Ephemeral stream water contributions to United States drainage networks

<p>Results from our CONUS ephemeral stream modeling study. Included in this release is a set of csv files for each CONUS drainage basin (USGS HUC level 4 basins). These lookup tables can be joined to NHD-HR hydrography (https://www.usgs.gov/national-hydrography/nhdplus-high-resolution). CSV columns are as follows:</p> <ul> <li>NHDPlusID: NHD-HR reach ID. Use this to join to hydrography shapefiles.</li> <li>perenniality: Result of our ephemeral classification model (see paper for methods).</li> <li>percQEph_reach: Main model result. See equation S1 in paper.</li> </ul> <p>&nbsp;</p> <p>Some notes:</p> <ul> <li>Note that continental-scale models prioritize capturing broad patterns across large domains, so we caution against over-interpreting results for individual river reaches.</li> <li>Great Lakes are not included, though the model does route through the lakes for topological consistency.</li> <li>Foreign streams are recast as 'non-ephemeral' to be copacetic with figures in the paper. See paper for more details.</li> <li>Some reaches present in the NHD-HR are not included in our results for a variety of reasons. See paper for details.</li> </ul> <p>&nbsp;</p>