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Bathymetric change grids covering the periods of time from 1934 to 2011, from 2011 to 2018, and from 1934 to 2018 are presented. The grids cover a portion of the Mokelumne River, California, starting at its terminus at the San Joaquin River and moving upriver to the confluences of the north and south branches of the Mokelumne. Positive grid values indicate accretion, or a shallowing of the surface bathymetric surface, and negative grid values indicate erosion, or a deepening of the bathymetric surface. Bathymetry data sources include the U.S. Geological Survey, California Department of Water Resources, and NOAA's National Ocean Service.
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This data release includes water quality data collected from ponds on Boudin Island in the Sacramento-San Joaquin Delta. Data were collected in the Bouldin East and Bouldin West ponds concurrently with a Delta Smelt Enclosure Study which involved three cages in each pond with approximately 60 Delta Smelt (Hypomesus transpacificus) in each cage. There were two fish deployments, the first deployment was from 11/21/2022 to 01/04/2023 (~6 weeks) and the second was from 02/02/2023 to 05/03/2023 (~13 weeks). Temperature, dissolved oxygen, turbidity, specific conductance, salinity, chlorophyll, and pH were measured weekly. Water temperature was recorded continuously (15-minute sampling interval). Both the discrete (weekly)...
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This data includes information on water quality, zooplankton, and fish sampled in ponds on delta islands in San Joaquin County, California. The islands include Bacon (North and South ponds), Bouldin (East and West ponds), Holland Tract (Middle, North, and South ponds), and Webb Tract (East, Middle, and North ponds). Discrete water quality parameters were measured bimonthly and continuous temperature was recorded every 15 minutes. Zooplankton were sampled monthly using a Schindler-Patalas 12L plankton trap with a 200mL Dolphin bucket with 61 micron stainless mesh. Fish were sampled once at each pond using beach seines, gill nets, and boat electrofishing gear.
    map background search result map search result map USGS 1:24000-scale Quadrangle for Bouldin Island, CA 1997 USGS 1:24000-scale Quadrangle for Bouldin Island, CA 1952 USGS 1:24000-scale Quadrangle for Bouldin Island, CA 1952 USGS 1:24000-scale Quadrangle for Bouldin Island, CA 1952 USGS 1:24000-scale Quadrangle for Bouldin Island, CA 1978 USGS 1:24000-scale Quadrangle for Bouldin Island, CA 1978 USGS 1:24000-scale Quadrangle for Bouldin Island, CA 1952 Bathymetric change analyses of the southernmost portion of the Mokelumne River, California, from 1934 to 2018 Water Quality and Biological Data from Ponds on Islands of the Sacramento-San Joaquin Delta Water Quality Data from Ponds on Bouldin Island in the Sacramento-San Joaquin Delta, California Bathymetric change analyses of the southernmost portion of the Mokelumne River, California, from 1934 to 2018 Water Quality Data from Ponds on Bouldin Island in the Sacramento-San Joaquin Delta, California USGS 1:24000-scale Quadrangle for Bouldin Island, CA 1997 USGS 1:24000-scale Quadrangle for Bouldin Island, CA 1952 USGS 1:24000-scale Quadrangle for Bouldin Island, CA 1952 USGS 1:24000-scale Quadrangle for Bouldin Island, CA 1952 USGS 1:24000-scale Quadrangle for Bouldin Island, CA 1978 USGS 1:24000-scale Quadrangle for Bouldin Island, CA 1978 USGS 1:24000-scale Quadrangle for Bouldin Island, CA 1952 Water Quality and Biological Data from Ponds on Islands of the Sacramento-San Joaquin Delta