Sediment Concentration, Water Velocity, and Suspended Particle Size and Settling Data to Estimate Estuarine Sediment Flux at Dumbarton Bridge, San Francisco Bay, CA from 2018 - 2019

Measurements of suspended sediment concentration, water velocity, suspended-sediment particle size, and suspended-sediment particle settling velocity were collected to estimate suspended-sediment flux and investigate sediment transport processes at Dumbarton Bridge in San Francisco Bay (NWIS station 373015122071000) from calendar year 2018 to 2019. Data were collected using: stationary and boat-mounted acoustic Doppler current meters (ADCP, a 1 MHz Nortek Aquadopp and a 1200kHz Teledyne RiverPro, respectively), four stationary and one profiling multiparameter water quality profiling sondes (YSI 6920), a stationary acoustic backscattering sensor (ABS, Sequoia LISST-ABS), a stationary laser diffraction particle size analyzer (Sequoia LISST100x), and a settling chamber with an integrated video camera used to measure in-situ particle size and settling rates (see Manning and Dyer, 2002). All data from the boat-mounted ADCP is provided in "Boat_mounted_ADCP_data.zip". All data from the LISST100x is provided in "LISST100x.zip". Data from the remaining instrumentation is provided in seperate .csv files. Data collection occurred at two primary locations. At a pier of Dumbarton Bridge at 37.5056361, -122.1188833 (all coordinates herein are provided in WGS84) collocated with NWIS station 373015122071000 and at nearby cross-channel transect defined between 37.4986167, -122.1181833 (River Left) to 37.5029500, -122.1117167 (River Right). All stationary instrumentation was mounted to two locations on a pier of Dumbarton Bridge. Mobile instrumentation, the boat-mounted ADCP and profiling multiparameter water quality sondes, were utilized to measure water velocity and estimate suspended-sediment concentration profiles at the cross-channel transect and at the bridge pier. Latitude, longitude, and depth from water surface for each sample collected by the mobile instrumentation is provided in the data files. Cross-section averaged estimates of suspended-sediment flux were computed using the methods of Livsey and others (2020) and references therein. References Livsey, D.N., Downing-Kunz, M.A., Schoellhamer, D.H. and Manning, A.J., Suspended Sediment Flux in the San Francisco Estuary: Part I—Changes in the Vertical Distribution of Suspended Sediment and Bias in Estuarine Sediment Flux Measurements. Estuaries and Coasts, pp.1-17. https://doi.org/10.1007/s12237-020-00734-z Manning, A.J. and Dyer, K.R., 2007. Mass settling flux of fine sediments in Northern European estuaries: measurements and predictions. Marine Geology, 245, 107-122, doi:10.1016/j.margeo.2007.07.005.