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Water-Quality Measurements in San Francisco Bay – a component of ~ 40,000 measurements per year.

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Presentation on theme: "Water-Quality Measurements in San Francisco Bay – a component of ~ 40,000 measurements per year."— Presentation transcript:

1 Water-Quality Measurements in San Francisco Bay – a component of ~ 40,000 measurements per year

2 San Francisco Convention & Visitors Bureau Photo Why Monitoring?

3 SERL USGS USGS-RMP #1 – Measures Benefits of Actions to Improve Water Quality

4 Nutrient over-enrichment is a significant problem for the coastal regions of the United States… Of 139 coastal sites.. 44 experiencing symptoms such as low dissolved oxygen, nuisance and toxic algal blooms… National Coastal Nutrient Management strategy … to provide local decision-makers and those responsible for implementing management activities with the information they will need to determine appropriate source reduction goals and methods at the local level. NRC (2000)

5 #2 – Measures Environmental Condition so Management Priorities can be Established

6 But … continued monitoring is essential because …. Dinophysis acuminata Pseudonitzschia delicastissima

7 wwrcamnl.wr.usgs.gov/tracel/data #3 – Measures Benefits of Reducing Point-Source Inputs of Contaminants

8 #4 – Identifies Changes in Contaminant Sources Then, point-source inputs Now, urban runoff

9 #5 – Measures Disturbance by Alien Species Interagency Ecological Program and USGS

10 The ecological impacts of the Potamocorbula invasion are as dramatic as any documented in the literature, and provided the impetus for the Boards 303(d) listing decision. 303(d) LIST FOR SAN FRANCISCO BAY Exotic Species Mercury Copper Diazinon PCBs Selenium Nickel

11 Monitoring of the Bay is not complete Nutrients Phytoplankton Community Zooplankton Ecosystem Processes Benthos


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