8Nisar A hamed T R, Gopal Rao K, Murthy J S R. Automatic extraction of tank outlets in a sub-watershed using digital elevation models[J]. Agricultural Water Management, 2002, 57 (3): 1- 10.
9Kwan T L. Generating design hydrographs by DEM assisted geomorphie runoff simulation: a case study [J]. Journal of the American Water Resources Association, 1998, 34(2) : 375--384.
10Turcotte R, Fortin J P, Rousseau A Net al. Determination of the drainage structure of a watershed using a digital elevation model and a digital river and lake network [J]. Journal of Hydrology,2001, 240(3--4):225--242.