IEP Data and Metadata

The Interagency Ecological Program (IEP) monitoring studies have collected hydrodynamic, water quality, and biological data in the San Francisco Bay-Delta since 1959.

Over the decades, surveys have been added or modified in both geographic scope or in protocol. Surveys vary with respect to their period of record, their geographic and seasonal coverage, and in the types of the data they collect.

The goals of this page are to provide an overview of IEP surveys and the diversity of data they collect, and to provide direct access to metadata and data for all possible surveys.

Table 1 provides an overview of existing long-term monitoring programs of IEP and illustrates the data types currently collected by each survey. Tables 2-4 provide detailed information and links to metadata and data for individual surveys focused on water quality, phytoplankton, invertebrates, and fish. Fish surveys found in Table 4 include additional data types collected along-side fish sampling, such as discrete water quality and zooplankton.

Table 1.

Program

IEP PEN

Hydrodynamics

Discrete Water Quality

Continuous Water Quality

Phytoplankton

Zooplankton

Benthic Invertebrates

Fish

Fall Midwater Trawl

003

 

X

 

 

X

 

X

Summer Townet Survey

007

 

X

 

 

X

 

X

Bay Study

011/ 012

 

X

 

 

 

X

X

Bay Salinity Monitoring

029

 

X

X

 

 

 

 

Delta Flow network

030

X

 

X

 

 

 

 

20-mm Survey

033

 

X

 

 

X

 

X

Delta Juvenile Fish Monitoring Program

053/301/302

 

X

 

 

 

 

X

Environmental Monitoring Program

072/077

 

X

X

X

X

X

 

San Joaquin River Dissolved Oxygen Monitoring

073

 

X

X

 

 

 

 

Knights Landing Juvenile Salmon

074

 

X

 

 

 

 

X

Spring Kodiak Trawl

088

 

X

 

 

 

 

X

Suisun Marsh Survey

093

 

X

 

 

X

 

X

Smelt Larval Survey

096

 

X

 

 

 

 

X

Operation of Thermograph Stations

104

 

X

 

 

 

 

 

Adult Striped Bass Population Estimates

002

 

X

 

 

 

 

X

Adult Sturgeon

005

 

X

 

 

 

 

X

Yolo Bypass Fisheries Monitoring Survey

047

 

X

X

X

X

 

X

Liberty Island Fish Survey

279

 

X

 

 

X

 

X

Table 2. Hydrodynamic and Water Quality Surveys

Program

Agency

Contact Information

Descriptor

Start Year

Sample Site Map (and shapefiles if available)

Metadata Link

Download Data

Delta Flow Network

United States Geological Survey (USGS)

Cathy Ruhl
cruhl@usgs.gov
(916) 278-3129

Real-time flow and water-quality

1988

Map

Continuous Water Quality
Flow Data

Data

Data Management Plan

Bay Salinity Monitoring

USGS

Maureen Downing-Kunz
mdowning-kunz@usgs.gov
(916) 278-3051

Real-time, continuous water-quality

1989

Map

Continuous Water Quality
Discrete Water Quality

Data

Data Management Plan

Environmental Monitoring Program: Discrete Water Quality

Department of Water Resources (DWR)

Jenna Rinde
(916) 376-9644

Physical and chemical constituents collected monthly

1975

Active Historic

Discrete Water Quality

Data

Estuary Portal

Data Management Plan

Continuous Water Quality

DWR

Scott Waller 
(916) 376-9775

D-1641 compliance stations-water quality data is collected every 15-minutes and telemetered to CDEC

1978

Active & Historic

Continuous Water Quality

Data

Contact
Mike Dempsey

Data Management Plan

DWR

 

 

 

Rolf Frankenback
(916) 376-9661

Water quality data is collected every 15-minutes and telemetered to CDEC

1998

Map and coordinates provided in metadata

Water Quality Evaluation Section

Water Data Library Home

USGS

 

 

 

See above under Delta Flow Network

United States Bureau of Reclamation (USBR)

 

Arien Chavez

 

 

 

 

 

National Oceanic and Atmospheric Administration (NOAA)

 

 

 

 

 

 

San Joaquin River Dissolved Oxygen Monitoring

DWR

Jenna Rinde
(916) 376-9773

Dissolved oxygen data is collected bimonthly during the summer and fall

1968

 

 

Contact
Jenna Rinde

Data Management Plan

Yolo Bypass Fish Monitoring Program: Continuous Water Quality

DWR

Brian Schreier
(916) 376-9759

Several stations in Yolo Bypass and one comparison location in Sacramento River

1999 and various (site dependent)

Map

 

Contact

Brittany Davis

Data Management Plan

 

Table 3. Phytoplankton, Zooplankton, and Benthic Invertebrate Surveys

Program

Agency

Contact Information

Descriptor

Start Year

Sample Site Map (and shapefile if available)

Metadata
Link

Download Data

Environmental Monitoring Program: Phytoplankton

DWR

Tiffany Brown
(916) 376-9723

Monthly chlorophyll and phytoplankton samples collected throughout the estuary

1975

Active Monitoring Stations

Historically Sampled Stations

Estuary Portal

Data

Data Management Plan

Yolo Bypass Fish Monitoring Program: Lower Trophic

DWR

Brian Schreier
(916) 376-9759

Biweekly samples in Yolo Bypass, and one comparison location in the Sacramento River

Chlorophyll: 2001 and various (site dependent); Phytoplankton: 2015

Zooplankton: 1998; Drift Invertebrates: 1998

Map - YBFMP Lower Trophic Sites

YBFMP Metadata - Chlorophyll

YBFMP Metadata - DriftInvert

YBFMP - Egg and Larvae

YBFMP - Zooplankton

Contact
Brittany Davis 

Data Management Plan

Environmental Monitoring Program: Benthics

DWR

Betsy Wells
(916) 376-9821

Benthic samples collected monthly at ten sites located throughout the estuary

1975

Map 1 - Benthic Historic Monitoring Stations

 

