{
    "tag": 19366,
    "title": "In situ sediment profile images from south San Francisco Bay, California, 2023-2025",
    "pubdate": "20250820",
    "sername": null,
    "series_name": null,
    "issue": "DOI:10.5066\/10.5066\/P14D723N",
    "publish": null,
    "publisher_name": null,
    "onlink": "https:\/\/cmgds.marine.usgs.gov\/catalog\/pcmsc\/DataReleases\/CMGDS_DR_tool\/DR_P14D723N\/DMP23_sediment_profile_images_metadata.faq.html",
    "format": null,
    "email": null,
    "descript": "In situ images of the sediment-water interface and sediment profiles were collected to characterize the top layer of the sediment bed (less than 15 cm sediment depth) prior to dredged material placement and post dredge material placement in south San Francisco Bay, California. Several sites within the placement area, as well as sites outside of the placement area, and near time-series stations were collected. The photos were acquired during four separate trips: August 2023 (pre-placement), October 2023 (pre-placement), January 2023 (post-placement), and February (greater than 1 year post-placement). The sediment profile imaging system consisted of a Blackfly S Board-level BFS-GE-50S5C0BD2 camera that incorporates a Sony IMX264 sensor and has an m12-mount type wide-angle 4.4 mm lens. The resulting field of view was approximately 7x15 cm at the window, with a resolution of 0.0667 mm per pixel when the vertically (portrait) oriented window of the housing was pushed into the sediment bed. The camera was secured horizontally in Sediment Profile Imaging (SPI) camera waterproof housing from OceanInstruments, which was lowered to the bay floor at the different stations and pushed from above into the sediment bed using a rigidly attached pole. The images captured using the system show a profile view which includes a surface view of the sediment bed where the window was above the water-sediment interface, and\/or a high-resolution sediment profile where the window extended vertically down into the sediment bed and was flush with the sediment. The maximum depth below the water-sediment interface recorded by the sediment profile imaging camera was approximately 15 cm.",
    "lang": null,
    "journal": null,
    "pwid": null,
    "originator": [
        {
            "name": "McGill, Samantha C.",
            "role": "Author"
        },
        {
            "name": "Hatcher, Gerald A.",
            "role": "Author"
        },
        {
            "name": "Lacy, Jessica R.",
            "role": "Author"
        },
        {
            "name": "Stevens, Andrew W.",
            "role": "Author"
        },
        {
            "name": "Allen, Rachel M.",
            "role": "Author"
        },
        {
            "name": "Dartnell, Peter",
            "role": "Author"
        },
        {
            "name": "Thede, Joanne C.",
            "role": "Author"
        },
        {
            "name": "Tan, Angela C.",
            "role": "Author"
        }
    ],
    "index_term": [
        {
            "thcode": 2,
            "code": "575",
            "name": "image collections",
            "scope": "Visible representations of objects or earth properties produced by cameras, spectral instruments, or as graphical representations of measurements."
        },
        {
            "thcode": 2,
            "code": "706",
            "name": "marine geology",
            "scope": "Branch of geology concerned with the composition, geologic history, and earth processes of the ocean floor and the continental margin."
        },
        {
            "thcode": 2,
            "code": "1025",
            "name": "sea-floor characteristics",
            "scope": "Geomorphic features and geographic, compositional, and textural variation in the materials composing the ocean floor. Includes both large-scale structures (such as seamounts and rises) and fine-scale variations in rocks and deposits on the sea floor."
        },
        {
            "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": 23,
            "code": "23",
            "name": "Substrate",
            "scope": "Represents the character and composition of the surface and near surface of the sea floor in subtidal or intertidal areas, as defined in the Substrate Component of CMECS or in similar classification systems. Distributions are records of substrate characteristics based on visual or photographic inspection or on analysis of samples and cores, and they also include interpretive maps classifying areas on the basis of combinations of observations, hydrodynamic models, or geological models. Assessments include evaluations of present ecological or economic values of substrate distributions, drivers of substrate change, and functions of substrates. Predictions are the results of models or projections of future substrate distributions, values, or ecological impacts, including predicted substrate changes due to natural and human forces including erosion, accretion, sea-level change, extraction, trawling, or other factors; and they are the results of scenario-based models of substrate changes on ecological or economic values under different management strategies or other human alterations."
        },
        {
            "thcode": 61,
            "code": "476",
            "name": "photographic sampling",
            "scope": "photographic documentation of objects or features such as the sea floor, often collected systematically along a trackline to \"ground truth\" co-located data."
        },
        {
            "thcode": 61,
            "code": "220",
            "name": "sediment",
            "scope": "unconsolidated weathering products that have been eroded, transported, and deposited in another location."
        }
    ],
    "place_term": [],
    "image": [],
    "fan": [
        "2023-655-FA"
    ]
}