3种亚高山森林群落林冠截留量及穿透雨量与降雨量的关系

Relationship among canopy interception,throughfall and precipitation in three types of subalpine forest communities

研究了岷江冷杉林、川滇高山栎林及灌竹林等3种典型亚高山森林群落的林冠截留、穿透雨和径流的月动态变化,分析了林冠截留量、穿透雨量与总降雨量的数量关系。结果表明:川滇高山栎林、灌竹林、岷江冷杉林林冠平均截留量分别为278.2,362.1和353.7mm;林冠平均截留率分别占降雨量的35.77%,46.55%和45.47%。岷江冷杉林径流量为5.9mm,仅占降雨量的0.76%。3种群落穿透雨量分别占降雨量的53.77%,53.45%和64.23%。另外,建立了3种群落类型的穿透雨量、林冠截留量与大气降雨量之间的回归模型,用于定量评价该地区亚高山森林的生态水文效应。

In this paper, the dynamic changes of the canopy interception, throughfall and stemflow of three types of typical subalpine forest communities, i. e. , Abies faxonian forest, Quercus aquifolioide forest and shrub-bamboo, forest was investigated. The quantitative relationship among the canopy interception, throughfall and the rainfall was analysed, too. The results indicated that the average canopy interception values were 278.2 mm, 362. 1 mm, 353.7 mm, and their rates accounted for 35.77% , 46. 55% , 45.47% of the total annual precipitation in Q. aquifolioide forest, Shrub-bamboo forest and A. faxonian forest, respectively. The stemflow quantity and rate of A. faxonian forest were 5. 9mm and 0.76% , respectively. The canopy throughfall of three types of forest communities accounted for 53.77% ,53.45% and 64. 23% , respectively. The regression models among the canopy interception, throughfall and the rainfall were established to evaluate the eco-hydrological effects of subalpine forests and the basis of natural forest conservation and management in this area.