A REVISED VERSION OF PnET-II TO SIMULATE THE HYDROLOGIC CYCLE IN SOUTHEASTERN FORESTED AREAS
The PnET-II model uses hydroclimatic data on maximum and minimum temperatures, precipitation, and solar radiation, together with vegetation and soil parameters, to produce estimates of net primary productivity, evapotranspiration (ET), and runoff on a monthly time step for forested areas. In this st...
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Veröffentlicht in: | Journal of the American Water Resources Association 2002-02, Vol.38 (1), p.79-89 |
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description | The PnET-II model uses hydroclimatic data on maximum and minimum temperatures, precipitation, and solar radiation, together with vegetation and soil parameters, to produce estimates of net primary productivity, evapotranspiration (ET), and runoff on a monthly time step for forested areas. In this study, the PnET-II model was employed to simulate the hydrologic cycle for 17 Southeastern eight-digit hydrologic unit code (HUC) watersheds dominated by evergreen or deciduous tree species. Based on these control experiments, model biases were quantified and tentative revision schemes were introduced. Revisions included: (1) replacing the original single soil layer with three soil layers in the water balance routine; (2) introducing calibrating factors to rectify the phenomenon of overestimation of ET in spring and early summer months; (3) parameterizing proper values of growing degree days for trees located in different climate zones; and (4) adjusting the parameter of fast-flow (overland flow) fraction based on antecedent moisture condition and precipitation intensity. The revised PnET-II model, called PnET-II3SL in this work, substantially improved runoff simulations for the 17 selected experimental sites, and therefore may offer a more powerful tool to address issues in water resources management. |
doi_str_mv | 10.1111/j.1752-1688.2002.tb01536.x |
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Rocky ; Lightsey, Trey</creator><creatorcontrib>Liang, Yiguo ; Durrans, S. Rocky ; Lightsey, Trey</creatorcontrib><description>The PnET-II model uses hydroclimatic data on maximum and minimum temperatures, precipitation, and solar radiation, together with vegetation and soil parameters, to produce estimates of net primary productivity, evapotranspiration (ET), and runoff on a monthly time step for forested areas. In this study, the PnET-II model was employed to simulate the hydrologic cycle for 17 Southeastern eight-digit hydrologic unit code (HUC) watersheds dominated by evergreen or deciduous tree species. Based on these control experiments, model biases were quantified and tentative revision schemes were introduced. Revisions included: (1) replacing the original single soil layer with three soil layers in the water balance routine; (2) introducing calibrating factors to rectify the phenomenon of overestimation of ET in spring and early summer months; (3) parameterizing proper values of growing degree days for trees located in different climate zones; and (4) adjusting the parameter of fast-flow (overland flow) fraction based on antecedent moisture condition and precipitation intensity. The revised PnET-II model, called PnET-II3SL in this work, substantially improved runoff simulations for the 17 selected experimental sites, and therefore may offer a more powerful tool to address issues in water resources management.</description><identifier>ISSN: 1093-474X</identifier><identifier>EISSN: 1752-1688</identifier><identifier>DOI: 10.1111/j.1752-1688.2002.tb01536.x</identifier><identifier>CODEN: JWRAF5</identifier><language>eng</language><publisher>Oxford, UK: Blackwell Publishing Ltd</publisher><subject>climate variability ; Earth sciences ; Earth, ocean, space ; Exact sciences and technology ; hydrologic cycle ; Hydrology ; Hydrology. 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Rocky</creatorcontrib><creatorcontrib>Lightsey, Trey</creatorcontrib><title>A REVISED VERSION OF PnET-II TO SIMULATE THE HYDROLOGIC CYCLE IN SOUTHEASTERN FORESTED AREAS</title><title>Journal of the American Water Resources Association</title><description>The PnET-II model uses hydroclimatic data on maximum and minimum temperatures, precipitation, and solar radiation, together with vegetation and soil parameters, to produce estimates of net primary productivity, evapotranspiration (ET), and runoff on a monthly time step for forested areas. In this study, the PnET-II model was employed to simulate the hydrologic cycle for 17 Southeastern eight-digit hydrologic unit code (HUC) watersheds dominated by evergreen or deciduous tree species. Based on these control experiments, model biases were quantified and tentative revision schemes were introduced. Revisions included: (1) replacing the original single soil layer with three soil layers in the water balance routine; (2) introducing calibrating factors to rectify the phenomenon of overestimation of ET in spring and early summer months; (3) parameterizing proper values of growing degree days for trees located in different climate zones; and (4) adjusting the parameter of fast-flow (overland flow) fraction based on antecedent moisture condition and precipitation intensity. The revised PnET-II model, called PnET-II3SL in this work, substantially improved runoff simulations for the 17 selected experimental sites, and therefore may offer a more powerful tool to address issues in water resources management.</description><subject>climate variability</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>hydrologic cycle</subject><subject>Hydrology</subject><subject>Hydrology. 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Rocky ; Lightsey, Trey</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-i279t-59c549d8a438c6392f52c34e464128fde8eb9a3c26b0880a95f62f27d65e1da13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2002</creationdate><topic>climate variability</topic><topic>Earth sciences</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>hydrologic cycle</topic><topic>Hydrology</topic><topic>Hydrology. Hydrogeology</topic><topic>PnET-II model</topic><topic>PnET-II3SL model</topic><topic>runoff</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Liang, Yiguo</creatorcontrib><creatorcontrib>Durrans, S. 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Rocky</au><au>Lightsey, Trey</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A REVISED VERSION OF PnET-II TO SIMULATE THE HYDROLOGIC CYCLE IN SOUTHEASTERN FORESTED AREAS</atitle><jtitle>Journal of the American Water Resources Association</jtitle><date>2002-02-01</date><risdate>2002</risdate><volume>38</volume><issue>1</issue><spage>79</spage><epage>89</epage><pages>79-89</pages><issn>1093-474X</issn><eissn>1752-1688</eissn><coden>JWRAF5</coden><abstract>The PnET-II model uses hydroclimatic data on maximum and minimum temperatures, precipitation, and solar radiation, together with vegetation and soil parameters, to produce estimates of net primary productivity, evapotranspiration (ET), and runoff on a monthly time step for forested areas. In this study, the PnET-II model was employed to simulate the hydrologic cycle for 17 Southeastern eight-digit hydrologic unit code (HUC) watersheds dominated by evergreen or deciduous tree species. Based on these control experiments, model biases were quantified and tentative revision schemes were introduced. Revisions included: (1) replacing the original single soil layer with three soil layers in the water balance routine; (2) introducing calibrating factors to rectify the phenomenon of overestimation of ET in spring and early summer months; (3) parameterizing proper values of growing degree days for trees located in different climate zones; and (4) adjusting the parameter of fast-flow (overland flow) fraction based on antecedent moisture condition and precipitation intensity. The revised PnET-II model, called PnET-II3SL in this work, substantially improved runoff simulations for the 17 selected experimental sites, and therefore may offer a more powerful tool to address issues in water resources management.</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1111/j.1752-1688.2002.tb01536.x</doi><tpages>11</tpages></addata></record> |
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subjects | climate variability Earth sciences Earth, ocean, space Exact sciences and technology hydrologic cycle Hydrology Hydrology. Hydrogeology PnET-II model PnET-II3SL model runoff |
title | A REVISED VERSION OF PnET-II TO SIMULATE THE HYDROLOGIC CYCLE IN SOUTHEASTERN FORESTED AREAS |
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