Delineation of groundwater potential zones in hard rock terrains using geospatial techniques and AHP method: A case study from Notse, southern Togo, West Africa

IF 5.8 Q2 ENGINEERING, ENVIRONMENTAL

Groundwater for Sustainable Development Pub Date : 2025-11-01 Epub Date: 2025-08-14 DOI:10.1016/j.gsd.2025.101503

Komlavi Eyram Agbotsou , Ayyagari Venkata Surya Satya Anand , Mozimwè Ani , Bendalam Moulika , Edupuganti Naga Dhanamjaya Rao , Kissao Gnandi

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Abstract

Groundwater is essential for human survival and sustainable development. While surface water studies are well documented, knowledge of groundwater resources remains limited. Identifying groundwater potential is key to meeting current and future water demands. This study applied geospatial techniques and the AHP method to delineate groundwater potential zones. Twelve thematic layers were integrated: geomorphology, lithology, slope, lineament density, drainage density, rainfall, distance from rivers, topographic wetness index (TWI), soil type, land use land cover (LULC), curvature and elevation. Results indicate that 66.02 % of the study area has low groundwater potential, 33.94 % has moderate potential and only 0.04 % is classified as high potential. Map-removal and single-parameters sensitivity analyses confirm the stability of the AHP model. Validation using borehole data and the ROC curve analysis confirms strong agreement (90 % and 87.5 %) with the predicted zones, demonstrating the model’s reliability for groundwater potential assessment in Notse. These findings offer a scientific foundation for developing sustainable groundwater management strategies, aligned with Sustainable Development Goals (SDG) 2 and 6

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基于地理空间技术和层次分析法的硬岩地形地下水潜势区圈定——以西非多哥南部Notse地区为例

地下水对人类生存和可持续发展至关重要。虽然对地表水的研究有充分的记录，但对地下水资源的了解仍然有限。确定地下水潜力是满足当前和未来用水需求的关键。应用地理空间技术和层次分析法对地下水潜力带进行了圈定。12个主题层被整合在一起：地貌、岩性、坡度、线条密度、排水密度、降雨量、与河流的距离、地形湿度指数（TWI）、土壤类型、土地利用土地覆盖（LULC）、曲率和高程。结果表明：研究区66.02%为低潜力区，33.94%为中等潜力区，仅有0.04%为高潜力区。图谱去除和单参数敏感性分析证实了AHP模型的稳定性。利用钻孔资料和ROC曲线分析验证了模型与预测带的一致性（90%和87.5%），证明了该模型在Notse地区地下水潜力评价中的可靠性。这些发现为制定符合可持续发展目标2和6的可持续地下水管理战略提供了科学基础

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来源期刊

Groundwater for Sustainable Development Social Sciences-Geography, Planning and Development

CiteScore

11.50

自引率

10.20%

发文量

152

期刊介绍： Groundwater for Sustainable Development is directed to different stakeholders and professionals, including government and non-governmental organizations, international funding agencies, universities, public water institutions, public health and other public/private sector professionals, and other relevant institutions. It is aimed at professionals, academics and students in the fields of disciplines such as: groundwater and its connection to surface hydrology and environment, soil sciences, engineering, ecology, microbiology, atmospheric sciences, analytical chemistry, hydro-engineering, water technology, environmental ethics, economics, public health, policy, as well as social sciences, legal disciplines, or any other area connected with water issues. The objectives of this journal are to facilitate: • The improvement of effective and sustainable management of water resources across the globe. • The improvement of human access to groundwater resources in adequate quantity and good quality. • The meeting of the increasing demand for drinking and irrigation water needed for food security to contribute to a social and economically sound human development. • The creation of a global inter- and multidisciplinary platform and forum to improve our understanding of groundwater resources and to advocate their effective and sustainable management and protection against contamination. • Interdisciplinary information exchange and to stimulate scientific research in the fields of groundwater related sciences and social and health sciences required to achieve the United Nations Millennium Development Goals for sustainable development.