Comparing the High Resolution NHDPlus to the Medium Resolution NHDPlus

Authors: Michael Tinker*, USGS
Topics: Cartography, Water Resources and Hydrology
Keywords: US Topo, NHD, NHDPlus
Session Type: Paper
Day: 4/12/2018
Start / End Time: 3:20 PM / 5:00 PM
Room: Grand Ballroom B, Sheraton, 5th Floor
Presentation File: No File Uploaded

Many papers and models have been written about the Medium Resolution NHDPlus (NHDPlus MR). This presentation will introduce the new High Resolution NHDPlus (NHDPlus HR). We will present some of the Value Added Attributes of the NHDPlus HR, including Flow Direction, Flow Rates, Stream Order, Stream Level, Stream Calculator, Hydro Sequence number, and the included elevation and catchment rasters. The second half of the presentation presents statistics comparing the NHDPlus MR to the NHDPlus HR. Proximity of stream confluences and headwaters and total upstream drainage areas for matching ReachCodes in both datasets are considered. The statistics show that the NHDPlus HR compares very well with the NHDPlus MR and is an important dataset for hydrologic modeling and hydrographic mapping.

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