气候变化对阿尔及利亚东部米蒂迪亚平原地下水资源的影响

IF 0.8 Q4 WATER RESOURCES
Nouara Makhlouf, Djamel Maizi, A. Boufekane
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引用次数: 1

摘要

本研究的目的是评估东米蒂迪亚平原(阿尔及利亚,23.82亿平方公里)的主要气候特征及其对流域水文制度和含水层水动力功能的影响。具体目标是确定含水层的补给方式,提出地下水超采的解决方案,修复其东北部的海水问题。应用三种统计方法(Pettitt’s、Buishand’s U统计和Lee和Heghinian’s检验)和两种干旱指数(SPI和Ipmc),可以确定1906-2018年期间的干湿期。此外,通过1973年、1981年、2015年和2020年的测压图分析,研究了研究区水动力行为,并确定了水文状况对含水层水文地质功能的影响。应用三种统计方法和两种干旱指数得到的结果显示了两个不同的时期。第一个时期是湿润的,从1906年持续到1973年,第二个时期是干燥的,从1974年持续到2018年。它的特征是与前一时期(1906-1973)相比,降雨量减少15%至19%。此外,从1973年到2020年,测压水位显著下降,变化幅度在10到80米之间,这表明测压水位呈负趋势。这种减少与1973年至2018年期间注意到的降雨不足相吻合。平原区东北部也有海水入侵。为了加强地下水管理,一项有效的补救策略是利用该地区现有污水处理厂的人工补给技术,同时停止在受海水入侵影响的沿海地区抽水水井,并对地下水进行水化学监测。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Impact of climatic variability on groundwater resources in the Eastern Mitidja plain, Algeria
The aim of this study is to assess the main climatic characteristics and their impact on the hydrological regime at the watershed and the hydrodynamic functioning of the aquifer in the Eastern Mitidja plain (Algeria, 2,382 millions km2). In detail, specific objectives are to determine the recharge mode of the aquifer, to propose solutions for the groundwater overexploitation and to remedy the seawater problem in its northeastern part. The application of three statistical methods (Pettitt’s, Buishand’s U statistic and, Lee and Heghinian’s tests) and two drought indices (SPI and Ipmc) allowed identifying the wet and dry periods for the time interval 1906-2018. In addition, the piezometric maps analysis for the years 1973, 1981, 2015 and 2020 was carried out to investigate the hydrodynamic behavior of the study area and to determine the effect of the hydrological regime on the hydrogeological functioning of the aquifer. Results obtained by the application of the three statistical methods and two drought indices indicate two distinct periods. The first period is wet and it extends from 1906 to 1973, while the second period is dry and it goes from 1974 to 2018. It is characterised by a rainfall deficit between 15% and 19% compared to the previous period (1906-1973). Furthermore, a significant drawdown in the piezometric levels is observed from 1973 to 2020, varying between 10 and 80 m, that indicates a negative trend of piezometric levels. This drawdown coincides with the rainfall deficit noticed during the period 1973-2018. Also, seawater intrusion was observed in the northeastern part of the plain. To enhance groundwater management, an effective remediation strategy is to use an artificial recharge technique from the existing wastewater treatment plants in the region, complemented by stopping the pumping of wells in coastal zones that are affected by seawater intrusion supplemented by a hydro-chemical monitoring of the groundwater.
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来源期刊
CiteScore
1.80
自引率
50.00%
发文量
36
审稿时长
8 weeks
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