Nevada StreamStats

Currently, StreamStats is available for Nevada on a limited basis. It allows users to select a stream location, delineate the drainage basin for that location, and compute basin characteristics. There is an ongoing study to develop streamflow statistics that is expected to be completed in 2028, and the results will be published in the Nevada StreamStats application and in a U.S. Geological Scientific Investigations Report. 

In 2024, geospatial datasets were developed to be implemented into the StreamStats, enabling accurate watershed delineations. These datasets were compiled from updated National Hydrography Dataset (NHD) flowlines and Watershed Boundary Dataset (WBD) boundaries, and 3D Elevation Program (3DEP).  These datasets are available in the Data Release below: 

• Mayers, C.J., Medina, R.L., Damar, N.A., and Hederman, M.T., 2024. Geospatial Data for Delineating Drainage Basins in the Nevada StreamStats Study Area: U.S. Geological Survey data release, https://doi.org/10.5066/P14RTRWN. 

   

Click on this link to obtain general information on the Nevada application, along with specific sources and computation methods for basin characteristic datasets. These basin characteristics will be tested for potential use as explanatory variables in an ongoing study to develop streamflow statistics. These datasets are available in the Data Release below: 

• Pitman, A.L., Mayers, C.J., and Medina, R.L., 2024, Geospatial Data for Characterizing Drainage Basins in the Nevada StreamStats Study Area: U.S. Geological Survey data release, https://doi.org/10.5066/P19BSSQS. 
   

Notice for drainage area variables used in the National Bankfull Statistics and Maximum Probable Flood scenarios
Base data layers for Nevada StreamStats were processed using sinks so that large areas known to be noncontributing are not included in the adjacent contributing areas to watersheds. For this reason, Nevada StreamStats uses CONTDA (contributing drainage area) as a variable in most regression equations. The national-scale Bankfull Statistics and Maximum Probable Flood scenario regression equations were published using DRNAREA (total drainage area) as a variable. Therefore, DRNAREA was added as a variable in Nevada StreamStats to allow the Bankfull Statistics scenario to compute, but DRNAREA is set equal to the value of CONTDA and actually represents contributing drainage area.