Potensi pencemaran air tanah bebas pada sebagian kawasan resapan air di Lereng Selatan Gunungapi Merapi

Abstract

Decreasing quality of unconfined groundwater is one of the impacts which may occur as increasing number ofpopulation as a consequence of the development in a part of primary water infiltration. Study about the potential of unconfined groundwater pollution needs to be conducted as an alternative for monitoring water quality. Based on GOD method, all confined groundwater areas in the research location is in the high potential of pollution. The condition occurs because the natural factors in the form of aquifer, aeration zone constituent material, and the depth of groundwater have the potential to facilitate interaction between pollutants or pollutant sources with the unconfined groundwater. Variation of groundwater pollution is obtained by developing GOD method, which is by adding a modifier parameter in the form of population density. Development of GOD method results in two classes of the potential of unconfined groundwater pollution, namely the potential for low pollution with an area coverage of 30.6% of the total area of the study area, and the potential for high groundwater pollution with an area coverage of 69.4%.