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Distributed modeling of ecohydrological processes at high spatial resolution over a landscape having patches of managed forest stands and crop fields in SW Europe

hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorGOVIND, Ajit
hal.structure.identifierUniversity of Toronto
dc.contributor.authorCOWLING, Sharon
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
hal.structure.identifierUniversity of Kerala [UoK]
dc.contributor.authorKUMARI, Jyothi
hal.structure.identifierTexas A&M University System
dc.contributor.authorRAJAN, Nythia
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorAL-YAARI, Amen
dc.date.accessioned2024-04-08T12:03:08Z
dc.date.available2024-04-08T12:03:08Z
dc.date.issued2015
dc.identifier.issn0304-3800
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/196247
dc.description.abstractEnWe simulated the ecohydrological processes of a forest-dominated landscape that comprises of managed maritime pine stands and crops in the Landes de Gascogne region of South West France. We used an improved model called STEPS that describes ecophysiological, biogeochemical and hydrological processes in a tightly coupled and spatially distributed manner, applicable to both pristine and managed ecosystems. Simulated gross primary productivity (GPP) and evapotranspiration (ET) showed large spatial variability over this landscape owing to the heterogeneities inherent in land cover, soil texture, topography and soil hydrology. Croplands (mainly maize) exhibited higher variability GPP (200-2500 gC m(-2) yr(-1)) and ET fluxes (150-800 mm yr(-1)) relative to other land cover types, primarily due to the presence of fallow versus cultivated lands. The pine stands also showed considerable spatial variability in GPP (426-1320 gC m(-2) yr(-1)) and ET,(234-570 mm yr(-1)) but this occurred mainly as a function of stand age and the understory species compositions. Comparison of simulated values with measurements taken at the LeBray stand revealed reasonable model performance for both GPP (R-2 = 0.92, RMSE = 0.77 gC m(-2) day(-1)), ET (R-2 = 0.81, RMSE = 0.52 mm day(-1)) and other ecohydrological indicators. Seasonal patterns of ET fluxes were more dynamic than GPP due to the presence of distinct subcomponent processes that were uniquely governed by several environmental factors. A sensitivity analysis of some parameters that are common to both GPP and ET simulation revealed that the most sensitive parameters were LAI, Omega and g(s),(max). This study will serve as the basis for further research on developing environmental management strategies specific to the Landes de Gascogne region of France.
dc.language.isoen
dc.publisherElsevier
dc.subjectLandes de Gascogne
dc.subjectevapotranspiration
dc.subject.enspatially-distributed ecohydrological modeling
dc.subject.enSTEPS
dc.subject.engross primary production
dc.title.enDistributed modeling of ecohydrological processes at high spatial resolution over a landscape having patches of managed forest stands and crop fields in SW Europe
dc.typeArticle de revue
dc.identifier.doi10.1016/j.ecolmodel.2014.10.019
dc.subject.halSciences de l'environnement/Milieux et Changements globaux
bordeaux.journalEcological Modelling
bordeaux.page126-140
bordeaux.volume297
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-02631805
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02631805v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Ecological%20Modelling&rft.date=2015&rft.volume=297&rft.spage=126-140&rft.epage=126-140&rft.eissn=0304-3800&rft.issn=0304-3800&rft.au=GOVIND,%20Ajit&COWLING,%20Sharon&KUMARI,%20Jyothi&RAJAN,%20Nythia&AL-YAARI,%20Amen&rft.genre=article


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