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  • Title

    Risk of fish predation within and across tidal wetland complexes

    Lead University of California - Davis [UC Davis]
    Description

    This study focuses on understanding how restored tidal wetlands with different physical configurations function as refuge and rearing habitat for fishes, including native and imperiled species such as delta smelt and juvenile Chinook salmon. This research will assess the spatial distribution of predation risk as it varies within and across tidal wetlands. The proposed research will generate a statistical model that helps predict predation outcomes from various restored tidal wetland designs and channel configurations. This will be a powerful tool for managers to forecast how proposed habitat restoration or water management actions may impact native fish populations.
    Science topics Tidal wetlands
    Updated February 27, 2025
  • Title

    The effect of temperature on predation of juvenile salmonids

    Lead University of California - Davis [UC Davis]
    Description

    This study will investigate fish swim performance in response to temperature, using salmon and two of its known predators: largemouth bass and Sacramento pikeminnow. The researcher will assess swim performance metrics and predation risk inside and outside the ideal thermal range of each species to determine if a temperature advantage predicts salmon survival in predation scenarios. This project’s results will provide a mechanistic understanding of how temperature stress may influence mortality risk of juvenile Chinook salmon through predation, which will offer a more holistic perspective on the management of this species
    Science topics Temperature
    Updated February 27, 2025
  • Title

    Freeport Regional Water Project

    Lead East Bay Municipal Utilities District
    Description The Freeport Regional Water Authority (FRWP) is a cooperative effort of the Sacramento County Water Agency (SCWA) and the East Bay Municipal Utility District (EBMUD) of Oakland to supply surface water from the Sacramento River to customers in central Sacramento County and the East Bay area of California.
    Science topics Surface water / flow, Stage, Drought, Environmental drivers
    Updated April 29, 2022
  • Title

    California Recreational Fisheries Survey [CRFS]

    Lead California Department of Fish and Wildlife [CDFW]
    Description The California Recreational Fisheries Survey (CRFS) mission is to collect fishery-dependent data on California’s marine recreational fisheries, and to accurately estimate catch and effort in a time frame and on a scale that meets management needs. CRFS collects the data necessary to estimate catch and effort for California’s diverse recreational finfish fisheries which range from the California-Mexico border to the California-Oregon border extending over 1,100 miles of coast, and is surveyed at over 400 sampling sites. Annually, CRFS conducts over 7,000 sampling assignments and contacts over 68,000 fishing parties. High sampling rates produce confidence in estimates with a 20 percent sample rate of private boat anglers during salmon or groundfish seasons. CRFS collects the data to produce the estimates for all sport-caught finfish.
    Science topics Fishing
    Updated April 29, 2022
  • Title

    California Fish Passage Assessment Database [PAD]

    Lead Pacific States Marine Fisheries Commission [PSMFC]
    Description The Passage Assessment Database (PAD) is an ongoing map-based inventory of known and potential barriers to anadromous fish in California, compiled and maintained through a cooperative interagency agreement. The PAD compiles currently available fish passage information from many different sources, allows past and future barrier assessments to be standardized and stored in one place, and enables the analysis of cumulative effects of passage barriers in the context of overall watershed health. The database is set up to capture basic information about each potential barrier. It is designed to be flexible. As the database grows, other modules may be added to increase data detail and complexity.
    Science topics Water operations / exports, Water storage, Water conveyance / infrastructure, Main channels, Chinook Salmon, Steelhead Trout, Water intakes, fish screens & passage
    Updated April 29, 2022
  • Title

    Telemetered Stream Gauge Stations [Surface Water Monitoring]

    Lead U.S. Bureau of Reclamation [USBR]
    Description A network of stream gauges record and telemeter river stage information. Flow measurements by field crews help calibrate and confirm calculations. Data from stream gage telemetry requires careful consideration as field conditions and equipment malfunctions can provide erroneous readings. A more accurate assessment of actual flow rates requires a review of the flow record and processing to account for actual conditions.
    Science topics Water operations / exports, Water conveyance / infrastructure, Surface water / flow, Stage, Flood, Main channels, Sloughs
    Updated April 29, 2022
  • Title

    Water Quality Monitoring

    Lead U.S. Bureau of Reclamation [USBR]
    Description Water Quality includes a program of real-time telemetry, generally with 15-minute reporting to the California Data Exchange Center. In addition, the SJRRP initiated a program of manual water quality constituent measurements. Reclamation will evaluate shallow groundwater, irrigation supply, subsurface drain system and San Joaquin River water quality for SJRRP seepage investigations.
    Science topics Chlorophyll A / B, Water temperature, Dissolved oxygen, pH, Turbidity, Insecticides, Rodenticides, Herbicides, Fungicides, Other discharge contaminants, Main channels, Sloughs, Conductivity
    Updated April 29, 2022
  • Title

