1. Ai T H, Zhu G R, Zhang G S, 2003. Extraction of landform features and organization of valley tree structure based on Delaunay Triangulation Model. Journal of Remote Sensing, 7(4): 292–298. (in Chinese)
2. Bai S B, Lv G N, Sheng Y H et al., 2005. Analysis of landslide causative factors using GIS in the Three Gorges Reservoir area, China. Journal of Mountain Science, 23(1): 63–70. (in Chinese)
3. Bi L S, He H L, Xu Y R et al., 2011. The extraction of knick point series based on the high resolution DEM data and the identification of paleo-earthquake series: A case study of the Huoshan MTS. Piedmont Fault. Seismology and Geology, 33(4): 963–977. (in Chinese)
4. Bi R T, Du J Y, Chai Y F, 2013. A study on soil diversity in Sushui River Based on the DEM. Chinese Journal of Soil Science, 44(2): 266–270. (in Chinese)
5. CAO M, Tang G A, Zhang F et al., 2013. A cellular automata model for simulating the evolution of positive-negative terrains in a small loess watershed. International Journal of Geographical Information Science, 27(7): 1349–1363. (in Chinese)