Identification of Spring Distribution in the Pusur Sub-Watershed and Surroundings Using Geographic Information System

Abstract

Groundwater is the water that originates from the surface and infiltrates the ground, forming a hydrological system. The presence of groundwater is influenced by various factors, including climate conditions, geomorphology, geology, human activities, and land cover conditions. The Pusur Sub- Watershed area is part of the Bengawan Solo Watershed, and it is known to have a distribution of spring sources with varying levels of productivity. The presence of spring sources provides benefits for fulfilling needs in various sectors of life. This study aims to identify the distribution of springs and the productivity levels of aquifers in the Pusur Sub-Watershed area. The method used involves conducting surveys and ground checks of spring locations in the Pusur Sub-Watershed area. Subsequently, the spring distribution information is overlaid with a hydrogeological map. The results of the analysis indicate that the aquifer productivity in the Pusur Sub-Watershed area is divided into five categories: moderate productivity, moderate-localized productivity, high productivity, widespread productivity, and localized-localized productivity. The highest concentration of springs is found in the Polanharjo, Tulung, and Jatinom Districts, categorized as high productivity. Meanwhile, in the Musuk and Tamansari Districts, sprin†gs are also found in the localized-localized productivity category