Recharge Zone of Shallow Groundwater at Southeastern Part of Kulon Progo District Area based on Groundwater Facies

Abstract

The Galur and Lendah areas are in the southeastern part of Kulon Progo Regency, Yogyakarta, Indonesia. This area has become a developing area because of the new airport in this district. Along with its development, the need for groundwater in this area is increasing, so groundwater research is also increasingly needed. A study on groundwater is required to support the development of this region. This time, a groundwater study was conducted to determine the potential for the recharge-discharge zone, also groundwater flow patterns based on the chemical facies of the groundwater. The hydrogeological survey was carried out with groundwater sampling from 9 (nine) dug wells and 1 () spring for physical/chemical testing of groundwater in the laboratory. The results showed groundwater in the study area generally flows south or northwest, with a radial pattern anomaly in the north. The shallow groundwater studied was bicarbonate type with Ca, Na, and Mg cations variations. The groundwater facies characterizes groundwater that is typical in the catchment