3[1]Durone T,Leopold L B.Water in environmental planning[M].San Francisco:W.H.Freema Co,1978.1～258.
4[2]Jaroslav Verba,Alexander Zaporozec.Guidebook on mapping groundwater vulnerability[M].Verlag:Heinz and Heise Co.,1994.1～333.
5[3]Garrett P,et al.Are the groundwater vulnerability classfication system workable[A]Proceeding of the Focus Conference on Eastern Regional Groundwater Issues[C].Kitchener,Ontone Canada:1989.123～127.
6[4]Mayers L.GIS-Based approach to evaluating regional groundwater pollution potential with DRASTIC[J].Journal of Soil and Water Conservation,1990,45(2):138～144.
7[5]David A Padgett.Using DRASTIC to improve the integrity of geograhical information system data used for solid waste management facility siting[J].The Journal of Environmental Professional,1994,(16):78～85.
3Kirkley K. Heatwole,John E. McCray.Modeling potential vadose-zone transport of nitrogen from onsite wastewater systems at the development scale[J].Journal of Contaminant Hydrology.2006(1)
