Samantha C. McGill Andrew W. Stevens 20240806 comma-delimited text data release DOI:10.5066/P1XZFGCX Pacific Coastal and Marine Science Center, Santa Cruz, California U.S. Geological Survey https://doi.org/10.5066/P1XZFGCX Samantha C. McGill Jessica R. Lacy Joanne C.T. Ferreira Daniel J. Nowacki Andrew W. Stevens Angela C. Tan 2024 data release DOI:10.5066/P1XZFGCX Pacific Coastal and Marine Science Center, Santa Cruz, CA U.S. Geological Survey Suggested Citation: McGill, S.C., Lacy, J.R., Ferreira, J.C.T., Nowacki, D.J., Stevens, A.W., and Tan, A.C., 2024, Hydrodynamic and sediment transport data from two marshes and adjacent shallows in Northern San Francisco Bay, California 2022-2023: U.S. Geological Survey data release, https://doi.org/10.5066/P1XZFGCX. https://doi.org/10.5066/P1XZFGCX Topographic data were collected in the Corte Madera Marsh, San Pablo National Wildlife Refuge Marsh, and at the time-series stations in the shallows adjacent to each marsh in Northern San Francisco Bay between April 2022 and September 2023. The topographic data were acquired using global satellite navigation system receivers that were either mounted on backpacks and hiked over the marsh surface or mounted on a survey rod held shipside against a deployed platform or on the water surface. Sometimes an additional staff was used in conjunction with the shipside survey rod to reach the platform, which we refer to as an integrated collection method. Topographic data were collected as part of a study to produce information useful for prioritizing marsh restoration sites, assessing restoration actions, and understanding mechanisms of sediment delivery to marshes. These data are intended for researchers, students, policy makers, and the general public. Information about the data collection field activities can be found at: https://cmgds.marine.usgs.gov/fan_info.php?fan=2022-619-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2023-603-FA Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 20220412 20230918 ground condition at time data were collected Complete None planned -122.5056495 -122.472715 38.1186296 37.9285518 USGS Metadata Identifier USGS:d0410af8-8e05-43a1-81bd-7e484344cce4 ISO 19115 Topic Category elevation Data Categories for Marine Planning Bathymetry and Elevation USGS Thesaurus topography GPS measurement Marine Realms Information Bank (MRIB) keywords Global Positioning System (GPS) observations None U.S. Geological Survey USGS Coastal and Marine Hazards and Resources Program CMHRP Pacific Coastal and Marine Science Center PCMSC Geographic Names Information System (GNIS) San Francisco Bay Marin County Sonoma County State of California San Pablo Bay none Corte Madera marsh San Pablo Bay National Wildlife Refuge Corte Madera Bay No access constraints USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator(s) of the dataset and in products derived from these data. U.S. Geological Survey, Pacific Coastal and Marine Science Center PCMSC Science Data Coordinator mailing and physical

2885 Mission Street

Santa Cruz CA 95060 831-427-4747 pcmsc_data@usgs.gov Marsh_topo_pictures.png Images of both Corte Madera Marsh and San Pablo Marsh being surveyed. PNG Paul H. Rydlund Brenda K. Densmore 2012 Rydlund, P.H., Jr., and Densmore, B.K., 2012, Methods of practice and guidelines for using survey-grade global navigation satellite systems (GNSS) to establish vertical datum in the United States Geological Survey: U.S. Geological Survey Techniques and Methods, book 11, chap. D1, 102 p. with appendixes. https://doi.org/10.3133/tm11D1 No formal attribute accuracy tests were conducted. All data falls within expected ranges. Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. Survey-grade positioning for the topographic data were achieved with global navigation satellite system (GNSS) receivers operating in real time kinematic mode with differential corrections from a single GNSS base station placed on a benchmark with established coordinates relative to the North American Datum of 1983 (2011 realization). The position of the GNSS base station was established using two static occupations conforming to level 1 quality as defined by Rydlund and others (2012). Uncertainty in the horizontal positions of the topographic data relative to the GNSS base station were estimated during acquisition using Trimble Access software and provided for each measurement in the dataset. The estimated uncertainty in horizontal positions at the 95 percent confidence interval ranged between 0.001 and 0.114 m with a mean of 0.023 m. Uncertainty in the horizontal positions associated with variable posture of the surveyor during data collection is unknown. Uncertainty in the elevations above the reference ellipsoid of relative to the GNSS base station were estimated during acquisition using Trimble Access software or via post processing using Trimble Business Center software. The estimated uncertainty in vertical positions at the 95 percent confidence interval ranged between 0.015 and 0.089 m with a mean of 0.043 m. Uncertainty in the horizontal positions associated with variable posture of the surveyor during data collection is unknown. Survey grade topographic data were collected with GNSS receivers mounted on either, survey rods, backpacks, or an integrated method which used a survey rod placed above a platform or object whose elevation above bed was known. Prior to data collection, vertical distances between the GNSS antennas and the ground were measured using a tape measure. Hand-held data collectors running Trimble Access were used to log raw data and display navigational information allowing surveyors to follow planned survey lines when appropriate. The positions of the topographic platforms collected in RTK mode were retained, and Trimble Business Center software was used to apply differential corrections to topographic data collected in autonomous mode when VHF communication with the base station failed. Orthometric elevations relative to the NAVD88 vertical datum were computed for all survey platforms, using National Geodetic Survey Geoid18 offsets. Orthometric heights in the North American Vertical Datum 1988 vertical datum were computed using National Geodetic Survey Geoid18 offsets. 20230918 Raw topographic data were imported into Trimble Business Center for inspection. All available data were exported in comma-delimited text format for distribution. 20240515 Samantha C. McGill U.S. Geological Survey, Pacific Coastal and Marine Science Center Oceanographer mailing and physical

