摘要
土壤水力参数是土壤水分运移模拟的关键输入。在野外应用中,土壤水力参数一般由土壤转换函数(PTF)基于土壤质地信息估计获取。为了对比分析不同PTF对土壤水分运移模拟的影响,本文选取了八个常用的PTF,基于七个FLUXNET中的站点,利用HYDRUS-1D软件开展了土壤水分运移的模拟。结果表明,使用不同的PTF会导致预测结果的显著差异。对于VGM模型,Rosetta3是最稳定的PTF;对于BC模型,Cosby2是最稳定的PTF。基于本文的模拟结果,不同PTF应该在模型中比较使用,以避免由于PTF的选择而带来的不确定性。
In soil hydraulic models,the input of hydraulic parameters is an important reason for differences in model results,and these soil hydraulic characteristics can be estimatedusing pedotransfer functions(PTF).To analyze the performance of different PTF,the soil water content at seven FLUXNET sites was simulated and predicted using the VGM model and the BC model within the HYDRUS-1D framework.The results showed that using different PTF led to significant differences in the predicted results.For the VGM model,Rosetta3 was the most stable PTF;for the BC model,Cosby2 was the most stable PTF.Based on the simulation results of this study,different PTF should be compared within a model to avoid the uncertainty caused by PTF selection.
作者
陈思源
王云权
齐鹏飞
孙自永
CHEN Siyuan;WANG Yunquan;QI Pengfei;SUN Ziyong(China University of Geosciences,Wuhan,Hubei 430074,China)
出处
《地质学报》
EI
CAS
CSCD
北大核心
2024年第11期3433-3440,共8页
Acta Geologica Sinica
基金
国家自然科学基金地质联合基金“北方农牧交错带生态退化的地质-生态-水文耦合机制与生态承载力阈值识别”项目(编号U2244230)资助的成果。