A linked modeling approach has been undertaken to understand the impacts of climate and infrastructure on aquatic ecology water quality in San Francisco Bay-Delta region. The Delft3D Flexible Mesh suite is used this effort for its 3D hydrodynamics, salinity, temperature sediment dynamics, phytoplankton water-quality coupling infrastructure, linkage a habitat suitability model. hydrodynamic model component D-Flow FM, new unstructured finite-volume based In paper, FM applied investigate tidal,...

Central San Francisco Bay is the hub of a dynamic estuarine system connecting Joaquin and Sacramento River Deltas, Suisun Bay, Pablo to Pacific Ocean South Bay. To understand role that plays in sediment transport throughout system, it necessary first determine historical changes patterns deposition erosion from both natural anthropogenic forces.The extensive hydrographic survey was conducted 1853 by National Service (NOS) (formerly United States Coast Geodetic Survey (USCGS)). From 1894...

A high-resolution (10-meter per pixel) digital elevation model (DEM) was created for the Sacramento-San Joaquin Delta using both bathymetry and topography data. This DEM is result of collaborative efforts U.S. Geological Survey (USGS) California Department Water Resources (DWR). The base from a 10-m released in 2004 updated 2005 (Foxgrover others, 2005) that used Environmental Systems Research Institute(ESRI), ArcGIS Topo to Raster module interpolate grids single beam bathymetric surveys...

Central San Francisco Bay is the deepest subembayment in estuary and hence has largest water volume of any subembayments. It also strongest tidal currents coarsest sediment within estuary. Tidal are over west-central part central bay and, correspondingly, this area dominated by sand-size sediment. Much east a line from Angel Island to Alcatraz characterized muddy sand sandy mud, west sandy. The furthermore molded energetic into bedforms varying sizes wavelengths. Bedforms typically occur...

First posted June 14, 2017 For additional information, contact: Pacific Coastal and Marine Science Center U.S. Geological Survey 2885 Mission St. Santa Cruz, CA 95060 Climate change, sea-level rise, human development have contributed to the changing geomorphology of San Francisco Bay - Delta (Bay-Delta) Estuary system. The need predict scenarios change led a new seamless, high-resolution digital elevation model (DEM) – that can be used by modelers attempting understand potential future...

First posted January 5, 2012 Revised June 24, 2020 For additional information, contact: Pacific Coastal and Marine Science CenterU.S. Geological Survey2885 Mission StreetSanta Cruz, CA 95060 In 2010, the U.S. Survey (USGS), Center completed three cruises to map bathymetry of main channel shallow intertidal mudflats in southernmost part south San Francisco Bay. The surveys were merged generate comprehensive maps Coyote Creek (from Calaveras Point east railroad bridge) Alviso Slough bay town...

First posted March 31, 2023 For additional information, contact: Pacific Coastal and Marine Science CenterU.S. Geological Survey2885 Mission St.Santa Cruz, CA 95060 Bathymetric change analyses document historical patterns of sediment deposition erosion, providing valuable insight into the dynamics coastal systems, including pathways sediment-bound contaminants. In 2014 2015, Office for Management, in partnership with National Oceanic Atmospheric Administration (NOAA) provided funding new...

This data release contains information on gravity cores that were collected by the U.S. Geological Survey in area of San Pablo Bay and Carquinez Strait, California 1990, 1991, 2000. Ten (10) pdf files describe split, photographed, imaged X-rays, another file a core-log legend. In addition, shapefile (sanpablo_spls.shp) provides sample collection data. Seventy-two 2000 from California. Gravity contain bioturbated laminated silts sandy clays, whole broken bivalve shells (mostly mussels),...

Data are reported here from 51 gravity cores collected the southern part of San Francisco Bay by U.S. Geological Survey in 1990. The sedimentary record demonstrates a stable geographic distribution facies and spans few thousand years. Carbon-14 dating sediments suggests that sedimentation rates average about 1 mm/yr. geometry bay floor character sediment deposited have remained same time spanned cores. However, over periods centuries or decades is likely to be much more variable. Sediments...

First posted June 27, 2017 For additional information, contact: Pacific Coastal and Marine Science CenterU.S. Geological Survey 2885 Mission St.Santa Cruz, CA 95060 Seventy-two gravity cores were collected by the U.S. in 1990, 1991, 2000 from San Pablo Bay Carquinez Strait, California. The within contain bioturbated laminated silts sandy clays, whole broken bivalve shells (mostly mussels), fossil tube structures, fine-grained plant or wood fragments. Gravity channel wall of Strait east...

Projected future wave-driven flooding depths on Roi-Namur Island Kwajalein Atoll in the Republic of Marshall Islands for a range climate-change scenarios. This study utilized field data to calibrate oceanographic and hydrogeologic models, which were then used with sea-level rise projections explore effects atoll islands their freshwater resources. The overall objective this effort, due large uncertainty emissions (and thus climate change scenarios) that is largely irreducible, was reduce...