Risk Assessment of Groundwater Contamination: A Multilevel Fuzzy Comprehensive Evaluation Approach Based on DRASTIC Model

Table 1

S-P-R-C model of groundwater contamination.

Source	Pathway	Receptor	Consequences
D; R; A; S; T; I; C	Path 1; Path 2; Path 3	People; Property; Environment	Human health; Environmental pollution

Path 1: the contamination migrates out of the region.
Path 2: the contamination bypasses the reactive barrier and enters the protected zone.
Path 3: the contamination migrates to the region intercepted by the permeable reactive barrier.