Bay Delta Region
Studies and Surveys
- 20mm Survey
- Fall Midwater Trawl
- Fish Salvage Monitoring
- San Francisco Bay Study
- Smelt Larva Survey
- Special Studies
- Spring Kodiak Trawl
- Striped Bass Study
- Sturgeon Study
- Townet Survey
- Zooplankton Study
- All Surveys and Studies
Other BDR Links
Main Office
2825 Cordelia Road, Suite 100
Fairfield, CA 94534
(707) 428-2002
Stockton Office
2109 Arch Airport Rd
Stockton, CA 95206
(209) 234-3420
Acting Regional Manager:
Scott Wilson
Related Programs
Delta Smelt Indices
Delta Smelt Indices
YEAR | INDEX |
---|---|
1959 | 12.1 |
1960 | 25.4 |
1961 | 21.3 |
1962 | 24.9 |
1963 | 1.8 |
1964 | 24.6 |
1965 | 6.0 |
1966 | |
1967 | |
1968 | |
1969 | 2.5 |
1970 | 32.5 |
1971 | 12.5 |
1972 | 11.1 |
1973 | 21.3 |
1974 | 13.0 |
1975 | 12.2 |
1976 | 50.6 |
1977 | 25.8 |
1978 | 62.5 |
1979 | 13.3 |
1980 | 15.8 |
1981 | 19.8 |
1982 | 10.7 |
1983 | 2.9 |
1984 | 1.2 |
1985 | 0.9 |
1986 | 7.9 |
1987 | 1.4 |
1988 | 1.2 |
1989 | 2.2 |
1990 | 2.2 |
1991 | 2.0 |
1992 | 2.6 |
1993 | 8.2 |
1994 | 13.0 |
1995 | 3.2 |
1996 | 11.1 |
1997 | 4.0 |
1998 | 3.3 |
1999 | 11.9 |
2000 | 8.0 |
2001 | 3.5 |
2002 | 4.7 |
2003 | 1.6 |
2004 | 2.9 |
2005 | 0.3 |
2006 | 0.4 |
2007 | 0.4 |
2008 | 0.6 |
2009 | 0.3 |
2010 | 0.8 |
2011 | 2.2 |
2012 | 0.9 |
2013 | 0.7 |
2014 | 0.5 |
2015 | 0 |
2016 | 0 |
2017 | 0.2 |
2018 | 0 |
2019 | 0 |
2020 | 0 |
2021 | 0 |
2022 | 0 |