An Appraisal of Groundwater Potentiality in Balason River Basin of Darjeeling District Using Geospatial Technology
摘要
Water is an essential resource not only for humans but also for the entire living world. As countries around the world compete for development, there is a continuous push to enhance both agricultural and industrial growth, sectors that demand substantial water resources. Groundwater serves as a vital source, meeting a large portion of this water requirement. Hence, it is essential to identify groundwater potential zones because this will aid in decision-making and enable proper utilization of groundwater. This study focuses on delineating groundwater potential zones within the Balason River Basin in Darjeeling district using GIS, Remote Sensing techniques, and the Analytical Hierarchy Process (AHP). Six key influencing factors were analyzed: elevation, slope, drainage density, lineament density, annual rainfall, and the NDVI. Based on the analysis, five categories of groundwater potential were identified, ranging from very low to very high. The southern region of the basin exhibited comparatively higher groundwater potential than other areas. Correlation analysis between groundwater potential and the influencing factors revealed a negative association with elevation and slope, while positive correlations were observed with drainage density and rainfall. Lineament density and NDVI do not exhibit a significant correlation with groundwater potential. Therefore, the adoption of proper water management strategies will ensure the future development of the study area, considering the causative factors.