祁连山青海云杉林对降水的再分配研究

以祁连山西大河流域的青海云杉林为研究对象，通过2013年7-8月份的野外定位观测，结合西大河自然保护站前期观测数据，对青海云杉林在83次降水事件中的林冠截留、林内穿透雨、树干茎流进行了分析。结果表明，青海云杉林林冠截留量、林内穿透量、树干茎流量分别为138．8 mm／1、253．1 mm、1196 mm，分别占林外降水的39．5％、60．01％、0．70％。当降水量级大于2．41 mm时，有树干茎流产生，当降水量级大于lO．00 mm时，才能观测到树干茎流。

Study on Redistribution of Picea Crassifolia Forest on Rainfall in Qilian Mountains

Qinghai spruce forest in Qilian mountain as the research object, through field positioning observation in July andAugust 2013, combined with the early observation data in Xidahe natural conservation station, the canopy interception, forestthrough the rain, and the trunk stem-flow of Qinghai spruce forest in the rainfall interception by canopy of in 83 times, the resultsshows that the amount of Qinghai spruce forest canopy interception, the penetration amount of forest, trunk stem flow of Qinghaispruce forest were 138.8 mm, 253.1 mm and 1.96 ram, respectively, accounted for 39.5%, 60.01%, 0.70% of reunite rainfall.When rainfall level greater than 2.41 mm, just have trunk stream stem, when rainfall level greater than 10.00 mm, to trunk stemflow were observed.