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Mercury speciation and other constituent data for surface water and bed sediment associated with the Hamilton Airfield Wetland Restoration, Novato, California. USA (ver. 4.0, March 2023) The Hamilton Wetland Restoration Project (HWRP) is a joint venture between the US Army Corps of Engineers (USACE; San Francisco District) and the California State Coastal Conservancy. The site is located on the property of the former Hamilton Army Airfield in Novato, California, along the western edge of San Pablo Bay, which is part of northern San Francisco Bay. The initial stages of wetland restoration, which included dredged sediment reuse, took place during 2009–2011. From 2011 until April 2014, the site was maintained as partially flooded through a temporary one-way culvert that allowed bay water onto the site. On April 25th, 2014, the outboard levee towards the north-eastern corner of the site was breached... Categories: Data, Data Release - Revised; Tags: Novato, San Francisco Bay, San Pablo Bay, USGS Science Data Catalog (SDC), biochemistry, All tags... boundaries, carbon isotope analysis, iron, mercury, mercury contamination, nutrient content (water), oxygen content (water), sediment geochemistry, sulfur, suspended material (water), wetland ecosystems, wetland restoration, Fewer tags Mercury speciation and other constituent data for surface water and bed sediment associated with the Hamilton Airfield Wetland Restoration, Novato, California. USA (ver. 2.0, June 2021) Note: This data release has been superseded by version 3.0, available here: https://doi.org/10.5066/P9Q2YP9K. The Hamilton Wetland Restoration Project (HWRP) is a joint venture between the US Army Corps of Engineers (USACE; San Francisco District) and the California State Coastal Conservancy. The site is located on the property of the former Hamilton Army Airfield in Novato, California, along the western edge of San Pablo Bay, which is part of northern San Francisco Bay. The initial stages of wetland restoration, which included dredged sediment reuse, took place during 2009–2011. From 2011 until April 2014, the site was maintained as partially flooded through a temporary one-way culvert that allowed bay water onto... Categories: Data, Data Release - Revised; Tags: Geochemistry, Novato, San Francisco Bay, San Pablo Bay, USGS Science Data Catalog (SDC), All tags... Water Quality, biochemistry, boundaries, carbon isotope analysis, iron, mercury, mercury contamination, nutrient content (water), oxygen content (water), sediment geochemistry, sulfur, suspended material (water), wetland ecosystems, wetland restoration, Fewer tags Shallow Sediment Geochemistry in a Mercury-Contaminated Multi-Habitat Floodplain: Cache Creek Settling Basin, Yolo County, California (version 2.0, August 2021) The Cache Creek Settling Basin (CCSB) is a 13.3 km2 leveed basin located at the terminal drainage of the Cache Creek watershed, immediately NE of the town of Woodland (Yolo County), California and approximately 18 km NW of Sacramento, California. The basin was constructed by the U.S. Army Corps of Engineers (completed in 1937 and modified in 1993) for the purpose of trapping suspended sediment transported from the upper Cache Creek watershed during high-flow events, thus preventing sediment from entering the Yolo Bypass, a larger downstream floodwater conveyance and agricultural zone. In addition to trapping suspended sediment, the CCSB also traps sediment-associated mercury (Hg), which is particularly elevated... Categories: Data Release - Revised; Tags: Cache Creek Settling Basin, Sacramento River Watershed, Sacramento–San Joaquin River Delta, Total Maximum Daily Load (TMDL), USGS Science Data Catalog (SDC), All tags... Woodland, CA, Yolo Bypass, Yolo County, aquatic ecosystems, basins, biogeochemistry, floodplains, mercury, methylmercury, watershed management, wetlands, Fewer tags Mercury speciation and other constituent data for surface sediment and water associated with the South San Francisco Bay Salt Pond Restoration, 2010-18 This dataset includes mercury and other constituent concentration and physical properties data for surface sediment, pore water and surface water collected as part of the South San Francisco Bay Salt Pond Restoration Phase 1 (2010 to 2018) studies. The overarching focus of these studies was to monitor mercury (Hg) biogeochemistry in both sediment and water in response to management actions associated with the conversion of former salt producing ponds to contemporary wetland habitat. The two primary management actions included the breaching of Pond A6 during December 2010, and the construction and operation of an adjustable tidal control structure (TCS) associated with the Pond A5/A7/A8 Complex beginning in June... Categories: Data; Tags: Alviso Slough, Alviso, CA, Environmental Health, Geochemistry, Mountain View, CA, All tags... Santa Clara County, USGS Science Data Catalog (SDC), Water Quality, aquatic ecosystems, bioaccumulation, biogeochemistry, ecosystem management, mercury, methylmercury, wetlands, Fewer tags Mercury speciation and other constituent data from deep sediment cores in Alviso Slough, South San Francisco Bay, California, 2012-16 This dataset includes mercury and other constituent concentration and physical properties data for seven deep sediment profiles (ranging from 79 cm to 214 cm in length) collected from the thalwag of Alviso Slough, a major tributary to South San Francisco Bay (California, USA). Field sampling occurred during May 2012 (4 sites) and January 2016 (3 sites). Each profile was comprised of 1–4 core sub-sections, which were collected from adjacent boreholes with 10–18 cm of vertical overlap. This data product includes two data tables (*.csv): 1) ‘T1_ALSL_DC_Sed_Data.csv’, the deep core analytical results; 2) ‘T2_ALSL_DC_QA_Data.csv’, quality assurance data. The two image files, ‘ALSL_DC_Log_2012.pdf’ and ‘ALSL-DC_Log_2016.pdf’,... Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service; Tags: Alviso Slough, San Francisco Bay, South Bay Salt Ponds, USGS Science Data Catalog (SDC), biogeochemistry, All tags... environment, geoscientificInformation, mercury, sediment cores, slough, slough, wetland restoration, Fewer tags The Measurement of Water Column Methylmercury Production Potential Rates in Four Oxygenated Reservoirs of the San Francisco Bay Watershed Valley Water (formerly Santa Clara Valley Water District) provides stream stewardship, wholesale water supply, and flood protection for Santa Clara County, California, in the southern San Francisco Bay Area. A number of the reservoirs owned by the agency sit in the eastern foothills of the Santa Cruz mountains above the city of San Jose and in the watershed below the former New Almaden Mining District, which was historically the largest mercury (Hg) mining district in North America. Aquatic biota in a number of these reservoirs have elevated levels of Hg, presumably as a result of their downstream location relative to the former mining district. The form of Hg that most readily accumulates in aquatic food webs is... Categories: Data; Tags: Almaden Reservoir, Calero Reservoir, California, Geochemistry, Guadalupe Reservoir, All tags... Stevens Creek Reservoir, USGS Science Data Catalog (SDC), Water Quality, environment, field sampling, mercury, suspended material (water), water chemistry, water sampling, Fewer tags Biogeochemical Data for Mercury and other Constituents in Surface Sediment and Deep Cores from the Hells Canyon Reservoir Complex, Idaho and Oregon 2014-2018 The Hells Canyon Complex (HCC) is comprised of a series of three consecutive reservoirs (Brownlee, Oxbow, and Hells Canyon) along a 145 km reach of the Snake River bordered by Idaho to the east and Oregon to the west. Due to concerns regarding mercury (Hg) contamination within the HCC, in cooperation with Idaho Power Company, the U.S. Geological Survey has been leading an investigation into the sources, transport, microbial transformations, chemical speciation and bioaccumulation of Hg in this complex river-reservoir environment. This data release is focused on the sediment component of this larger effort and includes data collected between 2014 and 2018 from shallow surface sediment (≤ top 5 cm) and from sectioned... Categories: Data; Tags: Brownlee Dam, Ecology, Environmental Health, Geochemistry, Hells Canyon, All tags... Oxbow Dam, Snake River, USGS Science Data Catalog (SDC), aquatic ecosystems, bioaccumulation, biogeochemistry, biota, ecosystem management, mercury, methylmercury, wetlands, Fewer tags Shallow Sediment Geochemistry in a Mercury-Contaminated Multi-Habitat Floodplain: Cache Creek Settling Basin, Yolo County, California, 2010–17 Note: This data release has been superseded by version 2.0, available here: https://doi.org/10.5066/P9MDXR3M. The Cache Creek Settling Basin (CCSB) is a 13.3 km2 leveed basin located at the terminal drainage of the Cache Creek watershed, immediately NE of the town of Woodland (Yolo County), California and approximately 18 km NW of Sacramento, California. The basin was constructed by the U.S. Army Corps of Engineers (completed in 1937 and modified in 1993) for the purpose of trapping suspended sediment transported from the upper Cache Creek watershed during high-flow events, thus preventing sediment from entering the Yolo Bypass, a larger downstream floodwater conveyance and agricultural zone. In addition to trapping... Tags: Cache Creek Settling Basin, Sacramento River Watershed, Sacramento–San Joaquin River Delta, Total Maximum Daily Load (TMDL), USGS Science Data Catalog (SDC), All tags... Woodland, CA, Yolo Bypass, Yolo County, aquatic ecosystems, basins, biogeochemistry, floodplains, mercury, methylmercury, watershed management, wetlands, Fewer tags Mercury speciation and other constituent data for surface water and bed sediment associated with the Hamilton Airfield Wetland Restoration, Novato, California. USA Note: This data release has been superseded by version 2.0, available here: https://doi.org/10.5066/P9VO9WM7. The Hamilton Wetland Restoration Project (HWRP) is a joint venture between the US Army Corps of Engineers (USACE; San Francisco District) and the California State Coastal Conservancy. The site is located on the property of the former Hamilton Army Airfield in Novato, California, along the western edge of San Pablo Bay, which is part of northern San Francisco Bay. The initial stages of wetland restoration, which included dredged sediment reuse, took place during 2009–2011. From 2011 until April 2014, the site was maintained as partially flooded through a temporary one-way culvert that allowed bay water onto... Categories: Data; Tags: Geochemistry, Novato, San Francisco Bay, San Pablo Bay, USGS Science Data Catalog (SDC), All tags... Water Quality, biochemistry, boundaries, carbon isotope analysis, iron, mercury, mercury contamination, nutrient content (water), oxygen content (water), sediment geochemistry, sulfur, suspended material (water), wetland ecosystems, wetland restoration, Fewer tags