WMS:Louisiana DOTD Models Using the USGS Method

USGS Project

1. Using the WMS Wizard set the project coordinate system to UTM, NAD83, Zone 15
2. With the Microsoft Virtual Earth Utility identify your study area – make sure it is "bigger" than the study area
3. With Web Services download the DEM (1 arc Second recommended for larger areas) and Topo map (aerial photograph too if you want)
   1. If there are problems with the topo map you can go to http://msrmaps.com/ or to http://atlas.lsu.edu/ and navigate to download the DRG Files
   2. For the DEM you can go to http://seamless.usgs.gov/
   3. You shouldn’t need the Land Use and Soils files for these projects because they do not require you to compute CN, but if you want to run HMS or something else then you can refer to the SCS document to process the land use and soils files
4. Delineate the watershed
   1. Before delineating turn on the Create TC Coverage option
   2. Set the Accumulation Threshold to 1-3 sq. miles
5. Clean up the model
   1. Turn off the Model Checker if you want
6. Exit the wizard and identify the data necessary to run your model.
7. Use the Maximum Flow Slope *5280 to get feet/mile
8. Save your WMS Project.
9. Open the MeanRainfall.jpg or MeanRainfallUpdated.jpg file and determine the Mean Annual Rainfall.
10. Run your model with the standard LADOTD program.
    1. http://www.dotd.louisiana.gov/highways/road_design/hydr/