贡嘎山地区不同植被对降水的物理过程影响研究

Study on Influence of Physical Process on Precipitation to Different Vegetation in Gongga Montainous Area

对贡嘎山地区两种植被类型降水再分配特征进行研究,结果表明:亚高山针叶林林冠层和针阔混交林林冠层单位面积截留降雨量分别为0.14和0.27 kg/m2,亚高山针叶林树干单位面积截留量为0.005 8 kg/m2,针阔混交林树干单位面积截留量为0.006 kg/m2。通过进行不同尺度的试验,树干截留量与胸径之间呈线性相关。枯落物的截留量、滞后时间与面积之间呈线性相关,相关度水平较高,具有明显的尺度效应。

For study on characters of precipitation reallocation of two kinds of vegetation types in Gongga Montainous area, the result show the interception precipitation is 0. 14 and 0. 27 kg/m2 respectively for unit area of Linguanceng of Coniferous forest and Conifer and broadleaf mixed forest in Yagao hill. The interception precipitation of the bough unit area of the two forests are seperately 0. 005 8 kg/m2 and 0. 006 kg/m2. Through test of different dimension, the relation is linearity between the bough interception precipitation and its chest pathway. It is linearity among the interception precipitation, the lag time and the area of litters, the relativity is on the high side and is obvious scale effect.