PEMODELAN VULNERABILITAS AIR TANAH DANGKAL DI PANTAI SELATAN KABUPATEN BANTUL - YOGYAKARTA

Abstract

Groundwater quality, espicially shallow groundwater is very vulnerable to
pollution from residence, urban, agriculture, and industrial activity. All of
the activity, to result waste and pollutant potentially, that can degrade
groundwater quality, like as in southern coast of Bantul Resisence-
Yogyakarta. So, it’s need modeling of vulnerability of shallow groundwater
in unconfined aquifer. Based on natural condition of southern coast of
Bantul Residence, parameters are used in development this model are
depth of groundwater level, surface geological condition, soil condition, and
aquifer media.Based on this model, vulnerability of southern coast in Bantul Residence, is: abaut 27,86 km (47,52%) is classified in vulnerable class, 16,23 km (27,69%) is very vulnerable, 5,49 km (9,37% is, poor vulnerable and 9,04 km (15,42%) is not vulnerable. Generally, groundwater vulnerability is degrade toward land.