The database will be unavailable for several hours on Saturday, January 10th, 2026, for system upgrades starting at 10am Pacific.
Metadata and Methods
The following are the Metadata and Methods information available for datasets offered in the SacPAS database.
Metadata
- Delta Smelt Metadata
- GrandTab, California Central Valley Chinook Escapement Database Metadata
- Juvenile Sampling & Monitoring Metadata (rotary screw traps, trawls, beach seines)
- River Conditions Metadata
- Salvage and Loss Metadata
Methods
Methods and background information for data aggregation, processing, and calculations in SacPAS Data & Alerts products.
- Chinook Salmon Loss Estimation for Skinner Delta Fish Protective Facility and Tracy Fish Collection Facility, 7/9/2018 CDFW (external link)
- Exposure Index Methods and Explanation of Summary Table Fields
- Hydrologic Classification Indices (HCI) Methods
- Juvenile Production Estimates (JPE) Methods from JPE Letters
- OMR Tidally Filtered Flow and Index (OMRI) Calculations as performed by SacPAS
- Smolt-to-Adult Ratio (SAR) estimates for CWT Methods