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Folders: ROOT > ScienceBase Catalog > USGS Data Release Products > Topographic and bathymetric data on the mainstem Nooksack River, Fall 2015 ( Show all descendants )

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___Topographic and bathymetric data on the mainstem Nooksack River, Fall 2015
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Bathymetric data for the mainstem of the Nooksack River during low flow conditions from 24 to 27 August 2015. Depth data were collected with boat-mounted single-beam echo sounder downstream of Ferndale, Washington and a boat-mounted acoustic doppler current profiler (ADCP) upstream of Ferndale. Elevation of the instruments were determined with real-time kinetic global positioning system (RTK GPS). Irregular XYZ points were interpolated to a continuous grid using kriding methods in stream-wise coordinates and extended to the edge of water through the inclusion of points representing zero-depth locations in the kriging process.
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This DEM combines active channel topography from September 2015 structure from motion surveys, bathymetric data from August 2015 single beam surveys and overbank/floodplain topography from 2013 aerial lidar. A polygon shapefile describing the source of elevation data over the extent of the DEM is also provided.
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Structure from motion photogrammetry was used to contruct a digital elevation model of the Nooksack River based on images acquired on September 15, 2015. Images were acquired using a Ricoh GR II camera mounted in a near-nadir orientation in the wing of a fixed-wing aircraft, flying approximately 1,500' above ground level. Ground control consisted of 53 chalked X's on gravel surfaces, with centriod positions measured using RTK-GNSS. All photo and ground control processing was performed in Agisoft Photoscan
    map background search result map search result map Bathymetric DEM of the lower Nooksack River, August 2015 Topographic survey of the Nooksack River using structure from motion photogrammetry, September 2015 Integrated topographic and bathymetric data of the Nooksack River and floodplain near Everson, WA, data from 2013 and 2015 Integrated topographic and bathymetric data of the Nooksack River and floodplain near Everson, WA, data from 2013 and 2015 Topographic survey of the Nooksack River using structure from motion photogrammetry, September 2015 Bathymetric DEM of the lower Nooksack River, August 2015