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Quantification of ecohydrological sensitivities and their influencing factors at the seasonal scale

hal.structure.identifierUniversity of Electronic Science and Technology of China [Chengdu] [UESTC]
hal.structure.identifierUniversity of British Columbia [Canada] [UBC]
dc.contributor.authorHOU, Yiping
hal.structure.identifierUniversity of Electronic Science and Technology of China [Chengdu] [UESTC]
dc.contributor.authorZHANG, Mingfang
hal.structure.identifierUniversity of British Columbia [Canada] [UBC]
dc.contributor.authorWEI, Xiaohua
hal.structure.identifierChinese Academy of Forestry
dc.contributor.authorLIU, Shirong
hal.structure.identifierNorthwest A and F University
dc.contributor.authorLI, Qiang
hal.structure.identifierNortheast Forestry University
dc.contributor.authorCAI, Tijiu
hal.structure.identifierNanchang Institute of Technology
dc.contributor.authorLIU, Wenfei
hal.structure.identifierUniversity of Electronic Science and Technology of China [Chengdu] [UESTC]
dc.contributor.authorZHAO, Runqi
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
hal.structure.identifierUniversity of Electronic Science and Technology of China [Chengdu] [UESTC]
dc.contributor.authorLIU, Xiangzhuo
dc.date.accessioned2024-04-08T11:51:44Z
dc.date.available2024-04-08T11:51:44Z
dc.date.issued2021
dc.identifier.issn1027-5606
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/195442
dc.description.abstractEnEcohydrological sensitivity, defined as the response intensity of streamflow to per unit vegetation change is an integrated indicator for assessing hydrological sensitivity to vegetation change. Understanding ecohydrological sensitivity and its influencing factors is crucial for managing water supply, reducing water-related hazards and ensuring aquatic functions by vegetation management. Yet, there is still a systematic assessment on ecohydrological sensitivity and associated driving factors especially at a seasonal scale lacking. In this study, 14 large watersheds across various environmental gradients in China were selected to quantify their ecohydrological sensitivities at a seasonal scale and to examine the role of associated influencing factors such as climate, vegetation, topography, soil and landscape. Based on the variables identified by correlation analysis and factor analysis, prediction models of seasonal ecohydrological sensitivity were constructed to test their utilities for the design of watershed management and protection strategies. Our key findings were the following: (1) ecohydrological sensitivities were more sensitive under dry conditions than wet conditions – for example, 1 % LAI (leaf area index) change, on average, induced 5.05 % and 1.96 % change in the dry and wet season streamflow, respectively; (2) seasonal ecohydrological sensitivities were highly variable across the study watersheds with different climate conditions, dominant soil types and hydrological regimes; and (3) the dry season ecohydrological sensitivity was mostly determined by topography (slope, slope length, valley depth and downslope distance gradient), soil (topsoil organic carbon and topsoil bulk density) and vegetation (LAI), while the wet season ecohydrological sensitivity was mainly controlled by soil (topsoil-available water-holding capacity), landscape (edge density) and vegetation (leaf area index). Our study provided a useful and practical framework to assess and predict ecohydrological sensitivities at the seasonal scale. The established ecohydrological sensitivity prediction models can be applied to ungauged watersheds or watersheds with limited hydrological data to help decision makers and watershed managers effectively manage hydrological impacts through vegetation restoration programs. We conclude that ecohydrological sensitivities at the seasonal scale are varied by climate, vegetation and watershed property, and their understanding can greatly support the management of hydrological risks and protection of aquatic functions.
dc.language.isoen
dc.publisherEuropean Geosciences Union
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.title.enQuantification of ecohydrological sensitivities and their influencing factors at the seasonal scale
dc.typeArticle de revue
dc.identifier.doi10.5194/hess-25-1447-2021
dc.subject.halSciences de l'environnement
bordeaux.journalHydrology and Earth System Sciences
bordeaux.page1447-1466
bordeaux.volume25
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.issue3
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-03201583
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03201583v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Hydrology%20and%20Earth%20System%20Sciences&rft.date=2021&rft.volume=25&rft.issue=3&rft.spage=1447-1466&rft.epage=1447-1466&rft.eissn=1027-5606&rft.issn=1027-5606&rft.au=HOU,%20Yiping&ZHANG,%20Mingfang&WEI,%20Xiaohua&LIU,%20Shirong&LI,%20Qiang&rft.genre=article


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