中文摘要：

为了探讨青海云杉林水文特征与生态因子变化关系,选择大野口流域为试验流域,充分利用历史监测资料以及现有生态监测设施仪器的优势,通过降水、林冠及树干截留、苔藓枯落物截留、土壤水分及温度、积雪消融、冻土冻融、土壤蒸发、河川径流、林分立地条件、林分气象因子、林分结构、苔藓枯落物结构、土壤特性等指标监测,采取特征参数统计、多元函数回归和相关系数等分析方法,研究了水文特与生态因子之间的相互关系。研究结论为：（1）建立了水位与河川径流量之间的回归关系,探讨了祁连山大野口流域河川径流量变化规律;（2）建立了气温、降水、土壤温度、冻土冻融、积雪消融等因子与河川径流之间的相互关系,得出了气温、降水与河川径流的变化趋势;（3）得出了苔藓、枯落物、土壤水热特征以及土壤特性与土壤蒸发之间的生态因子关系。研究结论为山地森林和水资源生态保护与建设提供科学依据和参考。

英文摘要：

Be aimed at lack systematicness weak link of research on function of water conservation at the larger watershed scale,this subject chosen Dayekou basin for experimental basin,made full use of the hwastory of Dayekou basin in Qilian Mountains and the advantage of exwasting ecological monitoring facilities equipment, through the indexes such as precipitation, interception of canopy and stem, moss litter interception, mowasture and temperature of soil, snow ablation, permafrost thawing, soil evaporation, runoff, stand site condition, meteorological factors, stand structure, moss litter structure, soil characterwastics. By means of characterwastic parameter statwastics, multivariate function and correlation coefficient. Research conclusion was that：（1） Using laser radar monitoring data about reservoir water level changes, the relationship between water level and river runoff had been analyzed, and the rivers runoff change rule of Dayekou basin in Qilian Mountains had been discussed.（2） Using observation data of Dayekou basin in Qilian Mountains from 1994 to 1994 years, the relationship between the air temperature, precipitation, soil temperature, freezing and thawing of permafrost and snow melt and other factors and river runoff had been analyzed, and the variation trends of temperature, precipitation and runoff had been concluded.（3） Through the large fixed sample survey in Dayekou basin in Qilian Mountains, the ecological factor relationship between moss and litter,and the soil water ant thermal characteristics, and soil properties and soil evaporation had been concluded.In this paper, scientific basis and reference for ecological protection and construction of mountain forest and water resources had been provided.