California State Waters Map Series—Offshore of Pigeon Point, California
In 2007, the California Ocean Protection Council initiated the California Seafloor Mapping Program (CSMP), designed to create a comprehensive seafloor map of high-resolution bathymetry, marine benthic habitats, and geology within the 3-nautical-mile limit of California’s State Waters. The CSMP approach is to create highly detailed seafloor maps through collection, integration, interpretation, and visualization of swath sonar data, acoustic backscatter, seafloor video, seafloor photography, high-resolution seismic-reflection profiles, and bottom-sediment sampling data. The map products display seafloor morphology and character, identify potential marine benthic habitats, and illustrate both the surficial seafloor geology and shallow subsurface geology.
The effects of dredge material disposal on marine benthic habitats of the Santa Cruz Bight, California,
In March, 2001, the Santa Cruz Small Craft Harbor was permitted to dredge some mixed sand and mud (silt and clay) from the upper harbour onto the surf zone at Twin Lakes Beach. A monitoring program was conducted to determine if any sedimentary changes occurred in nearshore benthic habitats of the Santa Cruz Bight during the experimental dredging period. To map the spatial distribution of benthic habitats at risk, and to determine if sedimentary changes occurred due to harbour dredging, multibeam bathymetry surveys and sediment sample data were collected before, during and after the dredging. These data were analyzed and interpreted into two benthic habitat maps and compared using a new GIS mapping technique to quantify areas of sediment erosion and deposition on the Santa Cruz Bight seafloor. The integration and analyses of the data collected over the monitoring period indicates that the muddy upper harbour sediment did not significantly disturb or change the grainsize characteristics of nearshore marine benthic habitats in the Santa Cruz Bight., Cited By (since 1996):1, Rocks & Cores, ,