Paul Stumpner Trevor Violette 20250506 spreadsheet https://www.sciencebase.gov U.S. Geological Survey https://doi.org/10.5066/P14QSDXY These data along with continuous monitoring at several locations (data provided through NWIS) are used to monitor bottom salinity and tidal currents associated with a project to better monitor X2 (position of 2 PSU [Practical Salinity Units] isohaline) in the lower Sacramento River and Suisun Bay, CA. Links to NWIS sites are provided in the associated web links under 'Related External Resources'. Data included in this data release are 15-minute water column velocity data at discrete bins and 3 locations along the lower Sacramento and Suisun Bay, CA. There are additional figures (.png files) and animations (.avi files) included in this data release, in order to familiarize the user with the content of the data. A publication will be associated with this data release in the future. These data along with continuous monitoring at several locations (data provided through NWIS) are used to monitor bottom salinity and tidal currents associated with a project better monitor X2 (position of 2 PSU [Practical Salinity Units] isohaline) in the lower Sacramento River and Suisun Bay, CA 20210617 20230802 ground condition Complete None planned -121.96609 -121.73126 38.08755 38.03673 ISO 19115 Topic Category inlandWaters None water velocity data USGS Thesaurus acoustic doppler current profiling tidal currents USGS Metadata Identifier USGS:67883440d34e60ddd4de2c0c None Sacramento-San Joaquin Delta, California Common geographic areas Suisun Bay San Joaquin Delta Lower Sacramento California None. Please see 'Distribution Information' for details. None. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. It is requested that the suggested citation for this USGS data release be included in any publications that reference or utilize these data Paul Stumpner USGS - SOUTHWEST REGION Hydrologist mailing and physical

