摘要
利用2005—2008年辽东山区落叶松人工林林冠降雨截留观测数据,并选取Gash解析模型模拟林冠截留过程.结果表明:落叶松人工林林内穿透雨量与林外降雨量呈显著正相关关系(R2=0.98),年均穿透雨量占总降雨量的77.64%;林冠截留量与降雨量和降雨强度之间呈正相关关系;除2007年由于降雨间隔时间短导致模拟截留量大于实测截留量外,模型模拟的林冠截留量均小于实测林冠截留量;模型模拟的绝对误差与林外降水量呈负指数相关,为1.26%～68.96%,平均值为29.09%;模拟值与实测值之间的相关系数为0.91,模型模拟结果与实测结果相吻合.
Based on the 2005 -2008 observation data of canopy interception in larch plantation in eastern Liaoning Province,and by using Gash model,the interception process was simulated. In the plantation,there was a significant positive correlation between throughfall and rainfall （ R2 = 0. 98） ,and the annual throughfall accounted for 77. 64% of the total rainfall. The canopy interception was positively correlated with rainfall and its intensity. The canopy interception simulated by Gash model was lower than the measured values,except for the results in 2007 because of the short intervals between rainfalls. The absolute error of simulated values had a negative exponential correlation with rainfall,and the range was 1. 26% -68. 96% ,and the mean value was 29. 09% . The estimated values were almost equal to the measured values,with the correlation coefficient being 0. 91.
出处
《应用生态学报》
CAS
CSCD
北大核心
2010年第12期3021-3028,共8页
Chinese Journal of Applied Ecology
基金
国家重点基础研究发展规划项目(2009CB421101)
中国科学院知识创新工程重要方向项目(KZCX2-YW-Q06-2-1)
林业公益性行业科研专项(200804001)资助
