基于不同土壤转换函数的土壤水分运移模拟对比研究

Comparative study of soil water transport simulation based on different pedotransfer functions

陈思源 ¹王云权 ¹齐鹏飞 ¹孙自永¹

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作者信息

1. 中国地质大学(武汉),湖北武汉,430074
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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.

Abstract

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.

关键词

土壤水分运移/土壤转换函数/BC模型/VGM模型/HYDRUS-1D

Key words

soil water transport/pedotransfer functions/BC model/VGM model/HYDRUS-1D

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出版年

2024

地质学报

中国地质学会

地质学报

CSTPCDCSCD北大核心

影响因子：2.17

ISSN：0001-5717

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