Identification and simulation of dynamic process of forest hydrologic in a river basin system

The dymamic ssystem pulse response function (SPRF) and the hydrologic state forecast equations were deduced out theoretically and the characteristics of the system were also analysed. Taking the Hemoshui River Basin in Yanling County of Hunan Province as the studying object, this article identified and simulated its SPRF in different years, and conmpared the curves of SRPF in different years. The effect of the change of forest stage on the hydrologic stage of the River Basin was also analysed and evaluated. Based on thie SPRF, the hydrologic stage process of the River Basin can be forecasted.