Development of pedotransfer functions for soil hydraulic properties in the critical zone on the Loess Plateau, China

doi:10.1002/hyp.13216

	Development of pedotransfer functions for soil hydraulic properties in the critical zone on the Loess Plateau, China
	Qiao, Jiangbo 1; Zhu, Yuanjun 2; Jia, Xiaoxu 3; Huang, Laiming 3; Shao, Ming'an 2,3
刊名	HYDROLOGICAL PROCESSES
	2018-08-30
卷号	32 期号:18 页码:2915-2921
关键词	Earth's critical zone Loess Plateau pedotransfer functions soil hydraulic properties
ISSN号	0885-6087
DOI	10.1002/hyp.13216
通讯作者	Zhu, Yuanjun(zhuyuanjun@foxmail.com)
英文摘要	Soil hydraulic properties (SHPs) including the soil water retention curve and saturated soil hydraulic conductivity (Ks) are crucial input data for simulations of soil water and solute transport in the Earth's critical zone. However, obtaining direct measurements of SHPs at a wide range of scales is time consuming and expensive. Pedotransfer functions (PTFs) are employed as an alternative method for indirectly estimating these parameters based on readily measured soil properties. However, PTFs for SHPs for the deep soil layer in the Earth's critical zone are lacking. In this study, we developed new PTFs in the deep soil profile for Ks and soil water retention curve on the Loess Plateau, China, which were fitted with the van Genuchten equation. In total, 206 data sets comprising the hydraulic and basic soil properties were obtained from three typical sites. Samples were collected from the top of the soil profile to the bedrock by soil core drilling. PTFs were developed between the SHPs and basic soil properties using stepwise multiple linear regression. The PTFs obtained the best predictions for Ks (R-adj(2)=0.561) and the worst for van Genuchten (R-adj(2)=0.474). The bulk density and sand content were important input variables for predicting Ks, , and s, and bulk density, clay content, and soil organic carbon were important for n. The PTFs developed in this study performed better than existing PTFs. This study contains the first set of PTFs of SHPs to be developed for the deep profile on the Loess Plateau, and they may be applicable to other regions.
资助项目	Key Deployment Project of the Chinese Academy[KFZD-SW-306] ; National Natural Science Foundation of China[41530854] ; National Natural Science Foundation of China[41371242] ; international cooperation programme between China and England[41571130081]
WOS关键词	WATER RETENTION CHARACTERISTICS ; PEDO-TRANSFER FUNCTIONS ; BULK-DENSITY ; CONDUCTIVITY
WOS研究方向	Water Resources
语种	英语
出版者	WILEY
WOS记录号	WOS:000442343500010
资助机构	Key Deployment Project of the Chinese Academy ; National Natural Science Foundation of China ; international cooperation programme between China and England
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/54422]
专题	中国科学院地理科学与资源研究所
通讯作者	Zhu, Yuanjun
作者单位	1.Northwest A&F Univ, Coll Resources & Environm, Yangling, Shaanxi, Peoples R China 2.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Agr Loess Plate, Yangling 712100, Shaanxi, Peoples R China 3.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Qiao, Jiangbo,Zhu, Yuanjun,Jia, Xiaoxu,et al. Development of pedotransfer functions for soil hydraulic properties in the critical zone on the Loess Plateau, China[J]. HYDROLOGICAL PROCESSES,2018,32(18):2915-2921.
APA	Qiao, Jiangbo,Zhu, Yuanjun,Jia, Xiaoxu,Huang, Laiming,&Shao, Ming'an.(2018).Development of pedotransfer functions for soil hydraulic properties in the critical zone on the Loess Plateau, China.HYDROLOGICAL PROCESSES,32(18),2915-2921.
MLA	Qiao, Jiangbo,et al."Development of pedotransfer functions for soil hydraulic properties in the critical zone on the Loess Plateau, China".HYDROLOGICAL PROCESSES 32.18(2018):2915-2921.