3115 Ramco Street, Suite 180

West Sacramento CA 95691-5873 916-617-2799 pstump@usgs.gov California State Water Resources Control Board Windows 10, Microsoft® Excel® for Microsoft 365 MSO (Version 2408 Build 16.0.17928.20336) 32-bit, year 2024; Matlab R2023a K. Deines 1999 publication Proc. Sixth Working Conf. on Current Measurement, San Diego, CA. IEEE https://doi.org/10.1109/CCM.1999.755249 J. Mullison 2017 publication Proc. ASCE Hydraulic Measurements & Experimental Methods Conference, Durham, NC U.S. Geological Survey 2025 application/service Accessed April 28, 2025. https://doi.org/10.5066/P14QSDXY https://waterdata.usgs.gov/nwis/current?multiple_site_no=380356122023701%2C380337122000301%2C380318121571501%2C11455508%2C11455498%2C11455495%2C11455485&index_pmcode_STATION_NM=1&index_pmcode_DATETIME=2&format=station_list&group_key=NONE&sort_key_2=site_no&html_table_group_key=NONE&rdb_compression=file&list_of_search_criteria=multiple_site_no%2Crealtime_parameter_selection No formal attribute accuracy tests were conducted No formal logical accuracy tests were conducted Data set 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. No formal positional accuracy tests were conducted No formal positional accuracy tests were conducted Data were collected from a RDI Sentinel V20 (1000 kilohertz [kHz]) acoustic Doppler current profiler (ADCPs). The ADCP's were deployed on the bed and oriented to measure water velocity (or currents) from near the bed vertically to near surface. Raw data (.PD0 files) were recorded and stored (in 1-minute intervals) on a Campbell Scientific data logger (CR6). 20250115 Raw binary .PD0 files were converted to machine readable format in Matlab software. Data were checked visually and screened for questionable data that occurred near surface. Data were then averaged to 15-minute intervals. Data were rotated from East-North velocity components to along-stream and cross-stream (X and Y components) based on principle direction of flow recorded by the ADCP. Signal strength (RSSI) was converted to backscatter by accounting for along beam attenuation (Deines, 1999 and Mullison 2017). Data were output into .csv files. 20250115 Universal Transverse Mercator 10 0.9996 -123 0 0 0 coordinate pair 0.1 0.1 meters height above bed 0.3 meters Attribute values *East Velocity.csv - (M X N) matrix of processed East-West (E-W) component of velocity, in m/s - rows (M) align with time stamp and columns (N) align with range (bins) - positive is the velocity component in the East direction - negative is the velocity component in the West direction - values of NaN indicate no data Producer Defined Columns are range (bins) in the vertical; rows are timestamps E-W component of velocity Matrix defined by processing software NaN No Data Producer defined -1.74 1.28 m/s *North Velocity.csv - (M X N) matrix of processed North-South (N-S) component of velocity, in m/s - rows (M) align with time stamp and columns (N) align with range (bins) - positive is the velocity component in the North direction - negative is the velocity component in the South direction - values of NaN indicate no data Producer Defined Columns are range (bins) in the vertical; rows are timestamps N-S component of velocity Matrix defined by processing software NaN No Data Producer defined -0.96 0.66 m/s *Vertical Velocity.csv - (M X N) matrix of processed vertical component of velocity, in m/s - rows (M) align with time stamp and columns (N) align with range (bins) - positive is the velocity component in the up direction - negative is the velocity component in the down direction - values of NaN indicate no data Producer Defined Columns are range (bins) in the vertical; rows are timestamps Vertical component of velocity Matrix defined by processing software NaN No Data Producer defined -0.09 0.13 m/s *Along-Channel Velocity.csv - (M X N) matrix of processed Along-Channel component of velocity, in m/s - rows (M) align with time stamp and columns (N) align with range (bins) - velocity data rotated according to principle flow direction - positive is the velocity component in the downstream direction - negative is the velocity component in the upstream direction - values of NaN indicate no data Producer Defined Columns are range (bins) in the vertical; rows are timestamps Along-Channel component of velocity Matrix defined by processing software NaN No Data Producer defined -1.29 1.78 m/s *Cross-Channel Velocity.csv - (M X N) matrix of processed N-S component of velocity, in m/s - rows (M) align with time stamp and columns (N) align with range (bins) - velocity data rotated according to principle flow direction - positive is the velocity component in the direction from left-right bank - negative is the velocity component in the direction from right-left bank - values of NaN indicate no data Producer Defined Columns are range (bins) in the vertical; rows are timestamps Cross-Channel component of velocity Matrix defined by processing software NaN No Data Producer defined -0.36 0.34 m/s *Backscatter.csv - (M X N) matrix of backscatter data, in decibels - rows (M) align with time stamp and columns (N) align with range (bins) - data is corrected for along beam attenuation, higher values indicate more scatters in the water - values of NaN indicate no data Producer Defined Columns are range (bins) in the vertical; rows are timestamps backscatter data Matrix defined by processing software NaN No Data Producer defined -115.19 -46.62 dB *Timestamp.csv - (M X 1) array of time stamp of data collection, in PST (Pacific Standard Time) Producer Defined Timestamp date and time of measurement in PST Producer Defined 6/17/2021 08:00 8/2/2023 15:45 date and time 15 *Water Surface.csv - (M X 1) array of water surface at each time stamp, based on pressure sensor in ADCP, in meters Producer Defined Water surface location of water surface relative to ADCP Producer Defined NaN no data Producer defined 6.9 13.4 meters *Ranges.csv - (1 X N) array of range (bins) from instrument, in meters Producer Defined Ranges 1 row of data representing measurement distance relative to ADCP Producer Defined 0.83 15.54 meters *Principle Flow Directions_USGS2025_PRS.png Plot that shows principle flow directions for each site, this information was used to rotate velocity from earth coordinates (east-west and north-south) to along-channel and cross-channel components Producer Defined *Velocity Contour Example_USGS2025_PRS.png These plots are intended to familiarize the user with these data and provide and example of the spatial and temporal variation (on fortnightly time scales). Producer Defined There are 9 .csv files for each site. All files are contained in a the zipped folder - Suisun Bay UL ADCP Data.zip. The name of each file contains the location and data type. For instance 'CM 24 Along-channel velocity' contains along-channel velocity data at site CM 24. Columns are denoted by M, and rows denoted by N. The 'time stamp' files have 1 column of data (M x 1) that has the time in PST (Pacific Standard Time) for each site, the 'ranges' files have 1 row of data (1 x N) for each increment along the water column data was collected. The 'water surface' files have 1 column of data (M x 1) indicating the distance (from the ADCP to the water surface. The velocity and backscatter files have a data matrix (M x N), columns align with the ranges and rows align with the time stamps. There is also a meta Data.txt file with the same information, but in a easier format to read. Stumpner P.R., and Violette T.A., 2025, Up-looking acoustic Doppler current profiler data from Suisun Bay and lower Sacramento River, CA from June 2021 - August 2023: U.S. Geological Survey data release, https://doi.org/10.5066/P14QSDXY. U.S. Geological Survey - ScienceBase mailing address

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Denver CO 80225 United States 1-888-275-8747 sciencebase@usgs.gov 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 for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. Digital Data https://doi.org/10.5066/P14QSDXY None 20250506 Paul Stumpner USGS - SOUTHWEST REGION Hydrologist mailing and physical

3115 Ramco Street, Suite 180

West Sacramento CA 95691-5873 916-617-2799 pstump@usgs.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998