Comparison of the performance of 22 models describing soil water retention curves from saturation to oven dryness

doi:10.1002/vzj2.20072

	Comparison of the performance of 22 models describing soil water retention curves from saturation to oven dryness
	Du, Chaoyang 1,2
刊名	VADOSE ZONE JOURNAL
	2020
卷号	19 期号:1 页码:20
DOI	10.1002/vzj2.20072
通讯作者	Du, Chaoyang(ducy@igsnrr.ac.cn)
英文摘要	Soil water retention curve (SWRC) is key hydraulic property for vadose zone hydrology. Selected 22 SWRC models with different structures were divided into four types: traditional, single-segment, two-segment, and three-segment models. According to the accuracy and model selection criterion, these models were compared and evaluated using water retention data from saturation to oven dryness of 94 soil samples covering almost all soil types. Among the models, the EG model (exponential model combined with the Groenevelt-Grant model) shows the best performance, but the BC (Brooks-Corey) and VG (van Genuchten) models performed the worst. The relationship between model performance and complexity showed that traditional models with residual water content performed worse than segmental models from saturation to oven dryness, and the segmental models performed worse with an increase in the segment number. In general, models with more parameters perform better, but when the parameter number is greater than five, the model performance gradually worsens due to the equifinality of different parameters. The correlation analysis between soil properties on model performance showed that soil texture has a more significant effect on model performance than bulk density and organic matter content, because the models are primarily affected by their mathematical forms rather than the physical significance of the parameters. Each model picks its limitations and may apply to only one or particular group(s) of soil(s). Therefore, the complementarities of different models may be a great choice to improve SWRC fitting and simulation in arid soil.
资助项目	National Natural Science Foundation of China[41807166] ; Open Research Fund Programof the State Key Laboratory of Water Resources and Hydropower Engineering Science[2016SWG03]
WOS研究方向	Environmental Sciences & Ecology ; Agriculture ; Water Resources
语种	英语
出版者	WILEY
WOS记录号	WOS:000618773300066
资助机构	National Natural Science Foundation of China ; Open Research Fund Programof the State Key Laboratory of Water Resources and Hydropower Engineering Science
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/160663]
专题	中国科学院地理科学与资源研究所
通讯作者	Du, Chaoyang
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 2.Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Peoples R China
推荐引用方式 GB/T 7714	Du, Chaoyang. Comparison of the performance of 22 models describing soil water retention curves from saturation to oven dryness[J]. VADOSE ZONE JOURNAL,2020,19(1):20.
APA	Du, Chaoyang.(2020).Comparison of the performance of 22 models describing soil water retention curves from saturation to oven dryness.VADOSE ZONE JOURNAL,19(1),20.
MLA	Du, Chaoyang."Comparison of the performance of 22 models describing soil water retention curves from saturation to oven dryness".VADOSE ZONE JOURNAL 19.1(2020):20.