gis and evaluating ecosystem services jim quinn information center for the environment ucdavis...
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GIS and evaluating ecosystem services
Jim QuinnInformation Center for the Environment
Economic Outputs of Sustainably Managed Ecosystems
• Marketed goods– Food and fiber– Recreational opportunities– Water– Coming – Carbon Sequestration
Economic Outputs of Sustainably Managed Ecosystems
• Costs avoided– Health impacts of air and water pollution– Fire– Flooding
• Non-market values– Wildlife– Stewardship values, etc.
Big money
• New York City– $4.5 billion in water treatment avoided
• Millennium Assessment – Hundreds of billions of savings to cities in
water supply and water quality alone
• Just because large amounts of money are hard to measure doesn’t mean they should be ignored
Charge to land use agencies, planners, and NGOs
• A land use plan that provides an effective portfolio of production and ecosystem values
• Institutional framework so beneficiaries reimburse providers
What do we know pretty well?
• Land use and land cover
• Drinking water quality
• Watershed management projects
Habitat TypesElkhorn Slough Watershed
Drinking Water Sources for Public Water Systems* in California
Statewide Assessment ResultsGroundwater Sources
Watershed Protection Natural Resources Project Inventory
Where do we need better information?
• Non-point-source threats– (e.g. nutrients and pathogens from septic
systems)
• Groundwater recharge zones
• Water delivery and pricing
What can we model?
• Future land use
• Watershed exports
• Economic performance of competing land use scenarios (as in the Blueprint process)?
Future Land UseSJ Valley Growth Scenarios (UPlan)
• Many Different types:– Compact– Species Protection– Ag. Protection– Urban Cores– Economic
Development
Digital Elevation Model10 meter resolution
Riparian Corridor Delineation200 meter radius from streams1996 Aerial Photographs
Hourly Solar Incidence for Critical Date: July 22
Vegetation DistributionConverted to Height by DBH Class& Percent Hardwood / Conifer
Reach Averaged Values attributed to linear hydrographic network for Current Conditions & Potential Conditions
Restoring Impaired WaterwaysRiparian-Topographic Shading Model
RipTopo & Aquatic Conservation
RipTopo Riparian Corridor
CurrentShadingConditions
PotentialShadingConditions
RipTopo Model Results