Multi-layer groundwater flow simulation in Al-Khoud lower catchment in Oman

IF 1.4 Q4 WATER RESOURCES

Journal of Applied Water Engineering and Research Pub Date : 2021-10-03 DOI:10.1080/23249676.2021.1982027

Al-Mundhar Al-Nasri, L. Gunawardhana, G. Al-Rawas, M. Baawain, A. Sana

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引用次数: 2

Abstract

Sustainable groundwater resource management requires a better understanding of multilayer interactions, caused by the heterogeneous formations and enhanced by the groundwater withdrawal in aquifers. This phenomenon was studied in Al-Khoud lower catchment in Oman. Water exchange between different layers was observed by measuring piezometric heads of wells located at the same place with screen intervals placed in different layers. In addition, groundwater levels from 8 more wells and pumping rates from 60 wells were used for developing a numerical model in a 156 km2 area. Lithological data from 23 boreholes were used for defining three subsurface layers. Model results under different conditions indicated that 1.9–3.8 m head difference could be attributed to the pumping, while 2.1–6.0 m groundwater-level variations were accounted for the heterogeneity and anisotropic effects. Further analysis showed that the increased pumping rate increased the piezometric head difference between the layers, which enhances the multi-layer interactions.

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阿曼Al Khoud下游集水区的多层地下水流动模拟

可持续的地下水资源管理需要更好地了解多层相互作用，这种相互作用是由非均质地层引起的，并因含水层中的地下水抽取而得到加强。这一现象在阿曼Al Khoud下游流域进行了研究。通过测量位于同一位置的井的测压头，观察不同层之间的水交换。此外，还利用另外8口井的地下水位和60口井的抽水率，在156平方公里的区域内建立了一个数值模型。23个钻孔的岩性数据用于确定三个地下层。不同条件下的模型结果表明，1.9–3.8 m水头差可归因于抽水，而2.1–6.0 m地下水位的变化解释了非均质性和各向异性效应。进一步的分析表明，泵送速率的增加增加了层间的压差，从而增强了多层相互作用。

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来源期刊

Journal of Applied Water Engineering and Research WATER RESOURCES-

CiteScore

2.90

自引率

16.70%

发文量

期刊介绍： JAWER’s paradigm-changing (online only) articles provide directly applicable solutions to water engineering problems within the whole hydrosphere (rivers, lakes groundwater, estuaries, coastal and marine waters) covering areas such as: integrated water resources management and catchment hydraulics hydraulic machinery and structures hydraulics applied to water supply, treatment and drainage systems (including outfalls) water quality, security and governance in an engineering context environmental monitoring maritime hydraulics ecohydraulics flood risk modelling and management water related hazards desalination and re-use.