论文部分内容阅读
以永定河四级支流——崇礼县东、西沟为例,就森林植被对河川径流量的影响及其调蓄功能进行对比分析,研究半干旱石质山区森林植被的水文效应。一、方法采用大流域对比法,在对比流域的地形、地质、气候等条件基本一致的前提下,仅改变森林植被条件研究其水文效应。调查流域分别为706km~2和775km~2。利用大流域对比法研究森林水文效应,可以测量地下回归水,这样能就森林对河川径流量的影响作出更为客观的评
Taking the East and West ditch of Chongli County, the fourth tributary of Yongding River as an example, the paper compares and analyzes the impact of forest vegetation on runoff and its regulation and storage function to study the hydrological effects of forest vegetation in semi-arid stony mountainous area. First, the method of large watershed contrast method, in contrast to the basin topography, geology, climate and other conditions are basically the same premise, only to change the forest vegetation conditions to study its hydrological effects. The survey basins are 706km ~ 2 and 775km ~ 2, respectively. The study of hydrological effects of forests using the catchment comparison method in large basins can measure the return of underground water so as to make a more objective assessment of the impact of forests on runoff