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《Journal of Mountain Research》 2003-02
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Study on One of Ecological Services of Forest Ecosystem in Arid Region Water Resource Conservation

ZHAO Chuan yan,FENG Zhao dong,and LIU Yong (National Laboratory of Western China's Environmental Systems, Lanzhou University,Lanzhou 730000 China)  
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
【Fund】: 受教育部高等学校骨干教师基金资助 (2 0 0 0 冯兆东 )~~
【CateGory Index】: S718.5
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