All wells were sampled for analysis of major cations by ICP-AES and major anions by ionic chromatography. For geochemical calculations we used PHREEQCI program. The results showed that the waters from the North-West of the basin are Ca-SO4 type, in the center of the Reg, the waters have a mixed facies (Ca-Na and SO4).The North eastern part of the studied area show two distinguished water families the Ca-SO4 waters. The second family is slightly Na-Cl, both of those two families are circulating in the Paleozoic formations. The majority of the studied waters record medium salinity to brackish waters similar to the recorded waters in the great Tafilalet. The chemical compositions of groundwater are determined by a number of processes which include: Rainfall, recharge from the wadi or Rivers, anthropogenic activities, interactions of water with soil and rock-water (Barite, sulphate, pyrite, Lithium, and Silver…) that could indicate a diffuse mineralization of these elements. Also, there are very high levels of Iron, Manganese and Aluminum in the studied waters. They exceed in several cases the OMS recommended values for drinking waters. Unfortunately their existence in the groundwater of this area reduces a lot the quality and its ability to drinking purposes. This aims study is to supporting the development of appropriate management tools for groundwater in the Tafilalt area.
关键词：Groundwater; water quality; Hydrogeochemistry; Mineralization; Reg Basin; Anti Atlas (Morocco)
