摘要
森林植被的变化可以调节森林水文过程。本文以广元市碗厂沟的5个小流域为研究对象,根据实测水位资料,分析了在植被恢复过程中流域径流的变化情况。结果表明:随着森林植被的不断恢复,(1)流域降水转化为径流的数量(即径流系数)降低;(2)在相同的雨量级与相似的雨强情况洪峰得到削弱,洪峰时间延长;(3)在相似的降雨历时的条件下洪水过程线历时增长。
The forest vegtation＇s change can adjust the forest hydrology process. In this paper,five smaU watersheds in wanchanggou of Guanyuan City were taken as research objects, and according to actual water level data , the changing situation of the runoff in the watershed was analysized in the vegetation recovery process. The result indicated that along with forest vegetation＇s unceasing restoraton, （ 1 ） the quantity preciptation transforming into runoff in the watershed （ namely runoff） coefficient would reduce ; （2） In the same rain magnitude and the similar rain strong situation, the flood peak would weaken, but the flood peak time would lengthen;（3） In simiar precipitation lasting time , the flood process line would increase.
出处
《四川林业科技》
2007年第2期49-53,共5页
Journal of Sichuan Forestry Science and Technology
基金
国家"十五"计划攻关项目 长江上游低山丘陵区水源涵养型植被建设技术研究与示范(2001BA510B02-03)
国家"十五"计划攻关项目 四川盆周低山区水土流失综合治理技术与示范(2001BA606A-06-3)
关键词
森林植被
洪峰
径流系数
Forest vegetation, Flood peak, Coefficient of runoff
