Application of geostatistical techniques to assess groundwater quality in the Lower Anayari catchment in Ghana

HydroResearch Pub Date : 2022-01-01 DOI:10.1016/j.hydres.2022.04.001

Dickson Abdul-Wahab , Abass Gibrilla , Dickson Adomako , Dennis K. Adotey , Samuel Ganyaglo , Cynthia Laar , Nafisatu Zakaria , Geophrey Anornu

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Abstract

In this study, integrated geostatistical techniques were applied to appraise the groundwater quality for various purposes in the Lower Anayari Catchment (LAC), Ghana. Physico-chemical and trace metals were analysed for 41 groundwater samples. Groundwater in LAC was generally found to be moderately hard to fresh and the information entropy-based groundwater quality index (IEGQI) ranked approximately 80.49% of the groundwater as excellent. Partial Least square regression analysis suggests that PO₄³⁻, As, Cd and Fe are important parameters for the prediction of IEGQI values. The irrigation water quality index (IWQI) suggest that 2.44% of groundwater in LAC is suitable for moderate permeability soils, 65.85% for moderate to high permeability soils and 31.71% for moderate to high salt tolerance plants. The LSI and RSI indices rate groundwater in LAC to be aggressive water with a high probability of being corrosive to metals, depending on the levels of dissolved oxygen present.

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应用地质统计技术评估加纳下阿纳亚里集水区的地下水质量

在本研究中，综合地质统计技术应用于评价加纳下阿纳亚里集水区(LAC)的各种目的的地下水质量。对41个地下水样品进行了理化和微量金属分析。LAC地区的地下水一般为中等难鲜，基于信息熵的地下水质量指数(IEGQI)将约80.49%的地下水评为优。偏最小二乘回归分析表明，PO43−、As、Cd和Fe是预测egqi值的重要参数。灌溉水质指数(IWQI)表明，LAC地下水适合中渗透土壤的比例为2.44%，适合中至高渗透土壤的比例为65.85%，适合中至高耐盐植物的比例为31.71%。根据存在的溶解氧水平，LSI和RSI指数将LAC的地下水评为具有腐蚀性的水，对金属具有很高的腐蚀性。

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来源期刊

HydroResearch

CiteScore

9.20

自引率

0.00%

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