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| To compute the rainfall depth on the sub-basins of the MODRAT model, read in a rainfall depth data layer. The isohyetal maps for LA County have been digitized and stored in ARC/INFO® Grid format by the LACDPW; these files can be found in the /MODRAT/Rain/ folder installed with WMS. Import this data by choosing '''Open''' from the ''File'' menu, then choose ''Rainfall Depth Grid (*.*)'' as the file type. This creates a rainfall grid folder [[File:Map Data Grid folder in Project Explorer.png]] with the Map Data folder in the Project Explorer and can contain multiple rainfall grid objects [[File:Rainfall grid icon.png]].
| | #redirect [[WMS:MODRAT_Edit_Parameters#Rainfall_Depth]] |
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| Alternatively, if there are other rainfall data in vector format (ArcView® Shapefiles, DXF, etc.) import these into WMS. Make sure to create a Rainfall Coverage (see the [[WMS:Coverages|Coverages]] dialog) and map the appropriate database fields when importing this data.
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| Once the rainfall depth data is present in WMS, compute and assign depths using the '''Compute GIS Attributes''' command from the ''Calculators'' menu.
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| ==Related Topics==
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| * [[WMS:MODRAT Edit Parameters#Rainfall Depth|Rainfall]]
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| * [[WMS:Using GIS Data to Map Parameters|Using GIS Data to Map Parameters]]
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| * [[WMS:MODRAT Soil Number|Soil Number]]
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| * [[WMS:MODRAT Percent Impervious Land Use|Percent Impervious Land Use]]
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| [[Category:Needs Update]]
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