A New Method for Rainfall Runoff Simulation Based On Dynamic Digital Terrain Model
ZHU Qiang ,SUN Min,CHEN Xiuwan Institute of Remote Sensing and Geographic Information System,Peking University,Beijing 100871;
The concept of dynamic digital terrain model (DDTM) is proposed. The main idea of DDTM is to describe the terrain surface processes by establishing the calculating rules among the related surface factors,which mainly influence the surface processes such as slope,precipitation,soil,etc. In DDTM,regular grid is taken as the unit to present natural processes,and the calculating rules are the functions of time,which decides the simulation process to be dynamic. Hydrological rainfall runoff process is used as a typical example to illustrate the principal of DDTM in the experiment. The result shows that DDTM is able to simulate terrain surface processes.