Tools for Tracking Healthy Watersheds Central Coast Regional Water Quality Control Board Tools for Tracking Healthy Watersheds Karen Worcester, Staff Environmental Scientist Larry Harlan, Environmental Scientist David Paradies, Software Designer
Healthy Watersheds Goal 1: By 2025 80% of aquatic habitat is healthy; and the remaining 20% exhibits positive trends in key parameters Goal 2: By 2025 80% of lands within any watershed will be managed to maintain proper watershed functions, and the remaining 20% will exhibit positive trends in key watershed parameters Goal 3: By 2025 80% of groundwater will be clean, and the remaining 20% will exhibit positive trends in key parameters
Defining “Healthy” Biological measures Health Index Chemical measures Physical measures
Measures of Aquatic Health in Riparian Systems: An Example Chemical index Chemical measurements Chemical risk Physical index Watershed characteristics Geomorphology Channel alteration Biological index Bioassessment Toxicity Biostimulatory risk Pathogens Riparian characteristics
Biological index Bioassessment Ephemeroptera Taxa Plecoptera Taxa Tricoptera Taxa % Predators Taxa Diversity % Tolerant Species Intolerant Individual Count % Dominant Species Bioassessment Toxicity Biostimulatory risk Pathogens Riparian characteristics
Index of Biotic Integrity: A multimetric approach Community balance Trophic structure Taxa diversity Pollution tolerance
Gazos Creek, 5/5/01
IBI for Region CCAMP IBI Scores
Biological index Toxicity Ceriodaphnia survival Ceriodaphnia reproduction Pimephales survival Pimephales growth Selenastrum growth Hyalella survival Hyalella growth Bioassessment Toxicity Biostimulatory risk Pathogens Riparian characteristics
Index of Biotic Integrity and Toxicity Worst sites Best sites
Biological index Biostimulatory risk Oxygen Saturation (departure from median) pH (departure from median) Nutrient concentrations Algae (percent cover) Chloropyll a Benthic algae Maximum Potential Biomass Bioassessment Toxicity Biostimulatory risk Pathogens Riparian characteristics
Gazos Creek Biostimulatory Risk = 0.47
Franklin Creek (Rank = 85.3) Limekiln Creek (Rank = 0.0) Franklin Creek (Rank = 85.3)
Biostimulatory Risk Scores (shown as quartiles)
Biological index Pathogens Bioassessment Toxicity Biostimulatory risk Riparian characteristics Escherichia coli Enterococcus Coliform, Fecal Coliform, Total Fecal to Total Coliform Ratio
Biological index Riparian condition Bioassessment Toxicity Biostimulatory risk Pathogens Riparian condition Width of corridor Land activities within buffered area Number of patches Species composition Canopy height, etc.
Combining multiple metrics into a single score expressing biological health Toxicity Riparian Health Biological Health Bioassessment Pathogen Indicators Biostimulation
Different scales of data Sites Reaches Watershed This will enable us New USGS data tools will help us attach sites to reaches to watersheds
Riparian Buffering
Reach-scaled data: Riparian delineation
Santa Maria Watershed: An Example of Watershed-scaled data
National Agricultural Inventory Project (1 m aerial imagery)
National Land Cover Database (1992)
Forest Canopy
Impervious Surfaces
Agricultural Areas (and monitoring sites)
Mean Nitrate levels in DHS wells
Pesticide Diversity
Chlorpyrifos applications and Toxicity
Number of New Management Practices Planned in Next 3 Years 1 – 25 practices
N and P crop requirements are known
Nutrient Budget used to determine application rates
What we need to do next Develop a work plan Determine imaging requirements for riparian delineations and impervious surface calculations Secure funding and contract out imaging analysis if needed Potentially redirect staff work to external sources as needed to free up staff time Evaluate staff work to determine what additional tracking activities are needed to support this effort
CCAMP IBI vs Biostimulatory Risk Index
Spot Satellite (5 m)