Abstract
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.
Highlights
Water is one of the most important natural resources in supporting human life, so it needs to be managed well [1,2,3]
The equation used is [11]: Vat = D x A x Sy where Vat is the volume of groundwater that can be pumped from the aquifer, D is the thickness of the aquifer, A is the area and Sy is the specific yield or percentage of water that can be released from the aquifer
3.2 Climate The climate situation in Banguntapan District cannot be separated from the overall climate condition of Java Island, which is influenced by monsoons, namely global winds that blow due to the influence of the location of the sun, so that they will always change direction every half year
Summary
Water is one of the most important natural resources in supporting human life, so it needs to be managed well [1,2,3]. Instead of other types of water (rainwater and river water), groundwater has better quality, so that it is still the main source to meet daily water needs. A study related to groundwater availability is important to know considering that groundwater is the most clean water source widely used by the community [4, 5]. Groundwater management starts by paying attention to the recharge area. Rainwater that falls in the area will experience infiltration. This pervasive downward movement of water will only stop if there is an impermeable layer that blocks it [7]
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