GROUNDWATER RESOURCE AND ITS HYDROCHEMICAL OF PANGGANG AND SURROUNDING AREA, GUNUNGKIDUL
T. Listyani R.A.
Sekolah Tinggi Teknologi Nasional Yogyakarta
Abstract
The potential of groundwater is part of water resources that need to be studied to determine its feasibility for living needs. One of its potentials involves its hydrochemistry. This hydrochemical study of groundwater has been carried out in Panggang and surrounding areas, Gunungkidul on the Panggang Hydrogeology Sub-system. Field hydrogeological surveys and laboratory tests of two groundwater samples have been used for hydrochemical analysis. Surface water sometimes gathers in doline morphology to then infiltrate into the soil and rocks through fractures, cracks/fissures, and dissolution cavities/conduit. Groundwater is characterized by limestone aquifers with the inter-grain flow and secondary porosity channel/network flow through cavities. Aquifers are dominated by reef limestones, with secondary holes sometimes large enough to form caves. Karst springs are found as a permanent or seasonal source. Groundwater comes out of the karst aquifer, especially in caves resulting from dissolution on the surface and below the surface. Groundwater in the springs studied has Ca, Mg-bicarbonate and Ca-bicarbonate types. The bicarbonate facies shows fresh water characteristic, young age with the dominant hydrochemical processes include simple dissolution and ion exchange. Low TDS and Cl contents indicate that groundwater is in the recharge zone. Although it is carbonate, based on its hydrochemical, the groundwater is still suitable for use as drinking water.
Keywords: groundwater, hydrochemical, hydrogeological process, feasibility
Topic: International Symposium of Civil, Environmental, and Infrastructure Engineering