Extraction of Landslide Areas Using Spatial Features of Topographic Basins
T. Kusaka, M. Shikada, Y. Kawata · 2005
Spatial features of watersheds are examined to clarify characteristic properties in areas where landslides may occur. In this study, first, a method for delineating watersheds from the digital terrain data is described. Next, the area (A), mean slope (S) and form factor (F=A/L2) of watersheds are estimated. Here, L is the length of the main stream in a watershed. As a result, it is shown that topographic features in landslide areas are successfully characterized by a linear combination of the normalized values of A, S and F.