GovindChenMargolisEtAl2009

Référence

Govind, A., Chen, J.M., Margolis, H., Ju, W., Sonnentag, O., Giasson, M.-A. (2009) A spatially explicit hydro-ecological modeling framework (BEPS-TerrainLab V2.0): Model description and test in a boreal ecosystem in Eastern North America. Journal of Hydrology, 367(3-4):200-216. (Scopus )

Résumé

A spatially explicit, process-based hydro-ecological model, BEPS-TerrainLab V2.0, was developed to improve the representation of ecophysiological, hydro-ecological and biogeochemical processes of boreal ecosystems in a tightly coupled manner. Several processes unique to boreal ecosystems were implemented including the sub-surface lateral water fluxes, stratification of vegetation into distinct layers for explicit ecophysiological representation, inclusion of novel spatial upscaling strategies and biogeochemical processes. To account for preferential water fluxes common in humid boreal ecosystems, a novel scheme was introduced based on laboratory analyses. Leaf-scale ecophysiological processes were upscaled to canopy-scale by explicitly considering leaf physiological conditions as affected by light and water stress. The modified model was tested with 2 years of continuous measurements taken at the Eastern Old Black Spruce Site of the Fluxnet-Canada Research Network located in a humid boreal watershed in eastern Canada. Comparison of the simulated and measured ET, water-table depth (WTD), volumetric soil water content (VSWC) and gross primary productivity (GPP) revealed that BEPS-TerrainLab V2.0 simulates hydro-ecological processes with reasonable accuracy. The model was able to explain 83% of the ET, 92% of the GPP variability and 72% of the WTD dynamics. The model suggests that in humid ecosystems such as eastern North American boreal watersheds, topographically driven sub-surface baseflow is the main mechanism of soil water partitioning which significantly affects the local-scale hydrological conditions. © 2009 Elsevier B.V. All rights reserved.

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@ARTICLE { GovindChenMargolisEtAl2009,
    AUTHOR = { Govind, A. and Chen, J.M. and Margolis, H. and Ju, W. and Sonnentag, O. and Giasson, M.-A. },
    TITLE = { A spatially explicit hydro-ecological modeling framework (BEPS-TerrainLab V2.0): Model description and test in a boreal ecosystem in Eastern North America },
    JOURNAL = { Journal of Hydrology },
    YEAR = { 2009 },
    VOLUME = { 367 },
    NUMBER = { 3-4 },
    PAGES = { 200-216 },
    NOTE = { cited By 29 },
    ABSTRACT = { A spatially explicit, process-based hydro-ecological model, BEPS-TerrainLab V2.0, was developed to improve the representation of ecophysiological, hydro-ecological and biogeochemical processes of boreal ecosystems in a tightly coupled manner. Several processes unique to boreal ecosystems were implemented including the sub-surface lateral water fluxes, stratification of vegetation into distinct layers for explicit ecophysiological representation, inclusion of novel spatial upscaling strategies and biogeochemical processes. To account for preferential water fluxes common in humid boreal ecosystems, a novel scheme was introduced based on laboratory analyses. Leaf-scale ecophysiological processes were upscaled to canopy-scale by explicitly considering leaf physiological conditions as affected by light and water stress. The modified model was tested with 2 years of continuous measurements taken at the Eastern Old Black Spruce Site of the Fluxnet-Canada Research Network located in a humid boreal watershed in eastern Canada. Comparison of the simulated and measured ET, water-table depth (WTD), volumetric soil water content (VSWC) and gross primary productivity (GPP) revealed that BEPS-TerrainLab V2.0 simulates hydro-ecological processes with reasonable accuracy. The model was able to explain 83% of the ET, 92% of the GPP variability and 72% of the WTD dynamics. The model suggests that in humid ecosystems such as eastern North American boreal watersheds, topographically driven sub-surface baseflow is the main mechanism of soil water partitioning which significantly affects the local-scale hydrological conditions. © 2009 Elsevier B.V. All rights reserved. },
    AFFILIATION = { Department of Geography, University of Toronto, 100 George Street, Room 5047, Toronto, Ont., Canada; Department of Forest Ecosystems and Society, Oregon State University, OR, United States; Faculté de Foresterie et Géomatique, Université Laval, Que., Canada; Centre d'Étude de la Forêt (CEF), Que., Canada; International Institute for Earth System Sciences, Nanjing University, China; Department of Environmental Sciences, Policy and Management, University of California, Berkley, CA, United States },
    AUTHOR_KEYWORDS = { Boreal ecosystems; Evapotranspiration; Gross primary productivity; Spatially explicit hydro-ecological model; Sub-surface baseflow },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1016/j.jhydrol.2009.01.006 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-61749084635&doi=10.1016%2fj.jhydrol.2009.01.006&partnerID=40&md5=5ceb7eb3c790e2cb99e86519fbfbb14d },
}

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