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Table 2. Summary of the Prospect Island Monitoring Proposal



Water Quality






Organic Carbon

Ave. Annual Cost










Principal Investigators

Mike Chotowski
Randy Baxter

Laurie Briden

Hank Gebhard
Katie Wadsworth

Kent Nelson
Jean Witzman

Peggy Lehman

Jim Orsi

Cindy Messer

Howard Mann

Peggy Lehman
Collette Zemitis

Monitoring Objectives

Quantify use of island by various fish species; qualify spawning use and larval rearing by delta smelt & spittail; quantify salmon fry/smolt use

Quantify wildlife use in open water, mud flat, emergent marsh, and riparian habitats Determine water quality conditions in different aquatic habitats on Prospect Island Characterize plant communities in different habitats on Prospect Island and how they change over time

Evaluate phytoplankton species composition, biomass, primary productivity, nutrients, sediments and ancillary water quality data

Determine which zooplankton species, mysid shrimp, and amphipods are utilizing the Prospect Island restoration site

Evaluate benthic macro fauna and substrate composition Evaluate changes in habitat features due to siltation and erosion

Determine if Prospect Island is a source of organic carbon and potential THM production

Data Usage

To show fish benefits of project

To show wildlife benefits of project

Provide information on water quality conditions that affect aquatic species

To show vegetation succession of project, effects of physical processes on plants

To evaluate phyto-plankton concentrations, an important component of the food chain

To evaluate zooplankton species composition, an important component of the food chain

To evaluate benthic species, an important component of the food chain

To provide information of the success of habitat features useful for adaptive management decisions

To determine the potential effect on water quality with respect to organic carbon concentrations and potential effects on the food web

Data Acquisition (Methodology)

Quarterly sampling of all fish species. Mid-February to Mid-June, bi-monthly sampling of delta smelt and splittail spawning. Mid-February to Mid-June weekly sampling of smelt and splittail larval rearing. December through May, weekly sampling of salmon fry / smolt use. All sampling on both spring and neap tides. Gear includes purse seine (delta smelt), gill nets (splittail), push nets, beach seine, light traps, egg and larval nets and electrofishing

A combination of sampling methods (point counts, canoe surveys, incidental surveys, rail counts, walking transects, live trapping and pit fall traps) will be used to quantify and determine the types of wildlife in various habitats of Prospect Island

Samples will be collected on a continuous basis year round. Two (permanent) full component stations will monitor the following parameters: specific conductance, water temp, dissolved oxygen, pH, turbidity, stage, chlorophyll, wind speed & direction, solar radiation, air temp, barometric pressure, and humidity. In addition, three portable systems will measure a combination of the water quality parameters listed above.

Baseline plant communities within the project site will be compared with developing plant communities over time. Site specific plant community characterizations will also be conducted.

Discrete monitoring will be conducted year round on a monthly basis. Samples for chlorophyll concentrations will be taken at 1 meter depths. Additional water samples will be taken for phytoplankton species identification. Chlorophyll concentrations, sediments and nutrients will be measured daily for 2 weeks between April and September in association with carbon flux study.

Zooplankton samples will be collected year-round on a monthly basis with Clark-Bumpus nets, a ski mounted Neo-mysis net or egg & larval net w/505 �m mesh, and a 151/min capacity pump.

Benthic samples will be collected on a monthly basis. Four benthic samples will be collected at each site with a Birge- Ekman dredge. Samples will then be washed and preserved in formalin. Benthic organisms will be analyzed by an outside contractor.

A horizontal and vertical control around the project will be complete before the island is flooded. Baseline evaluations of representative projects features (berms, islands, levees, shallow water, excavated channel) be established after flooding. Annual elevation surveys will be conducted to monitor erosion, accretion, and subsidence.

Continuous samples will be collected by auto-samples at the levee breaches during incoming and outgoing tides. Samples will be analyzed for dissolved and particulate organic carbon and ultra-violet absorbance. Grab samples will also be collected monthly at various stations in Prospect Island. These samples will be analyzed for dissolved and particulate organic carbon and ultraviolet absorbance. Selected samples will also be analyzed for trihalomethane formation potential, haloacetic acid formation potential, and dissolved ammonia.

Data Reduction, Analysis, and Reporting

Information for all elements will be presented in the quarterly IEP Newsletters and in an annual report to CALFED. Data will be available through the IEP Home Page.