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Data Set Notes:

SacPAS presents historical and current smelt sampling aggregated across numerous surveys based on the current EDSM strata boundaries to illustrate distribution and abundance. SacPAS aggregates multiple sampling efforts with publicly available data and methods, combining their results into a single table for generating displays and analysis.

The survey datasets were download from their various online sources and imported into the SacPAS database. Updates are acquired as they become available. EDSM and Salvage data are updated daily, DJFMP sampling are updated weekly, and other surveys are updated annually. Unique site identifiers for all sites across the surveys are conflated. Site IDs with multiple names or descriptions but the same location were standardized with multiple, nearby Lat-Lon values averaged to eliminate duplicate entries. YY-DD prefixes on EDSM station codes were removed. The unique sites were located on a map with positions compared to the strata boundaries of the EDSM dataset. Each unique site was assigned their appropriate EDSM stratum based on their mapped location. The evolving nature of EDSM strata over the years causes some confusion with appropriate assignment, especially in the Cache Slough and Deep Water Shipping Channel strata. As a result, most EDSM data sites retain their original strata designations except the EDSM risk/density strata are assigned by location. The SWP and CVP Salvage facilities in the South Delta are assigned their own stratum: "Salvage".

Information Pages

• Bay-Delta Studies and Surveys, CDFW
• Fish Salvage Monitoring, CDFW Bay Delta Region
• Interagency Ecological Program (IEP) Monitoring Programs Information pages
  • 20-mm
  • DJFMP
  • Fall Midwater Trawl
  • SF Bay Study
  • Spring Kodiak

Data Sources

• 20-mm, Delta Smelt Larval Survey, North Bay Aquaduct Survey, Spring Kodiak Trawl, and San Francisco Estuary Smelt Larva Survey, CDFW
• Enhanced Delta Smelt Monitoring, Interagency Ecological Program and US Fish and Wildlife Service: San Francisco Estuary Enhanced Delta Smelt Monitoring Program data for the finalized dataset
• Fall Midwater Trawl Survey, CDFW
• Salvage Database, CDFW
• San Francisco Bay Study, CDFW
• San Francisco Estuary Smelt Larva Survey, Interagency Ecological Program, EDI
• Townet Survey, CDFW

Metadata Documents

• 20-mm metadata document, CDFW
• Delta Smelt Larval Survey metadata document, CDFW
• Enhanced Delta Smelting Monitoring EDI Data Portal
• North Bay Aquaduct Survey metadata document, CDFW
• San Francisco Estuary Smelt Larva Survey metadata document, CDFW
• Spring Kodiak Trawl metadata document, CDFW
• Townet Survey, CDFW