ABSTRACT

In North Gujarat, local communities depend on the Precambrian basement aquifers for their primary source of water supply. The increasing demand for potable water puts stress on exploring for groundwater from less reliable sources of basement rocks. The main objective is to map groundwater potential zones (GWPZs) in water-scarce Precambrian terranes using integrated multi-criteria analysis (analytical hierarchy process and geospatial techniques). The output of the GWPZ map was grouped into six different categories. The results show that very high and high groundwater potentials extend over areas of 4.29% and 12.86%, respectively. The kappa index method was used for validation and showed an effective result between collected water-level data with calculated GWPZ. It shows 83.3% accuracy for very high, 85.7% for high and 90.1% for moderate GWPZs. The study shows promise and highlights that such an integrated analysis is reliable and can be applied anywhere with a similar set-up for groundwater prospecting and management.

摘要

在北古吉拉特邦，当地社区依靠前寒武纪地下含水层作为主要供水来源。对饮用水日益增长的需求使得从不太可靠的基岩来源中勘探地下水的压力越来越大。主要目标是使用综合多标准分析（层次分析法和地理空间技术）绘制缺水前寒武纪地体中的地下水潜力区（GWPZ）。GWPZ 地图的输出分为六个不同的类别。结果表明，非常高和非常高的地下水潜力分别延伸到 4.29% 和 12.86% 的区域。kappa 指数方法用于验证，并显示了收集的水位数据与计算的 GWPZ 之间的有效结果。它显示非常高的准确率为 83.3%，高的为 85.7%，中等的 GWPZ 为 90.1%。