北京密云油松人工林林冠降水截留特征研究  

Rainfall interception capacity of a Pinus tabulaeformis plantation in Miyun,Beijing.

作　　者：卢俊峰[1] 马钦彦[1] 刘世海[2] 田平[1] 陈圆[1] 

机构地区：[1]北京林业大学省部共建森林培育与保护教育部重点实验室 [2]北京交通大学土木建筑工程学院

出　　处：《北京林业大学学报》2005年第S2期129-132,共4页Journal of Beijing Forestry University

基　　金：国家自然科学基金项目(50409006);(90302014);"863"国家高新技术项目(2003AA245030);北京市自然科学基金重点项目(4041002)

摘　　要：该文对密云水库集水区油松人工林林冠截留的规律进行了研究,尝试用合适的统计模型和概念模型描述单场降雨下林冠截留量与降水量的关系.通过在油松试验地外测定大气降雨量,在林内测定穿透雨量和树干茎流量,得出了在不同降雨量和降雨强度下的林冠截留量.结果显示:以S型曲线作为统计模型能很好地模拟降雨量与截留量的关系;比较简单的概念模型的模拟效果最好,其中的降雨蒸发率α和林冠吸附降雨容量Im的参考数值分别为0.025和3.297 mm;把降雨强度加入半理论模型,可以得出截流量与降雨强度成负相关关系.The interception capacity of a Pinus tabulaeformis plantation in Miyun Reservoir Watershed was studied,with an effort to apply appropriate statistical and theoritical models to describe the relationship between interception and rainfall.After the measurement of rainfall outside the P.tabulaeformis forest and throughfall and stem flow in the forest,the canopy interception under various rainfalls and rainfalls intensities was calculated. It can be inferred that among various statistical models S curve can serve as an appropriate model.A simplified theoretical model was advanced,with better effects than that of statistical models.The parameters about the evaporation rate of intercepted water α and the absorption capacity I_m were suggested to be 0.025 and 3.297 mm.From the semi-theoretical model advanced,it can be concluded that the relationship between interception and rainfall intensity is negative.

关 键 词：油松人工林 林冠截留降雨 模型转换 模型参数 

分 类 号：S791.254[农业科学—林木遗传育种] S715[农业科学—林学]