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U.S. GEOLOGICAL SURVEY
Data Series 412

Estimated Perennial Streams of Idaho and Related Geospatial Datasets

Prepared in cooperation with the Idaho Department of Environmental Quality and the Bureau of Reclamation

By Alan Rea and Kenneth D. Skinner

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Figures

Figure 1. Spatial distribution of perennial streams and subbasins from National Hydrography Dataset High-Resolution, and 7.5-minute quadrangle boundaries in northern Idaho.

Figure 2. Location of study area, streamflow-gaging stations, and eight regions used to estimate low-flow frequency statistics for unregulated streams in Idaho.

Figure 3. Stream locations determined by differences in drainage between the NHD and flow paths of a NED-derived stream, resultant NHD catchment delineations using unmodified NED digital elevation model (DEM) data, and resultant NHD catchment delineations using the HydroDEM.

Figure 4. Schematic diagram of AGREE process in a Digital Elevation Model cross section.

Figure 5. Screen captures showing shaded-relief view of Elevation Derivatives for National Applications (EDNA) data near Arrowrock Dam, and shaded-relief view of modified HydroDEM with burning of NHD streams near Arrowrock Dam, in Idaho.

Figure 6. Screen captures showing shaded-relief view of Elevation Derivatives for National Applications (EDNA) data in an area of placer mining, and shaded-relief view of modified HydroDEM with burning of NHD streams in an area of placer mining in Idaho.

Figure 7. Screen captures showing view of Elevation Derivatives for National Applications (EDNA) data in a relatively flat, valley location, and view of modified HydroDEM with burning of NHD streams in a relatively flat, valley location in Idaho.

Figure 8. Spatial distribution of modeled perennial streams and subbasins in northern Idaho.

Tables

Table 1. Regression equations for the 7Q₂ low-flow statistic for unregulated streams in regions 1–8 in Idaho.

Table 2. Example instructions for deleting data components from geospatial datasets.

Table 3. ArcHydro datasets tiled by 8-digit Hydrologic Unit Code.

Table 4. Selected data elements stored in the ArcHydro global geodatabase for Idaho.

This report is available online in Portable Document Format (PDF). If you do not have the Adobe Reader, it is available for free download from Adobe Systems Incorporated.

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Download the appendixes (PDF, 96 KB)

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Send questions or comments about this report to the author, A.H. Rea, (208) 387-1323.

For more information about USGS activities in Idaho, visit the USGS Idaho Water Science Center home page.