TR-20 (Technical Report-20)

TR-20 is a conceptual, lumped-parameter, event model that uses hourly data and is applicable for rural watersheds of up to ten square miles.

conceptuallumped-parameterevent modelrural watersheds

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Initial contribute: 2020-01-08

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USDA
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Detailed Description

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Quoted from: Demissie, Misganaw, Abiola A. Akanbi, and Abdul Khan. Hydrologic Modeling of Landscape Functions of Wetlands. Illinois State Water Survey, Champaign, Research Report 125, 1997. https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.534.3382&rep=rep1&type=pdf 

      The Soil Conservation Service or SCS (1973) of the USDA in Maryland developed the Technical Report-20 (TR20) model. This conceptual, lumped-parameter, event model uses hourly data and is applicable for rural watersheds of up to ten square miles. It uses soil and land-use characteristics to generate the storm hydrograph due to precipitation input. The general structure of the TR-20 model is presented in figure 5. This model ignores interception and evapotranspiration. Infiltration is not modeled explicitly; rather, the SCS curve number method is used to compute excess rainfall. Overland flow is modeled on the basis of the SCS synthetic unit hydrograph method. Channel routing is performed by the CONVEX method, which is essentially a single-parameter Muskingum method (McCarthy, 1938). Ground-water flow is not simulated in this model.

Figure 5. General structure of the TR-20 model (after Soil Conservation Service, 1973)  

模型元数据

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TR-20 team (2020). TR-20 (Technical Report-20), Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/d5fe8e34-b263-4e6e-97de-d676683143a7
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Contributor(s)

Initial contribute : 2020-01-08

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Authorship

:  
USDA
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