Umpqua River, OR (P180) Bathymetric Digital Elevation Model (30 meter resolution) Derived From Source Hydrographic Survey Soundings Collected by NOAA
Bathymetry for the Umpqua River was derived from three surveys containing 10,216 soundings. No surveys were omitted. The average separation between soundings was 48 meters. All the surveys dated from 1971. The total range of soundings was 1.4 meters to - 24.1 meters at mean low water. A mean high water value of 1.6 …