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. 2011 Oct;47(5):916–932. doi: 10.1111/j.1752-1688.2011.00578.x

TABLE 1.

Comparision of the Spatial Resolution of Mapped Features in RF1 and NHDPlus. This table also compares estimates of mean annual flow and catchment size

Geospatial Dataset Number of Catchments With Area Number of Reaches With Mean Annual Flow Estimates Number of Flowlines Mean Catchment Size (km2) Mean Annual Flow (m3/sec) Median Flow (m3/sec−1) Mean Reach Length (km)
RF1 66,147 63,018 64,696 129.7 68.9 2.0 16.0
NHDPlus 2,595,196 2,606,662 2,342,519 3.1 11.1 0.03 2.2

Notes: Mean annual flow for geospatial dataset RF1 represents original estimates. The number of flowlines represents the number of nonshoreline reaches.