GIS-Based DRASTIC Model for Groundwater Vulnerability Assessment in Zhongwei, China

DRASTIC model is used in the study to evaluate the groundwater vulnerability of Meili Paper industrial park to provide a reference to the protection and management of groundwater. Due to the groundwater vulnerability depends on the inherent characteristics of aquifer, the method quantitative analysis groundwater vulnerability by select seven hydrogeological parameters that have a significant effect on aquifer vulnerability and are easily obtained. The acronym DRASTIC stands for: Depth to the water, net Recharge, Aquifer media, Soil media, Topography, Impact of the vadose zone media, and hydraulic Conductivity of the aquifer. The vulnerability maps were produced with the GIS software. The study area is divided into 174 regions after intersect analysis in ArcGIS and then reclassified into 5 zones according to the DRASTIC index. The higher sum values represent a greater potential for pollution or a greater vulnerability of the aquifer to contamination, and vice versa.