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首页> 外文期刊>Journal of African earth sciences >Hydrochemical and isotopic study of groundwater in Wadi El-Natrun, Western Desert, Egypt: Implication for salinization processes
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Hydrochemical and isotopic study of groundwater in Wadi El-Natrun, Western Desert, Egypt: Implication for salinization processes

机译：埃及西部沙漠中的地下水的水化学和同位素研究 - 盐渍化过程的含义

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摘要

Ground-water samples were collected from 10 wells in Wadi El-Natrun, Western Desert, Egypt, over four consecutive years. The combination of isotopic composition and hydrochemical analyses was used to identify the origin of the groundwater and determine recharging sources as well as to discuss the mechanism controlling hydrochemical variation among wells. Two water sources, a relatively recent/shallow aquifer recharged from Nile River water and a deep/old aquifer (i.e. the Nubian sandstone aquifer system [NSAS]), are identified from isotopic and geographical relationships and the correlation between isotopic data and bicarbonate concentration. It was found that Nile Delta aquifer water was likely supplied as groundwater flows from the southeast and that old water (paleowater) was supplied upward from deeper layers. Some wells show relatively greater variation in concentration as well as in hydrogen isotope composition during the four-year study. Based on the relationship between concentration and isotope composition the variation was not caused by seawater intrusion or salt dissolution but by intensive water loss. The water loss is not directly due to evaporation or suction but is considered to proceed indirectly within the soil.
机译：连续四年，从威达·埃尔北仑的10孔中收集地下水样品。同位素组合物和水化学分析的组合用于鉴定地下水的起源并确定充电源，讨论控制井中的水化学变化的机制。两种水源，一个相对近期/浅含水层从尼罗河水和深/古含水层充电（即Nubian砂岩含水层系统[NSAS]），从同位素和地理关系中鉴定出同位素数据与碳酸氢盐浓度之间的相关性。发现尼罗河三角洲含水层水可能被提供为从东南部的地下水流量，并且从更深层层向上提供旧水（浅照片）。在为期四年的研究期间，一些孔表明浓度和氢同位素组合物的变异相对较大。基于浓度和同位素组成之间的关系，该变异不是由海水侵入或盐溶解引起的，而是通过强化水分损失引起。由于蒸发或抽吸，水损不会直接导致，但被认为是间接地在土壤中进行。

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