8Aller I,Bennet T,Lehr J H,et al.DRASTIC:a standardized system for evaluating groundwater pollution potential using hydrogeologic settings[R].London:U S EPA Report,1987.
9Lobo-Ferreira J P,Oliveira M M.DRASTIC groundwater vulnerability mapping of Portugal[C]//Procee-dings,Congress of the International Association of Hydraulic Research.IAHR Part C,1997:132-137.
10Zhou Hui-cheng,Wang Guo-li,Yang Qing.A multi-objective fuzzy recognition model for assessing groundwater vulnerability based on the DRASTIC system[J].Hydrological Sciences,1999,44(4):611-618.