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Folders: ROOT > ScienceBase Catalog > Pacific Coastal and Marine Science Center > Eelgrass distributions and bathymetry of the Nisqually River delta, Washington > Eelgrass distributions and bathymetry of the Nisqually River delta, Washington, 2012 ( Show all descendants )

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___Eelgrass distributions and bathymetry of the Nisqually River delta, Washington
____Eelgrass distributions and bathymetry of the Nisqually River delta, Washington, 2012
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This portion of the USGS data release presents eelgrass distribution and bathymetry data derived from acoustic surveys of the Nisqually River delta, Washington in 2012 (USGS Field Activity Number D-01-12-PS). Eelgrass and bathymetry data were collected from the R/V George Davidson equipped with a single-beam sonar system and global navigation satellite system (GNSS) receiver. The sonar system consisted of a Biosonics DT-X single-beam echosounder and 420 kHz transducer with a 6-degree beam angle. Depths from the echosounder were computed using sound velocity assuming a salinity of 30 psu and temperature of 10 degrees Celcius. Positioning of the survey vessel was determined at 5 to 10 Hz using a Trimble R7 GNSS receiver...
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This portion of the USGS data release presents eelgrass distributions derived from towed underwater video surveys of the Nisqually River delta, Washington in 2012 (USGS Field Activity Number D-01-12-PS). Eelgrass data were collected from the R/V George Davidson equipped with a towed underwater video system and global navigation satellite system (GNSS) receiver. The underwater video system consisted of a Splashcam standard definition video camera connected to a Sony GV-D1000 video monitor and tape recorder. Positioning of the survey vessel was determined at 1 Hz intervals using a Trimble R7 GNSS receiver and Trimble Zephyr Model 2 antenna. The positioning data from the GNSS were encoded onto the audio track of the...
    map background search result map search result map Eelgrass distributions and bathymetry derived from an acoustic survey of the Nisqually River delta, Washington, 2012 Eelgrass distributions derived from a towed underwater video survey of the Nisqually River delta, 2012 Eelgrass distributions derived from a towed underwater video survey of the Nisqually River delta, 2012 Eelgrass distributions and bathymetry derived from an acoustic survey of the Nisqually River delta, Washington, 2012