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:A GSSHA model is needed before soil data can be added. !style="text-align:left;"|2. Add soil data.

...numbers. For a [[WMS:Land Use|land use]] or [[WMS:Soil Type Coverage|soil type coverage]], the mapping table may be set up interactively by selecting each ...le is a mapping table containing composite curve numbers (CN), which are a type of lumped parameter. Land use tables with corresponding CNs vary from text

...ure is commonly used to join a separate table of soil attributes to a soil type shapefile in order to compute composite Curve Numbers.

...s in the United States. Information covered includes soil characteristics, soil properties, and addresses limits, risks, and suitability for various uses. ...=https://websoilsurvey.sc.egov.usda.gov/App/WebSoilSurvey.aspx |title= Web Soil Survey |accessdate=May 1, 2019 |publisher=USDA Natural Resource Conservatio

...Dialog GSSHA Overland Soil Erosion.png|thumb|right|500 px|GSSHA ''Overland soil erosion'' dialog.]] ...on'' dialog allows sediments to be defined. It is accessed by turning on ''Soil erosion'' in the other options section of the [[WMS:GSSHA Job Control|''GSS

; Computing Orange County Losses : Soil type and land use data are required in order to compute Orange County losses (Fm # [[WMS:Importing Shapefiles|Import shapefiles]] with soil type and land use data

...to be imported into WMS. Digital maps of rainfall depth (isohyetal maps), soil types, land use (percent impervious), and DPA zones are all available from ===Computation Type===

...ns/gis_data/huc/ this location]. "Ssurgo" data can be downloaded from the soil data mart [http://soildatamart.nrcs.usda.gov/ here]. # If needed, convert the coordinates of the soil data to State plane coordinates as described for DEMs above.

.... Many, if not all, of these losses are affected by the land cover or soil type. ...ethod#OC_Rational_Equation|peak flow rate]]. This value corresponds to the soil group, cover complex, and imperviousness of the drainage subarea. ''Fm'' is

* [[WMS:Soil Type|Soil Type]]

#SCS (NRCS) Curve Numbers for hydrologic soil groups (requires the use of a soil coverage as well). #Soil type A CN, soil type B CN, soil type C CN, and soil type D CN.

...her number indicates a higher likelihood of the contaminant adsorbing onto soil particles. ...distribution coverage type in WMS. Simply create either a land use or soil type coverage and create polygons representing the different contaminant plumes.

Most of the files used by WMS have a card type format. With this format, the different components of the file are grouped * [[WMS:Soil Type Runoff Coefficient Files|Soil Type Runoff Coefficient Files]]

*Soil IDs are supplied from a soil type coverage in the map module or as DEM (a gridded) attributes. *A user defined table relating soil IDs to the parameters being mapped (for example runoff coefficients, Green

; Soil File : The file containing soil type information for MODRAT should be entered in this field. This is generally t ...copy the standard L.A. County Soil file (LASOILX.DAT), then add additional soil numbers and data to the end of it, beginning with number 373.

:[[WMS:Soil Type Runoff Coefficient Files|Soil Type Runoff Coefficient Files]]

...file with a minimal set of attributes. The hydrologic soil group and other soil classifications are stored in a separate DBF file. The two files are relate ...w where we are only interested in adding the field representing hydrologic soil groups.

...to define [[WMS:Land Use Coverage|land use]] and [[WMS:Soil Type Coverage|soil zones]]. Land use and soil zones can be used to compute curve numbers or map other important modeling

:*Soil Type

...ainage boundaries and another coverage could be used to define land use or soil zones. These objects could not be included in a single coverage since polyg ...og. The ''coverage properties'' dialog allows specifying what the coverage type is, its default elevation (mostly used for displaying and overlaying) and c