Groundwater Potential Study In The Majalengka Regency, Kertajati District, To Support Water Needs At West Java International Airport (BIJB) And Kertajati Aerocity

Abstract

Ten villages in the Majalengka Regency, Kertajati District, designated as the West Java International Airport (BIJB) Provincial Strategic Area (KSP) and Kertajati Aerocity. In line with that determination, the needs of water become very important. To support the needs of water, this research had been conducted to determine how much potential of the groundwater. At the study location, data retrieval has been conducted, divided into primary data and secondary data. The secondary data had been retrieved were 13 drill log data, and 12 pumping test data. The primary data has been retrieved were outcrop data, the water table measurements (piezometric head) and the groundwater physical measurements: temperature, pH, electrical conductivity (DHL) and Total Dissolved Solid (TDS). Ooutcrop data processing conducted to determine the geological conditions at the research location. Water table measurements conducted to find out how much the damage of groundwater condition and to determine flow directions of groundwater at the study location. Drill log data processing conducted to find out how the Aquifer System at the study location. The physical data processing conducted to determine the groundwater quality at the study location. And to the potential of groundwater flow that flowing into the study area is calculated by the Darcy Equation (PLG, 2008). The results of data processing indicated that the geology at the study area is composed of volcanic and alluvial sediments, part of coarse fraction acts as a water carrier. Aquifer system consisting of unconfined aquifers (8-18 m), semiconfined aquifer and confined aquifer (> 30 m) . The decreased water table damage decline included Into safe level, namely the water table decline < 40 % . Criteria quality decline of groundwater through TDS parameters and DHL including into safe groundwater category conditions. Using Darcy equation Q =T.i.L groundwater potential in the region BIJB development and Kertajati Aerocity is amounting to 22156.57 M³/day or 8,087,149.79 M³/year, which consists differences 8.27% of total flow in the safe zone conservation and amounted to 91.73% flowing conservation in recharge zone. Groundwater potential at research sites only able supplies water for 16.37 % of the total needs for water in BIJB development and Kertajati Aerocity in 2020 is equal to 45.2 million m³ / year.