【摘要】 利用祁连山水源林生态系统定位研究站长期（２２ａ）观测资料，对其河川径流组成及时空变化分析表明，祁连山河川径流一个水文年可划分为枯水径流期、雪融水径流期和洪水径流期３个时期．发源于祁连山高海拔森林覆盖区的河流均为混合补给型河流水源补给主要有地下径流、雪融水径流、降水径流（地表径流、表层潜流、壤中流）和冰川融水径流，径流组成受水源补给影响，径流分配除受降水影响外还受到高山冰川、积雪和森林的影响因此，加强祁连山冰雪和森林资源保护，是实现可持续发展的重要措施更多还原

【Abstract】 There is a station in the QilianMountains for studying the forestry ecosystemfor water conservation. Analysis of 22 -year observation shows that three periods can be distinguished for a hydrological year, i.e., low water,snow melting and flood periods. There are manysupplies for the rivers in the forestry areas of theQilian Mountains. They are ground water, snowmeltwater, glacier meltwater and direct precipitation (direct flow, subsurface flow and submergedflow), which govern the runoff components.Runoff distribution depends on alpine glaciers,snow cover and forest coverage, in addition toprecipitation. Therefore, enhancing the conservation of glaciers and forestry in the Qilian Mountains is an important measure of water resourcesguarantee and sustainable development.更多还原