Map 2 - Benthic Active Monitoring Stations

Benthic Organisms

Data

Data Management Plan

Environmental Monitoring Program: Zooplankton

CDFW

April Hennessy
(209) 234-3665

Monthly microzooplankton (63-150 microns), mesozooplankton (150-500 microns), and mysid (>500 microns) samples collected throughout the estuary

1975

Actively sampled stations

Zooplankton

Data

Data Management Plan

Fall Midwater Trawl: Zooplankton

CDFW

Randy Baxter,
(209) 234-3483

A subset of stations are sampled for zooplankton: Clarke-Bumpus (CB)and mysid nets

2005 Sep only, 2011 Sep-Dec

Map

Metadata

Data

Data Management Plan

Summer Townet Survey: Zooplankton

CDFW

Randy Baxter, (209) 234-3483

Zooplankton sampled during first tow (CB sample).

2005

Map

Metadata

Data

Data Management Plan

20-mm Survey: Zooplankton

CDFW

Bob Fujimura
(209) 234-3485

Zooplankton; CB samples, March-July

1995

Map

Metadata

Data

Bay Study: Benthics

CDFW

Kathy Hieb
(209) 234-3484

Decapods: shrimp, and crabs using otter trawls and midwater trawls throughout the Bay and upper estuary.

1980

 

Metadata included in zipped folders with Access databases

Data

Data Management Plan

Table 4. Fish Surveys

Program

Agency

Contact Information

Descriptor

Start Year

Site Map

Metadata Link

Download Data

Fall Midwater Trawl

CDFW

Randy Baxter,
(209) 234-3483

Fish survey using midwater trawls to target juvenile and adult fish throughout the upper estuary during the fall.

1967

Map

Metadata

Data

Monthly abundance indices

Data Management Plan

Summer Townet Survey

CDFW

Randy Baxter, (209) 234-3483

Fish survey targeting juvenile Delta Smelt and age-0 striped bass during June through August.

1959

Map

Metadata

Data

Delta Smelt abundance indices

Data Management Plan

Bay Study

CDFW

Kathy Hieb
(209) 234-3484

Survey of pelagic and demersal fish, shrimp, and crabs using otter trawls and midwater trawls throughout the Bay and upper estuary.

1980

 

Metadata included in zipped folders with Access databases

Data

Fish distribution maps

Data Management Plan

20-mm Survey

CDFW

Bob Fujimura
(209) 234-3485

Larval and small juvenile fish survey to determine timing, distribution and abundance of Delta Smelt larvae and their food supply (zooplankton; CB samples), March-July

1995

Map

Metadata

Data

Fish distribution maps

Data Management Plan

Delta Juvenile Fish Monitoring Program

United States Fish and Wildlife Service (USFWS)

Brian Mahardja
(209) 334-2968 Ext. 406

Beach seine and trawling surveys from San Pablo Bay to Colusa on Sacramento River and lower San Joaquin River

Beach seine, Chipps Island trawl: 1976; Sherwood Harbor (Sac River) trawls: 1988; Mossdale (San Joaquin River) trawl: 1994

Map and coordinates provided in metadata

Metadata

Data

Data Management Plan

Knights Landing Juvenile Salmon

CDFW

Colin Purdy
(916) 358-2943

Rotary screw traps in the Sacramento River fished from Oct-June targeting juvenile Chinook salmon.

1995

 

Contact
Colin Purdy

Data

Data Management Plan

 

Spring Kodiak Trawl

CDFW

Bob Fujimura
(209) 234-3485

Fish survey targeting adult, spawning delta smelt, Jan-May

2002

Map

Metadata

Data

Delta Smelt distribution maps

Data Management Plan

Suisun Marsh Survey

University of California, Davis (UCD)

Teejay O’Rear

 

Fish and invertebrate sampling in Suisun Marsh to document long-term population trends of native and introduced fishes.

1979

 

 

Contact
Teejay O’Rear

Data Management Plan

Smelt Larval Survey

CDFW

Bob Fujimura
(209) 234-3485

Near real-time distribution data for targeting larval smelt in the upper estuary, Jan-March

2009

 

Metadata

Data

Distribution maps

Data Management Plan

Striped Bass Study

CDFW

 

Monitors adult striped bass through creel surveys, mark-recapture studies, and commercial passenger fishing vessel log-book information.

1969

 

   

Summary graphs and reports

Data Management Plan

Sturgeon Study

CDFW

 

Monitors adult green and white sturgeon through creel surveys, mark-recapture studies, and commercial passenger fishing vessel log-book information.

1967

 

   

Summary graphs and reports

Data Management Plan

Yolo Bypass Fish Monitoring Program

DWR

Brian Schreier
(916) 376-9759

Biweekly beach seines, juvenile fish rotary screw trap (Jan – June); adult fish fyke net (October – June); biweekly larval fish tows in the Yolo Bypass.

Beach seines, rotary screw trap: 1998; Fyke trap, larval tows: 1999

Map – Beach Seine

Map - Fyke

Map – Rotary Screw Trap

Map – Eggs and Larvae

YBFMP Metadata-Fish

YBFMP Metadata - Egg&Larvae

 

Data 

Data Management Plan

Liberty Island Fish Survey

USFWS

Denise Barnard
(209) 334-2968 ext. 307

Larval fish sampling and monthly beach seine surveys inside Liberty Island.

 

 

Contact
Denise Barnard

Data Management Plan