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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.
Rainfall interception data of Larix gmelinii canopy were collected from the mountainous areas of eastern Liaoning in 2005-2008, and the Gap analysis model was used to simulate the interception of canopy.The results showed that there was a significant positive correlation between the rainfall in forest and the rainfall in forest = 0.98). The average annual rainfall was 77.64% of the total rainfall. There was a positive correlation between canopy interception and rainfall and rainfall intensity. In addition to the fact that the simulated interception was larger than the actual interception, The canopy interception of the model was less than the measured canopy interception. The absolute error of model simulation was negatively correlated with the precipitation outside the forest, ranging from 1.26% to 68.96%, with an average of 29.09%. The correlation between simulated and measured values Coefficient of 0.91, model simulation results and measured results are consistent.