流域系统水文动态过程的辨识和仿真:森林水文作用的评估

Identification and simulation of river hydrologicaldynamic process of basin system : Evaluation of forestry hydrological effect

基于闭合流域系统水量输入输出平衡原理,导出流域系统水文动态过程理想状态的原理模型。研究对象选择人为作用在近40年相对变化不大,而森林状态变化较大的流域,收集流域内连续30多年的水文气象观测资料,以5年为一组数据,对流域系统不同时期的水文动态过程作了辨识和仿真,比较不同时期水文动态过程特征与森林状态,对森林水文作用进行了评估。

Based on the principle of balance of water input and output of closed basin system, the model mechanism of river hydrological dynamic process is given in the paper. With the basin system as the research object, on which human activities exerted little influence in recent 40 years while the forestry showed marked changes, the author collects the hydrological and meteorological data with five successive years in one group for nearly 40 years, then identify models of the hydrologic dynamic process of different period. By comparing the differences of river hydrological dynamic process in different period and forestry, the author give an evaluation of forestry hydrological effect.