{
    "tag": 17630,
    "title": "Multibeam backscatter data collected within Lake Powell, UT-AZ during USGS Field Activity 2017-049-FA, using a dual-head Reson T20-P multibeam echosounder (8-bit GeoTIFF, UTM Zone 12N, WGS 84, 2 meter resolution)",
    "pubdate": "2018",
    "sername": null,
    "series_name": null,
    "issue": "DOI:10.5066\/P90BU2VS",
    "publish": null,
    "publisher_name": null,
    "onlink": "https:\/\/cmgds.marine.usgs.gov\/catalog\/whcmsc\/SB_data_release\/DR_P90BU2VS\/2017-049-FA_T20P_Backscatter_2m.meta.faq.html",
    "format": null,
    "email": null,
    "descript": "High-resolution geophysical mapping of Lake Powell in the Glen Canyon National Recreation Area in Utah and Arizona was conducted between October 8 and November 15, 2017, as part of a collaborative effort between the U.S. Geological Survey and the Bureau of Reclamation to provide high-quality data needed to reassess the area-capacity tables for the Lake Powell reservoir. Seismic data collected during this survey can help to define the rates of deposition within the San Juan and Colorado Rivers, which are the main inflows to Lake Powell. These new data are intended to improve water budget management decisions that affect the natural and recreational resources of the reservoir. Multibeam echosounder bathymetry and backscatter data were collected along 2,312 kilometers of tracklines (331 square kilometers) of the lake floor to regionally define its depth and morphology, as well as the character and distribution of lake-floor sediments. Ninety-two kilometers of seismic-reflection profile data were also collected to define the thickness and structure of sediment deposits near the confluences of the San Juan and Colorado Rivers.",
    "lang": null,
    "journal": null,
    "pwid": null,
    "originator": [
        {
            "name": "U.S. Geological Survey",
            "role": "Author"
        },
        {
            "name": "Andrews, Brian D.",
            "role": "Author"
        },
        {
            "name": "Baldwin, Wayne E.",
            "role": "Author"
        },
        {
            "name": "Worley, Charles R.",
            "role": "Author"
        },
        {
            "name": "Baskin, Robert L.",
            "role": "Author"
        },
        {
            "name": "Denny, Jane F.",
            "role": "Author"
        },
        {
            "name": "Foster, David S.",
            "role": "Author"
        },
        {
            "name": "Irwin, Barry J.",
            "role": "Author"
        },
        {
            "name": "Moore, Eric M.",
            "role": "Author"
        },
        {
            "name": "Nichols, Alexander R.",
            "role": "Author"
        }
    ],
    "index_term": [
        {
            "thcode": 2,
            "code": "464",
            "name": "geology",
            "scope": "Study of the planet earth, its composition, structure, physical and chemical processes, and history since its origin."
        },
        {
            "thcode": 2,
            "code": "470",
            "name": "geophysics",
            "scope": "Branch of geology studying the physical characteristics and phenomena of the earth and its atmosphere."
        },
        {
            "thcode": 2,
            "code": "474",
            "name": "geospatial datasets",
            "scope": "Collections of related digital information that are geographically referenced."
        },
        {
            "thcode": 2,
            "code": "2091",
            "name": "lakebed acoustic reflectivity",
            "scope": "Acoustic energy received by a sonar system, providing a measure of the roughness of the lakebed."
        },
        {
            "thcode": 2,
            "code": "2090",
            "name": "lakebed characteristics",
            "scope": "Characteristics of the bottom of inland bodies of water."
        },
        {
            "thcode": 2,
            "code": "2036",
            "name": "multibeam sonar",
            "scope": "Acoustic technique for determining depths or creating backscatter imagery in a wide swath of seafloor or lakebed centered below the instrument platform."
        },
        {
            "thcode": 15,
            "code": "008",
            "name": "geoscientificInformation",
            "scope": "Information pertaining to earth sciences, for example geophysical features and processes, geology, minerals, sciences dealing with the composition, structure and origin of the earth's rocks, risks of earthquakes, volcanic activity, landslides, gravity information, soils, permafrost, hydrogeology, groundwater, erosion"
        },
        {
            "thcode": 15,
            "code": "010",
            "name": "imageryBaseMapsEarthCover",
            "scope": "Base maps, for example land\/earth cover, topographic maps, imagery, unclassified images, annotations, digital ortho imagery"
        },
        {
            "thcode": 15,
            "code": "012",
            "name": "inlandWaters",
            "scope": "Inland water features, drainage systems and characteristics, for example rivers and glaciers, salt lakes, water utilization plans, dams, currents, floods and flood hazards, water quality, hydrographic charts, watersheds, wetlands, hydrography"
        }
    ],
    "place_term": [],
    "image": [
        {
            "name": "https:\/\/www.sciencebase.gov\/catalog\/file\/get\/5ba3cc6de4b08583a5c81bbf\/?name=2017-049-FA_T20P_Backscatter_2m_browse.jpg",
            "description": "Thumbnail image of 2-m multibeam echosounder backscatter data collected within Lake Powell, UT-AZ."
        }
    ],
    "fan": [
        "2017-049-FA"
    ]
}