Rainfall-runoff model

This is a hydrological model that converts rainfall precipitat   ion inputs, usually in the form of a hyetograph, into runoff or streamflow values. Such models are usually in two parts – a loss model, followed by a routing model. Rainfall-runoff models are usually implemented as calculations within computer packages.

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Much of the rainfall is evaporated and absorbed as soil water or groundwater, and the remainder becomes runoff. In urban areas, most of the rainfall runs off impervious areas, while infiltration occurs on pervious areas.

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• Loss model

  In rainfall-runoff modelling, loss models are methods or procedures that determine the 'losses' from rainfall that do not contribute to runoff. They are abstractions from the rainfall, producing rainfall excess, equal to rainfall minus losses. The ...

• Event model

  The rainfall-runoff models in DRAINS simulate particular storm events, rather than extended and continuous time series of rainfalls and runoffs that might contain many events. With an event model it is necessary to specify antecedent conditions, ...

• Hydrological model dialog box

  From this window you can select the hydrological rainfall-runoff model to be used. The current default model selected for Designand Analysis runs is shown in the list box to the left. Clicking the Delete Default Model button deletes the highlighted ...

• Horton (ILSAX) hydrological model

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• Horton (ILSAX) Hydrological Model property sheet

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