The performance of the reformulated Gash's interception loss model in Mexico's northeastern temperate forests
The performance of the reformulated Gash's interception loss model in Mexico's northeastern temperate forests
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DOI：
10.1002/hyp.9309
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发表时间：
2013-05
影响因子：
3.2
通讯作者：
J. Návar
中科院分区：
文献类型：
--
作者：
J. Návar
在墨西哥东北部温带森林群落中，对降雨截留损失的数量重要性和改进的Gash模型的性能作为断面积的函数进行了评估。敏感性分析以及参数的迭代搜索匹配了拦截损失测量和评估，以及驱动模型性能的孤立系数值。对SET假设进行了检验，共记录了4个不同郁闭度林分的73次降雨量，以进行模型拟合(39次)和验证(34次)。改进后的Gash模型预测了较好的降雨截留损失，因为对于参数数据集的拟合和验证，记录的截留损失与模拟的截留损失之间作为总降雨量MD的函数的平均偏差分别为<；2.6%和5.3%。截留损失与林冠截留损失呈负相关，但在大多数截留损失研究中都可以找到最大的MD值，例如，当截留面积为-lt；5m2 ha−1时，截留损失的预测值为-lt；7%。林冠蒸发湿速率和林冠储存系数驱动截留损失，迭代参数搜索表明，这些森林的林冠蒸发率较高。必须进一步研究这些参数，以便从物理上解释高湿冠层蒸发率的驱动因素。版权所有©2012 John Wiley&Sons，Ltd.
The quantitative importance of rainfall interception loss and the performance of the reformulated Gash model were evaluated as a function of basal area in Mexico's northeastern temperate forest communities. A sensitivity analysis as well as an iterative search of parameters matched interception loss measurements and assessments and isolated coefficient values that drive the model performance. Set hypothesis was tested with a total of 73 rainfalls recorded on four forest stands with different canopy cover for model fitting (39) and validation (34). The reformulated Gash model predicted well rainfall interception loss because mean deviations between recorded and modelled interception loss as a function of gross rainfall, MD, were <2.6% and 5.3% for fitting and validating parameter data sets, respectively. Basal area was negatively related to the model performance, but maximum projected MD range values can be found in most interception loss studies, for example, <7% when basal area is <5 m2 ha−1. The wet canopy evaporation rate and the canopy storage coefficient drive interception loss and the iterative parameter search showed that high wet canopy evaporation rates were expected in these forests. These parameters must be further studied to physically explain drivers of high wet canopy evaporation rates. Copyright © 2012 John Wiley & Sons, Ltd.