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dc.contributor.authorHuang, J
dc.contributor.authorZhou, Y
dc.contributor.authorHou, R
dc.contributor.authorWenninger, J
dc.date.accessioned2017-05-26T02:47:22Z
dc.date.available2017-05-26T02:47:22Z
dc.date.issued2015
dc.identifier.issn2073-4441
dc.identifier.doi10.3390/w7126671
dc.identifier.urihttp://hdl.handle.net/10072/101783
dc.description.abstractThis study analyzed the water use of the Salix psammophila bush in a semi-arid area in northwest China using a Hydrus-1D model. The model incorporated the effect of thermally driven water flow coupling liquid water, water vapor and heat transport. The model was calibrated and validated using hourly field measurements of soil water content and temperature at different depths for a growing season of 154 days. Furthermore, another Hydrus-1D model was established to simulate environments with decreased heat, rainfall or temperature and an increased leaf area index using calibrated and validated parameters. Our results show that upward and downward thermally driven water vapor fluxes account for 0.11% and 0.28%, respectively, of the corresponding direction of total water flux during the bush’s growing season. Although the vapor flux is very small, simulations incorporating heat flow revealed alterations in the temperature and pressure head gradients over the root zone, especially during dry periods. Consequently, the cumulative contributions of groundwater to evapotranspiration (ETg) with heat flow and without heat flow were 26.9% and 40.6%, respectively, during the simulation period. Therefore, the cumulative contribution of groundwater to ETg is overestimated when heat flow is excluded. Thus, we recommended that heat transport be incorporated when evaluating ETg in arid and semi-arid areas.
dc.description.peerreviewedYes
dc.languageEnglish
dc.publisherMDPI Open Access
dc.relation.ispartofpagefrom6999
dc.relation.ispartofpageto7021
dc.relation.ispartofissue12
dc.relation.ispartofjournalWater
dc.relation.ispartofvolume7
dc.subject.fieldofresearchHydrogeology
dc.subject.fieldofresearchcode040603
dc.titleSimulation of water use dynamics by Salix bush in a semiarid shallow groundwater area of the Chinese Erdos Plateau
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dcterms.licensehttp://creativecommons.org/licenses/by/4.0/
gro.rights.copyright© 2015 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons by Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
gro.hasfulltextFull Text
gro.griffith.authorHou, Rongzhe


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