黄土高原半干旱区油松人工林林冠截留模型及其参数特征研究

Study on Canopy Interception Model and Its Parameter Characteristics of Pinus tabulaeformis Artificial Plantation in the Loess Plateau

利用2008—2011年定位观测数据,采用回归分析方法对黄土高原半干旱区油松人工林林冠截留与林外降雨之间的关系进行建模研究,并运用Bootstrap方法,对模型参数特征进行分析。结果表明:林冠截留量(I)与林外降雨量(P)可用非线性模型I=a Pb进行回归模拟,回归方程为I=0.584P0.576;该模型不仅具有较高的拟合精度,且拟合方程参数稳定性良好,经检验,方程均达到显著性要求,可在该区域油松人工林应用。

Based on the data deriving from 2008 to 2011 observed in the field, by using regression analysis, the re- lationship between rainfall and canopy interception of Pinus tabulaeformis plantation planted in the Loess Plateau was analyzed, and the regression parameters of the model were studied by the method of bootstrap. The results showed that both of the relationships could be analyzed by the nonlinear model I = aPb, which could be exactly expressed by I =0. 584P0.576. This model not only had high fitting accuracy, but also the fitting parameters had good stability. The model could meet the requirement for significance, so it is feasible to be applied for the study areas.