干旱区生态环境知识资源中心(Arid): Probability Distribution for Water Fluxes in a Heterogeneous Unsaturated Zone Using an Ensemble of 1D Simulations

Arid

DOI	10.1029/2022WR032322
	Probability Distribution for Water Fluxes in a Heterogeneous Unsaturated Zone Using an Ensemble of 1D Simulations
	Weissman, Gal; Dahan, Ofer; Bel, Golan
通讯作者	Weissman, G
来源期刊	WATER RESOURCES RESEARCH
ISSN	0043-1397
EISSN	1944-7973
出版年	2022
卷号	58 期号:10
英文摘要	Groundwater recharge plays an important role in water resource management. In arid and semi-arid areas, the groundwater recharge under agricultural fields constitutes a large portion of the total recharge. Estimating the agricultural recharge is important for groundwater management and assessing contamination risk. However, estimations of the recharge fluxes are difficult due to the soil heterogeneity and the complex nature of the flow processes in the soil. Here, we suggest a new method for estimating the recharge flux probability distribution that accounts for the soil heterogeneity. The method is demonstrated using a unique data set of long-term continuous measurements of water content under an agricultural field. The measurements are used to assign weights to a large ensemble of hydraulic parameter sets. The weights are then used to derive the probability distribution of flux under different agricultural practices. We found that the distribution of the recharge fluxes varies considerably between one annual crop and a cycle of three crops over 2 years. However, the distribution of the fraction of the input water that infiltrates does not vary much between the two practices. Under natural conditions, with no irrigation, the recharge flux is much smaller, and its distribution is narrower. Our approach provides the full probability distribution of fluxes rather than a single expected value of the flux or its mean.
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000863596500001
WOS关键词	SOIL HYDRAULIC PARAMETERS ; DEEP VADOSE ZONE ; GROUNDWATER-RECHARGE ; SPATIAL VARIABILITY ; IRRIGATED AGRICULTURE ; UNCERTAINTY ; FIELD ; FLOW ; CLIMATE ; MODELS
WOS类目	Environmental Sciences ; Limnology ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/394898
推荐引用方式 GB/T 7714	Weissman, Gal,Dahan, Ofer,Bel, Golan. Probability Distribution for Water Fluxes in a Heterogeneous Unsaturated Zone Using an Ensemble of 1D Simulations[J],2022,58(10).
APA	Weissman, Gal,Dahan, Ofer,&Bel, Golan.(2022).Probability Distribution for Water Fluxes in a Heterogeneous Unsaturated Zone Using an Ensemble of 1D Simulations.WATER RESOURCES RESEARCH,58(10).
MLA	Weissman, Gal,et al."Probability Distribution for Water Fluxes in a Heterogeneous Unsaturated Zone Using an Ensemble of 1D Simulations".WATER RESOURCES RESEARCH 58.10(2022).