Biological Monitoring & Assessment

Funded by the State Water Project (SWP), the Biological Monitoring and Assessment Program is conducted in collaboration with the California Department of Fish and Wildlife (CDFW) and consists of 5 categories:

  • Benthic Organisms
  • Phytoplankton
  • Zooplankton
  • Yolo Bypass Fish Monitoring
  • EcoRestore Fish Passage Monitoring

In concert with the CDFW’s Zooplankton group, we collect discrete biological data in the Sacramento-San Joaquin Estuary. Benthic Organisms, phytoplankton and zooplankton monitoring efforts are in compliance with the State Water Resources Control Board's Water Right Decision D-1641, which mandates a comprehensive water quality monitoring program, and is used to detect ecological changes in the upper estuary that are related to water project operations. 

Analysis of biological monitoring data by our Environmental Water Quality and Estuarine Studies (EWQES) branch addresses specific science and management questions on IEP Synthesis

Biological monitoring data collected by includes:

  • Organism identities
  • Catch per unit effort 

Contact Information

Benthic organisms:

Betsy Wells


Tiffany Brown


April Hennessy

Yolo Bypass Fish Monitoring:

Jared Frantzich

EcoRestore Yolo Bypass Fish Passage Restoration:

Josh Martinez