Capacity and Distribution of Water Stored in the Vadose Zone of the Chinese Loess Plateau

dc.contributor.author Zhu, Yuanjun
dc.contributor.author Jia, Xiaoxu
dc.contributor.author Horton, Robert
dc.contributor.author Qiao, Jiangbo
dc.contributor.author Binley, Andrew
dc.contributor.author Horton, Robert
dc.contributor.author Hu, Wei
dc.contributor.author Wang, Yunqiang
dc.contributor.author Shao, Ming’an
dc.contributor.department Agronomy
dc.date 2021-09-22T17:20:24.000
dc.date.accessioned 2021-11-05T16:11:29Z
dc.date.available 2021-11-05T16:11:29Z
dc.date.copyright Tue Jan 01 00:00:00 UTC 2019
dc.date.issued 2019-10-03
dc.description.abstract <p>Water stored in the vadose (unsaturated) zone provides the majority of water required by plants and buffers water resources; thus, it is central to understanding ecological and hydrological processes in the Chinese Loess Plateau (CLP) with its thick loess deposits. We used multisource data on soil water content (SWC) and vadose zone thickness, combined with a spatial interpolation method, to quantify the vadose zone water and further deduce the water resource composition in the CLP. Vadose zone water is approximately 3.1 times 10<sup>12</sup> m<sup>3</sup> (plus/minus 27.5%) in the CLP, 92.4% of which is stored in the deep vadose zone (>5 m and above the groundwater table). The water resources composition of the CLP comprises precipitation, river water, vadose zone water, and the saturated zone water (shallow groundwater), accounting for 2.1, 0.1, 42.1, and 55.7%, respectively. Although a large amount of water exists in the vadose zone, the SWCs in the upper (m) and deep vadose zones are 47.4 and 65.3%, respectively, of the mean field capacity, both being at a low level. Our findings bridge the knowledge gaps on the deep vadose zone water and water resources composition in the CLP, providing the basis for decision-making on balancing revegetation and water resources conservation.</p>
dc.description.comments <p>This article is published as Zhu, Y., X. Jia, J. Qiao, A. Binley, R. Horton, W. Hu, Y. Wang, and M. Shao. 2019. Capacity and distribution of water stored in the vadose zone of the Chinese Loess Plateau. Vadose Zone J. 18:180203. doi: <a href="http://dx.doi.org/10.2136/vzj2018.11.0203" target="_blank">10.2136/vzj2018.11.0203</a>.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/agron_pubs/594/
dc.identifier.articleid 1643
dc.identifier.contextkey 15523158
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath agron_pubs/594
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/8zn7YEAw
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/agron_pubs/594/2019_Horton_CapacityDistribution.pdf|||Sat Jan 15 01:04:08 UTC 2022
dc.source.uri 10.2136/vzj2018.11.0203
dc.subject.disciplines Agriculture
dc.subject.disciplines Hydrology
dc.subject.disciplines Natural Resources and Conservation
dc.subject.disciplines Soil Science
dc.subject.disciplines Terrestrial and Aquatic Ecology
dc.title Capacity and Distribution of Water Stored in the Vadose Zone of the Chinese Loess Plateau
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication d3fb0917-6868-417e-9695-a010896cfafa
relation.isOrgUnitOfPublication fdd5c06c-bdbe-469c-a38e-51e664fece7a
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