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  • Digital elevation models (DEMs) of the Elwha River delta, Washington, September 2014

    Metadata Updated: March 22, 2021

    This part of the data release presents a digital elevation model (DEM) derived from bathymetry and topography data of the Elwha River delta collected in September 2014. Two dams on the Elwha River, Washington State, USA trapped over 20 million m3 of sediment, reducing downstream sediment fluxes and contributing to erosion of the river's coastal delta. The removal of the Elwha and Glines Canyon dams between 2011 and 2014 induced massive increases in river sediment supply and provided an unprecedented opportunity to examine the response of a delta system to changes in sediment supply. The U.S. Geological Survey developed an integrated research program aimed at understanding the ecosystem responses following dam removal that included regular monitoring of coastal and nearshore bathymetry and topography. As part of this monitoring program, the USGS conducted a bathymetric and topographic survey in the Strait of Juan de Fuca on the Elwha River delta, Washington (USGS Field Activity Number 2014-649-FA). Bathymetry data were collected using two personal watercraft (PWCs), each equipped with single-beam echosounders and survey-grade global navigation satellite systems (GNSS). Topography data were collected on foot with GNSS receivers mounted on backpacks. DEM surfaces were produced from all available elevation data using linear interpolation.

    Access & Use Information

    License: No license information was provided.

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    Dates

    Metadata Date October 19, 2020
    Metadata Created Date March 22, 2021
    Metadata Updated Date March 22, 2021
    Reference Date(s) January 1, 2016 (publication)
    Frequency Of Update notPlanned

    Metadata Source

    Harvested from USGS-Harvest

    Graphic Preview

    image map showing 5-m resolution digital elevation model (DEM) of Elwha River delta, color-coded to show elevation

    Additional Metadata

    Resource Type Dataset
    Metadata Date October 19, 2020
    Metadata Created Date March 22, 2021
    Metadata Updated Date March 22, 2021
    Reference Date(s) January 1, 2016 (publication)
    Responsible Party U.S. Geological Survey, Pacific Coastal and Marine Science Center (Point of Contact)
    Contact Email
    Guid
    Access Constraints Use Constraints: USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator(s) of the dataset and in products derived from these data. This information is not intended for navigational purposes., Access Constraints: none
    Bbox East Long -123.521769
    Bbox North Lat 48.159528
    Bbox South Lat 48.137144
    Bbox West Long -123.587543
    Coupled Resource
    Frequency Of Update notPlanned
    Graphic Preview Description image map showing 5-m resolution digital elevation model (DEM) of Elwha River delta, color-coded to show elevation
    Graphic Preview File https://www.sciencebase.gov/catalog/file/get/583e217ae4b0f0dc05ea548b?name=ew14_sept_dem_5m.png&allowOpen=true
    Graphic Preview Type PNG
    Licence Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.
    Metadata Language eng; USA
    Metadata Type geospatial
    Progress completed
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 2014-09-05
    Temporal Extent End 2014-09-08

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