6Dunkerley D L. Surface tension and friction coefficients in shallow, laminar overland flows through organic litter [J]. Earth Surface Processes and Landforms,2002a(27) :45-58
7Dunkerley D L. Volumetric displacement of flow depth by obstacles,and the determination of friction in shallow overland flows [J]. Earth Surface Processes and Landforms,2002b(27) :165-175
8Dunkerley D L, Domelow P,Tooth D. Frictional retardation of laminar flow by plant litter and surface stones on dry land surfaces : a laboratory study[J]. Water Resources Research,2001 (37) :1417-1424
9Qin Y S,Yu X X, Wang S Y. Water Interception and Retarding Characteristics of Forest Litters in the Upper Streams of Miyun Reservoir, Beijing[J]. Forestry Studies in China ,2000,2 (1) :58-62