Module Runoff
From MohidWiki
Revision as of 17:31, 26 March 2009 by Davidbrito (talk | contribs) (→How To Generate Manning Coefficients)
Contents
Overview
Module Runoff calculates the overland surface runoff over a regular structured grid as function of precipitation, infiltration and terrain slope. In the first case infiltration is calculated by Richards equation and runoff calculated by Manning’s equation.
Main Processes
Other Features
How To Generate Manning Coefficients
Manning coefficients must be provided in runoff data file.
Options:
- Use a constant value
- Define a Manning's grid: One possible option is to associate Manning with land use classes (shape file). In this case can use MOHID GIS going to menu [Tools]->[Shape to Grid Data] and provide: i) the grid (model grid), ii) the land use shape file and iii) the corespondence between land use codes and Manning.
Use Manning inicialization with Module FillMatrix standards in the block:
<BeginOverLandCoefficient> FILE_IN_TIME : NONE INITIALIZATION_METHOD : ASCII_FILE REMAIN_CONSTANT : 1 DEFAULTVALUE : 0.08 FILENAME : ..\..\GeneralData\Runoff\Mannings200m_v2.dat <EndOverLandCoefficient>
