The Role of Coupled Relations of Physiogeographic Elements in Catchment Water Balance

Changwu Cheng1, Wenzhao Liu2, Zhaotao Mu1 and Haixiang Zhou3, (1)University of Chinese Academy of Sciences, Beijing, China, (2)Northwest A&F University, Institute of Soil and Water Conservation, Yangling, China, (3)Northwest Normal University, College of Geography and Environmental Science, Lanzhou, China