    Yolo Bypass Fish Monitoring

    Lead California Department of Water Resource [DWR]
    Description California Department of Water Resources (DWR) has operated a fisheries monitoring program in the Yolo Bypass, a seasonal floodplain and tidal slough, since 1998. The objectives of the Yolo Bypass Fish Monitoring Program (YBFMP) are to: (1) collect baseline data on lower trophic levels (phytoplankton, zooplankton, and aquatic insects), juvenile fish and adult fish, hydrology, and water quality parameters;(2) investigation of the temporal and seasonal patterns in chlorophyll-a concentrations, including whether high concentrations are exported from the Bypass during agricultural and natural flow events and the possibility of manipulating bypass flows to benefit listed species like Delta Smelt (Hypomesus transpacificus) and Chinook salmon (Oncorhynchus tshawytscha). The YBFMP operates a rotary screw trap and fyke trap, and conducts biweekly beach seine and lower trophic surveys in addition to maintaining water quality instrumentation in the bypass. The YBFMP serves to fill information gaps regarding environmental conditions in the bypass that trigger migrations and enhanced survival and growth of native fishes, as well as provide data for IEP synthesis efforts.
    Science topics Chinook Salmon, Chlorophyll A / B, Conductivity, Delta Smelt, Direction, Dissolved oxygen, Endangered species, Fish, Flood, Food webs, Green sturgeon, Habitat, Habitat restoration, Insects, Intertidal / transition zones, Invasive / non native species, Invertebrates, Longfin Smelt, Main channels, Nitrogen, Nitrogen / ammonia, Nutrients, Other species, Other zooplankton, Pelagic fish, pH, Phytoplankton, Primary production, Sacramento Splittail, Salmon migration, Salmon rearing, Saltwater / freshwater marshes, SAV/FAV, Seasonally flooded, Solar irradiance, Stage, Steelhead Trout, Striped bass, Sturgeon, Submerged aquatic vegetation, Surface water / flow, Tides, Turbidity, Velocity, Water, Water temperature, Wetlands, White Sturgeon, Zooplankton
    Updated August 28, 2024
  • Title

    Continuous Monitoring of Water Quality & Suspended-Sediment Transport [Bay-Delta]

    Lead U.S. Geological Survey [USGS]
    Description Our group at the USGS continuously monitors suspended-sediment concentration (SSC), turbidity, dissolved oxygen, temperature, salinity, and water level at many sites throughout the San Francisco Bay (Bay) and the Sacramento-San Joaquin Rivers Delta (Delta). Our work began in 1988 to explore the spatial and temporal variability of water quality and sediment transport and to provide decision makers, resource managers, and the public with the most up-to-date knowledge. Topics we study include water quality, sediment transport, water clarity, erosion and deposition, sediment-associated contaminants and habitat quality, wetland restoration, and sea level rise.
    Science topics Water operations / exports, Water storage, Water conveyance / infrastructure, Surface water / flow, Stage, Velocity, Suspended sediment, Bedload, Deposition, Erosion, Chemistry, Toxicity, Salinity, Water temperature, Dissolved oxygen, Turbidity, Other discharge contaminants, Intertidal / transition zones, Main channels, Sloughs, Open water, Riparian wildlife, Conductivity, Water use / demand, Water intakes, fish screens & passage
    Updated April 29, 2022
  • Title

    SAIL [Coordinated Enhanced Acoustic Telemetry Program]

    Lead U.S. Bureau of Reclamation [USBR]
    Description These monitoring efforts can provide critical information on juvenile salmonid distribution and survival, which inform biologists and managers interpretations of the exposure and intensity of CVP and SWP water operation risks on tagged populations in Central Valley rivers and the Bay- Delta. Understanding salmon survival and migration dynamics in the Delta and its tributaries is critical to the recovery of ESA-listed species, and sport and commercial fisheries management. For example, estimating the population size of endangered Sacramento River Winter-run Chinook (SRWRC) as they enter and exit the Delta is considered critical for informing Delta water management actions (Interagency Ecological Program (IEP) SAG 2013). “The use of realtime acoustic receivers that immediately transmit acoustic tagged (AT) fish detections needs to be included in the expanded network” (Johnson et al., in press). Tracking the fate of individual tagged fish will be accomplished with AT and used to develop estimates of survival and movement for other non-AT fish also part of that group. Population level sampling programs will use survival estimates generated by AT and applied to other mass marked (coded wire tagging) groups to develop improved capture efficiency for these sampling programs. Objectives: • Deploy and service field monitoring acoustic telemetry stations at locations important to fish and water management. • Implant, transport, and release acoustically tagged juvenile ESA-listed wild and hatchery juvenile salmonids. • Analysis and synthesis to support production and development of new metrics for understanding the survival, distribution, and entrainment of juvenile salmonid along the Sacramento River and its floodways, as well as, the Bay-Delta. Six-Year Steelhead Study Continuation Reclamation’s Proposed Action for ROC on LTO Section 4.10.5.12.3 Additional Measures includes a San Joaquin Basin Steelhead Telemetry Study -- Continuation of the 6-Year Steelhead telemetry study for the migration and survival of San Joaquin Origin Central Valley Steelhead. This investigation involves undertaking experiments utilizing acoustically-tagged salmonids to confirm proportional causes of mortality due to flows, exports, and other project and non-project adverse effects on steelhead smelt out-migrating from the San Joaquin Basin and through the southern Delta. This study is to coincide with different periods of operations and focus on clipped hatchery steelhead (Oncorhynchus mykiss). The period of interest is between February 15 and June 15, which coincides with a majority of O. mykiss outmigration from the Stanislaus River and recoveries of steelhead smolts in the Mossdale fish monitoring efforts. This period is to include changes in CVP/SWP operations that include reductions in exports, reductions in reverse flows in Old and Middle rivers (OMR), and San Joaquin River pulse flows to assess the influence of flow and exports on juvenile steelhead survival. This study is designed to evaluate juvenile steelhead route selection at channel divergences in the south Delta and along the mainstem San Joaquin River, and how these behaviors influence survival in specific reaches and through the Delta to Chipps Island.
    Science topics None specified
    Updated April 29, 2022