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地理科学  2013 

基于COUPMODEL模型的冻融土壤水热耦合模拟研究

, PP. 356-362

Keywords: COUPMODEL模型,土壤温度,土壤水分,多年冻土

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Abstract:

利用COUPMODEL模型,对唐古拉研究区活动层土壤的水热特征进行模拟,与观测结果进行对比发现,在活动层土壤温度方面,COUPMODEL模型的模拟结果R2>0.94,其平均值为0.98,均方根误差较小,模拟效果较理想;在活动层水分特征方面,模拟结果存在一定偏差,R2介于0.88~0.93之间,平均值0.90,均方根误差平均值4.24,基本反映了高海拔多年冻土区活动层水热变化;在土壤热通量方面,0~20cm土壤热通量的模拟结果与观测值基本一致;模型模拟的冻结深度在3m左右,接近观测值,COUPMODEL模型可用于多年冻土区活动层土壤水热变化规律研究。

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