Analysis of groundwater pollution vulnerability using DRASTIC method development in Bandung city

Bandung is one of the major cities in Indonesia with a high population density. To meet clean water needs, most people in Bandung use groundwater. Problems related to groundwater are limited in quantity and its quality is degraded by pollution. The efforts to protect groundwater quality from pollutants can be started by mapping the areas that are vulnerable to pollution. There are various methods to map the pollution vulnerability of an area, one of it is DRASTIC method. The parameter of this method consists of groundwater level, rainfall, aquifer media, soil media, topography, vadose zones, hydraulic conductivity. In this study, the DRASTIC method was developed by adding land use parameters to become more dynamic. The distribution information of groundwater pollution vulnerability can be used as a reference in sustainable development. This study aims to zone the level of groundwater pollution vulnerability in Bandung. The research methodology begins by collecting map data by following the required parameters. After that, the weighting of each parameter refers to the DRASTIC method that has been developed, then overlay with Arc.GIS 10.2. The results of this study are Bandung City region has 3 classes of groundwater pollution vulnerability consist of high (22%), moderate (72%), and low (6%) zones.