2885 Mission St.

Santa Cruz CA 95060 831-460-7543 scmcgill@usgs.gov Point Point 9714 0.0000001 0.0000001 Decimal degrees North American Datum of 1983 GRS_1980 6378137.0 298.257222101 North American Vertical Datum of 1988 0.001 meters Explicit elevation coordinate included with horizontal coordinates Attribute Table Table containing attribute information associated with the dataset Producer defined FAN ID U.S. Geological Survey field activity number (FAN). Producer defined 2022-619-FA Samples collected during USGS field activity 2022-619-FA. Additional information about this field activity can be found at https://cmgds.marine.usgs.gov/fan_info.php?fan=2022-619-FA. Producer defined 2023-603-FA Samples collected during USGS field activity 2023-603-FA. Additional information about this field activity can be found at https://cmgds.marine.usgs.gov/fan_info.php?fan=2023-603-FA. Producer defined datetime_utc The date and time of data collection in Coordinated Universal Time (UTC) Producer Defined 04/12/2022 17:46:04 9/18/2023 17:56:21 date and time in mm/dd/yyyy HH:MM:SS format longitude Longitude coordinate of data point relative to the North American Datum of 1983 Producer Defined -122.5056495 -122.4727150 Decimal degrees latitude Latitude coordinate of data point relative to the North American Datum of 1983 Producer Defined 37.9285518 38.1186296 Decimal degrees easting East coordinate of data point relative to the North American Datum of 1983, projected in the Universal Transverse Mercator(UTM) Zone 10 North, meters, coordinate system Producer Defined 543443.594 4218411.445 meters northing North coordinate of data point relative to the North American Datum of 1983, projected in the Universal Transverse Mercator (UTM) Zone 10 North, meters, coordinate system Producer Defined 543457.924 4219107.584 meters ellipsoid_ht Height in meters of data point with reference to the reference ellipsoid Producer Defined -33.538 -29.093 meters ortho_ht Height in meters of data point with reference to the North American Vertical Datum of 1988 computed using National Geodetic Survey Geoid18 offsets. Producer Defined -1.223 2.928 meters h_precision Precision of the horizontal coordinate (95 percent confidence interval) estimated by the data acquisition software. Producer Defined 0.010 0.114 meters v_precision Precision of the vertical coordinate (95 percent confidence interval) estimated by the data acquisition software. Producer Defined 0.015 0.089 meters feature_code Relevant information regarding the location surveyed, may give the name of the location or transect or a brief descriptor of the observed location. "NA" indicates that no additional information was noted. producer defined text to describe sample location or name of station method Method of sample collection Producer defined backpack Global satellite navigation system receiver was mounted onto backpack. Producer defined survey rod Global satellite navigation system receiver was mounted onto survey rod Producer defined integrated Global satellite navigation system receiver was mounted onto survey rod and used in conjunction with an additional reference object Producer defined The first line of the csv file is a header line U.S. Geological Survey U.S. Geological Survey - CMGDS mailing and physical

2885 Mission St.

Santa Cruz CA 95060 1-888-275-8747 pcmsc_data@usgs.gov Topographic data are available as comma-delimited text files (CorteMadera_Marsh_Topo.csv, SanPablo_Marsh_Topo.csv, and TimeSeriesSites_Topo.csv), along with associated FGDC-compliant metadata. Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. comma-delimited text Trimble Business Center Version 5.60 Comma-separated text files, ranging in size from 5 to 965 KB No compression applied 1.0567 https://doi.org/10.5066/P1XZFGCX Data can be downloaded using the Network_Resource_Name link then scrolling down to the Location-Elevation Data section. None. 20240806 U.S. Geological Survey, Pacific Coastal and Marine Science Center PCMSC Science Data Coordinator mailing and physical

2885 Mission Street

Santa Cruz CA 95060 831-427-4747 pcmsc_data@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998