6Turner, M. G., Gardner, R.H. Quantitative Methods in Landscape Ecology[M]. New York: Springer-Verlag, 1991.
7Riitters K H, O'Neill R V, Hunsaker C T, et al. A factor analysis of landscape pattern and structure metrics [J]. Landscape Ecology,1995, 10:23～39.
8McGarigal K, Marks B. FRAGSTATS: Spatial pattern analysis program for quantifying landscape structure. Reference manual[M].Oregon: Forest Science Department, Oregon State University, 1994.
9Novotny V.Diffuse pollution from agriculture-a worldwide outlook[J].Wat Sci Tech,1999,39(3):1-13.
10Brookes,A.Restoration and enhancement of engineered river channels:some European experience[J].Regulated River:Research and Management,1990,5:45-56.
