WMS:Texas Department of Transportation

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WMS Modeling Tips for Texas Department of Transportation

NSS

The TXDOT Regression Equation for watersheds in rural areas is listed in the NSS program as "Peak Rural Statewide 2009 5087". The equation requires the following parameters:

  1. Drainage Area: Computed by WMS
  2. Main Channel Slope: Computed by WMS, currently needs to be transferred manually from basin data parameters to NSS window.
  3. Mean Annual Precipitation: Derived from a map located at the [TNRIS http://tg-twdb-gemss.s3.amazonaws.com/d/hydro/tx_precip.zip] website. You can also download the shapefiles directly from [here http://tg-twdb-gemss.s3.amazonaws.com/d/hydro/tx_precip.zip]
  4. OmegaEM residual from 2009 5087: Derived from a map located in [this http://pubs.usgs.gov/sir/2009/5087/pdf/sir2009-5087.pdf] report
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