ESValue-SWF. Valuing Ecosystem Services on Public Lands in Southwest Florida. Jay Yingling, SWFWMD and Rush Childs, Cardno ENTRIX

Transcription

1 ESValue-SWF C Valuing Ecosystem Services on Public Lands in Southwest Florida Jay Yingling, SWFWMD and Rush Childs, Cardno ENTRIX

2 PROJECT MOTIVATION Demonstrate high value use of public funds including recreation value Aggregate value nature of WTP studies unsuitable for analysis of multiple specific parcels Quantify the ecosystem function costs of land use conversion Identify land for potential surplus Identify targets for acquisition Image Credit: Southwest Florida Water Management District

3 SOUTHWEST FLORIDA WMD Includes all or part of 16 counties Tampa, Lakeland Population of about 5 million Area is approximately 10,000 mi 2 District owns about 430,000 acres Role - 4 Core Mission Areas: Water Supply Water Quality Flood Control Natural Systems

4 PROJECT SCOPE Develop a valuation framework for the Ecosystem Services provided by District land: Use available GIS data and studies Available Data Develop screening-level estimate of value Scenarios Consider baseline and alternative land uses Screening-level Value Estimate Develop estimates according to four mission areas

5 PROJECT CHALLENGES Skepticism of non-economists about benefits transfer and contingent valuation Incorporation of mitigative effects of regulatory programs on loss of ecosystem functions from land conversion Acceptance of screening level models by technical experts Estimation of natural systems values (e.g., species richness, connectivity) without double counting other core mission values Inconsistent collection of recreation visitation data

6 ESVALUE-SWF Phase I - Desktop screening tool: Available GIS data Hydrologic/economic spreadsheet model development Potential economic benefits of a given parcel Phase II: Recreation Revenue-producing services Phase III: Case study application (parcels TBD)

7 POTENTIAL USES OF ESVALUE-SWF Compare parcels by value of ecosystem services Strategic approach to core missions Valuation of non-core mission use (recreation) Communication and outreach Demonstrates the public costs of replacing ecosystem services with and without regulatory regimes Public costs avoided by land protection

8 ESVALUE-SWF BASIC FRAMEWORK Property value is a composite good Group 1 Core Mission Group 2 Human Use Land Values Group 3 Revenue Producing Group 4 Economic Impact Water Supply Group 1 Core Mission Water Quality Flood Protection Natural Systems Group 4 Economic Impact Jobs Output Taxes (Indirect) Recreation Group 2 Human Use Special Events Hunting Group 3 Revenue Producing Timber Cattle Leases Tax Revenue Direct

9 ECOSYSTEM SERVICES VALUATION APPROACH Ecological structure and function Identify land uses and ecosystem types Soil type Recharge Nutrient cycling Water storage Geographic attributes Proximity to receiving waters Adjacent land uses Baseline level of services and benefit provided Land conversion scenarios 1) None 2) Agriculture 3) Residential Change in service and value with and without District regulations

10 AVAILABLE DATA AND TOOLS Basic GIS/Site Data: Florida Natural Areas Inventory (FNAI) Soil type Slope FNAI Critical Lands and Waters Identification Project (CLIP 2.0): Species richness Ecological greenway network Groundwater recharge Other readily available data SWFWMD Water Supply Plans Literature (e.g. NRCS TR-55)

11 QUANTITY PRODUCTION FUNCTION Applied to 3 of 4 core mission areas Water supply Water Quality Flood Control NRCS Curve Number method to compute rainfall excess and potential runoff Values are referenced from GIS data Different ecosystems (FNAI land use types) generate different Qs Water Quality changes in nutrient concentration and mass load Water Supply changes in infiltration and recharge Flood control changes in 100 year flood runoff

12 PRICE ECONOMIC VALUE FUNCTION Replacement cost or avoided cost Replace baseline value with structural/engineered solution Water quality stormwater BMP costs Water supply replacement costs for water supply development Flood control replacement costs of storage

13 EXAMPLE OF PRODUCTION FUNCTION APPROACH: WATER SUPPLY District Water Supply Planning Region No Regulation = Replacement cost of lost recharge Recharge rate (inches per year) Acreage of District FNAI land type Current regional groundwater supply from site Land conversion: None Residential Agriculture Change in recharge, onsite hydrology (groundwater vs. surface water) With regulation = Replacement costs of lost recharge varies depending on stormwater system Hydrologic soil group BMP infiltration factor

14 NATURAL SYSTEMS Non-priced services Biodiversity Unique natural communities Landscape connectivity

15 How can we develop prices for these? Images. 1.) National Forest Foundation. "Longleaf Pine Forest." 2.) Southwest Florida Water Management District; 3.) Summit County Citizen s Voice. A Young Alligator floats in the Myakka river estuary in southwest Florida.

16 NEXT STEPS Case study application Refine models Model documentation Multi-polygon interface Revise product and deliver to the client