干旱区生态环境知识资源中心(Arid): Modeling near-surface water redistribution in a desert soil

Arid

DOI	10.1002/vzj2.20081
	Modeling near-surface water redistribution in a desert soil
	Luo, Yuan; Ghezzehei, Teamrat A.; Yu, Zhongbo; Berli, Markus
通讯作者	Berli, M (corresponding author), Desert Res Inst, Div Hydrol Sci, 755 E Flamingo Rd, Las Vegas, NV 89119 USA.
来源期刊	VADOSE ZONE JOURNAL
EISSN	1539-1663
出版年	2020
卷号	19 期号:1
英文摘要	Despite the vast extent of desert soils on the earth's surface, our understanding of the moisture dynamics of near-surface desert soils (i.e., the top centimeters to few meters of the soil profile) remain limited. The goal of this study was to explore the use of the Peters-Durner-Iden (or PDI) instead of bimodal van Genuchten (or BVG) hydraulic functions to improve water redistribution simulations using HYDRUS-1D for drier soils in desert environments. The PDI hydraulic functions take capillary and film flow into account, whereas BVG hydraulic functions are limited to capillary flow. By comparing measured with simulated water content data, we found that moisture redistribution simulations were improved by using PDI instead of BVG soil water retention and hydraulic conductivity functions. Compared with the BVG simulations, the PDI simulations particularly improved for drier soil conditions (i.e., volumetric water contents ranging from 6 to 10%; suction heads between pF 2 and pF 3.8, and saturation degrees between 19 and 32%, respectively) for the studied sandy soil of Scaling Environmental Processes in Heterogeneous Arid Soils (SEPHAS) Lysimeter 1. For pF >3, the PDI functions predicted higher hydraulic conductivity than the BVG functions, which confirmed the hypothesis that a hydraulic conductivity function, which can capture film flow, may improve moisture distribution simulations for dry soils. For pF between 2 and 3, however, simulation results improved due to the difference in the water retention rather than the hydraulic conductivity function.
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000618773300074
WOS关键词	SIMPLE CONSISTENT MODELS ; HYDRAULIC CONDUCTIVITY ; EVAPORATION ; RETENTION
WOS类目	Environmental Sciences ; Soil Science ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Agriculture ; Water Resources
来源机构	河海大学 ; Desert Research Institute
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349214
作者单位	[Luo, Yuan; Berli, Markus] Desert Res Inst, Div Hydrol Sci, 755 E Flamingo Rd, Las Vegas, NV 89119 USA; [Ghezzehei, Teamrat A.] Univ Calif, Dept Life & Environm Sci, Merced, CA 95343 USA; [Yu, Zhongbo] Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing, Peoples R China
推荐引用方式 GB/T 7714	Luo, Yuan,Ghezzehei, Teamrat A.,Yu, Zhongbo,et al. Modeling near-surface water redistribution in a desert soil[J]. 河海大学, Desert Research Institute,2020,19(1).
APA	Luo, Yuan,Ghezzehei, Teamrat A.,Yu, Zhongbo,&Berli, Markus.(2020).Modeling near-surface water redistribution in a desert soil.VADOSE ZONE JOURNAL,19(1).
MLA	Luo, Yuan,et al."Modeling near-surface water redistribution in a desert soil".VADOSE ZONE JOURNAL 19.1(2020).