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Modeling canopy rainfall interception of a tropical seasonal rainforest in Xishuangbanna, Southwest China
Author(s): WANG Xin, ZHANG Yi-Ping, LIU Wen-Jie
Pages: 722-
729
Year: 2006
Issue:
3
Journal: ACTA ECOLOGICA SINICA
Keyword: Gash模型; 林冠截留; 热带季节雨林;
Abstract: 为了验证Gash林冠截留解析模型在西双版纳热带季节雨林中的适用性,基于2003年的热带季节雨林气候及林冠特征观测数据、采用Gash模型对林冠截留进行了模拟.结果显示,西双版纳热带季节雨林样地年降雨量为1244.4mm,穿透降雨为867.3mm,树干径流为114.4mm,树冠截留量为262,7mm,林内穿透降雨量和林外降雨量之间存在显著的正相关关系;降雨过程中饱和林冠的蒸发强度为0.12mm/h,使林冠饱和的降雨为0.6mm,林冠枝叶部分持水能力为0.41mm,树干持水能力为0.18mm;模型模拟的年林冠截留量为274.9mm,干季为71.7 mm,雨季为203.1 mm;模拟的相对误差年值为4.3%,干季为0.1%,雨季为6.9%,模拟与实测有很好的一致性,显示了Gash模型适用于西双版纳地区热带季节雨林林冠截留计算.
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