{
    "tag": 17705,
    "title": "Nearshore groundwater seepage and geochemical data measured in 2015 at Guinea Creek, Rehoboth Bay, Delaware",
    "pubdate": "20210608",
    "sername": null,
    "series_name": null,
    "issue": "DOI:10.5066\/P94NBY3Z",
    "publish": null,
    "publisher_name": null,
    "onlink": "https:\/\/cmgds.marine.usgs.gov\/catalog\/whcmsc\/SB_data_release\/DR_P94NBY3Z\/Metadata_GuineaCreek.faq.html",
    "format": null,
    "email": null,
    "descript": "Assessment of biogeochemical processes and transformations at the aquifer-estuary interface and measurement of the chemical flux from submarine groundwater discharge (SGD) zones to coastal water bodies are critical for evaluating ecosystem service, geochemical budgets, and eutrophication status. The U.S. Geological Survey and the University of Delaware measured rates of SGD and concentrations of dissolved constituents, including nitrogen species, from recirculating ultrasonic and manual seepage meters, and in nearshore groundwater, on the southern shore of Guinea Creek, an estuarine tributary of Rehoboth Bay, in Millsboro, Delaware, in June, August, and October of 2015. A novel oxygen- and light-regulated seepage meter and a standard seepage meter were deployed as an adjacent pair and sampled at 0.5- to 2-hour intervals across the majority or entirety of single tidal cycles (8 to 12 hours). SGD rate was measured within an attached collection bag (0.5- to 2-hour intervals), or with an ultrasonic flow sensor (1-second intervals). Groundwater samples were collected at multiple depths (5 to 83 centimeters) in shore-perpendicular transects extending across the nearshore subtidal SGD zone. Constituents and other parameters measured in seepage meters and groundwater included: dissolved oxygen, salinity, pH, oxidation\/reduction potential, temperature, nitrate, ammonium, phosphate, dissolved organic and inorganic carbon, stable isotopic ratios of carbon species, trace elements, and alkalinity. These data can be used to evaluate biogeochemical conditions and extent of chemical transformation in the upper coastal aquifer and surface sediments and to calculate fluxes of nitrogen and other constituents carried by SGD across the aquifer-estuary interface.",
    "lang": null,
    "journal": null,
    "pwid": null,
    "originator": [
        {
            "name": "Brooks, T. Wallace",
            "role": "Author"
        },
        {
            "name": "Kroeger, Kevin D.",
            "role": "Author"
        },
        {
            "name": "Michael, Holly A.",
            "role": "Author"
        },
        {
            "name": "Szymczycha, Beata",
            "role": "Author"
        },
        {
            "name": "Eagle, Meagan J.",
            "role": "Author"
        },
        {
            "name": "York, Joanna K.",
            "role": "Author"
        }
    ],
    "index_term": [
        {
            "thcode": 2,
            "code": "93",
            "name": "biogeochemical cycling",
            "scope": "The cycling of chemical constituents through a biological system."
        },
        {
            "thcode": 2,
            "code": "437",
            "name": "geochemistry",
            "scope": "Study of the distribution of chemical elements and natural compounds on the earth and in the atmosphere and the chemical processes that affect the earth."
        },
        {
            "thcode": 2,
            "code": "1010",
            "name": "salinity",
            "scope": "Measure of the concentration of salts dissolved in a solution."
        },
        {
            "thcode": 2,
            "code": "1298",
            "name": "water chemistry",
            "scope": "Branch of chemistry that deals with the elements and compounds in water."
        },
        {
            "thcode": 2,
            "code": "1306",
            "name": "water quality",
            "scope": "The chemical, physical, and biological characteristics of water, usually in respect to its suitability for a particular purpose."
        },
        {
            "thcode": 15,
            "code": "007",
            "name": "environment",
            "scope": "Environmental resources, protection and conservation, for example environmental pollution, waste storage and treatment, environmental impact assessment, monitoring environmental risk, nature reserves, landscape, water quality, air quality, environmental modeling"
        },
        {
            "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"
        }
    ],
    "place_term": [],
    "image": [
        {
            "name": "https:\/\/www.sciencebase.gov\/catalog\/file\/get\/5fec8c1ed34ea5387defd59d?name=Thumbnail_Image_GuineaCreek.jpg",
            "description": "Schematic of the sampling scheme adapted from Brooks and others (2021)."
        }
    ],
    "fan": [
        "2015-056-FA"
    ]
}