Groundwater potency for domestic demand in Banguntapan District, Bantul Regency

Banguntapan District in Bantul Regency is one of the districts bordering the City of Yogyakarta. Because of its strategic location, the development of this district is very rapidly marked by population and settlement growth. As a result, the demand for facilities and infrastructure has also increased including the need for groundwater for domestic water sources. The purpose of this study is to determine the groundwater potency and domestic needs of the population. The study of domestic water demand is carried out to find out the current water needs and the level of criticality. For this reason a static groundwater potential calculation and the water needs are carried out. Calculation and analysis results show that groundwater potency in unconfined aquifers in the study area is 279, 004, 000 m3 /year, with safe yield of groundwater extraction are 13, 109, 292 m3 /year. Although groundwater extraction for domestic demand which amounted to 6, 392, 874 m3 /year is still smaller than the safe yield, according to the calculation of the criticality index the water is almost classified in the critically approaching criteria.