干旱区森林水源涵养生态服务功能研究进展

论述了干早区森林水源涵养的机理、研究方法及研究现状，根据长期的定位观测资料分析干旱区森林对降水到径流过程的影响及对水分归宿的作用。认为干旱区森林水源涵养的生态功能在干旱区生态环境建设中具有重要作用。目前国内对干旱区森林涵养功能的分析仍偏重于定点定位观测，获取的资料以统计分析为主，在大尺度上建立定量预测模型及监控措施等方面还需作深入的研究。

Study on One of Ecological Services of Forest Ecosystem in Arid Region Water Resource Conservation

Forests serve human in two important functions:ecological ser vi ce and direct economic supply The main object of this paper is to analyze the f u nction of water conservation of the forest,one of ecological service function in Qilian Mountain The results show that:the rate of precipitation intercepted by crown canopy is 25 86% in Picea crassifolia community,28 95% in Sabina przewa lskii community,and 66 1% in bush Water retained by litter is 9 7mm in Picea crassifolia,1 7mm Sabina przewalskii,6 5mmin in bush The rate of soil infiltr ation is 105 67mm/min in Picea crassifolia,7 27mm/min in Sabina przewalskii,4 44 mm/m in bush Our results also show that forests can not only reduce the pe ak discharge in a storm,but also stabilize the normal discharge However,the eco nomic supply function has been long overexploited and the ecological service fun ction ignored Although the ecological service function is being increasingly re alized,its quantitative definition and scientific essences are not fully explore d