The Value of Forest Conservation for Water Quality Protection
Abstract
:1. Introduction
2. Conceptual Approach
2.1. Benefits of Forest Conservation
2.2. Valuing Water Quality
2.3. Meta-Analysis and Benefit Transfer Methods
2.3.1. Meta-Analysis Variable Selection
3. Data Collection and Analysis
Study | Observations Per Study a | Conservation Tool | Water Body Type b | Scale | Valuation Methodology | US State | WTP Per-Capita Per-Year c,d |
---|---|---|---|---|---|---|---|
Aiken (1984) [35] | 4 | Not specified | River/stream | Statewide | Iterative bidding and open ended | Colorado | 13.43-31.02 |
Blaine et al. (2003) [25] | 1 | Easement | All water resources | Watershed | Dichotomous choice | Ohio | 11.06 |
Blaine and Smith (2006) [36] | 2 | Easement | River/stream | Watershed | Other | Ohio | 7.59-13.18 |
Blaine and Lichtkoppler (2004) [37] | 1 | Easement | Wetland | Watershed | Dichotomous choice | Ohio | 17.53 |
Carman et al. (1992) [38] | 1 | Acquisition | Wetland/estuary | Watershed | Open ended | Oregon | 2.87 |
Cho et al. (2005) [39] | 2 | Easement | All water resources | Watershed | Dichotomous choice | North Carolina | 4.95-9.85 |
Condon (2007) [41] | 2 | Acquisition and Easement | All water resources | Watershed | Attribute based choice experiment | Florida | 17.07-20.37 |
Cooksey and Theodore (1995) [40] | 1 | Easement | All water resources | Watershed | Other | New Hampshire | 18.60 |
Giraud et al. (2001) [43] | 3 | Not specified | River/stream | Watershed | Dichotomous choice | Colorado | 237.77 |
Greenley et al. (1981) [44] | 5 | Not specified | River/stream | Watershed | Dichotomous choice | Colorado | 8.38-59.34 |
Hanemann et al. (1991) [50] | 2 | Not specified | Wetland/estuary | Watershed | Dichotomous choice | California | 82.32-139.32 |
Mannesto et al. (1991) [45] | 2 | Not specified | Wetland/estuary | Single site | Payment card | California | 29.43-54.24 |
Petrolia (2011) [46] | 2 | Not specified | Wetland/estuary | Watershed | Dichotomous choice | Louisiana | 221.11-266.48 |
Sanders et al. (1990) [32] | 4 | Not specified | River/stream | Watershed | Open ended | Colorado | 14.15-32.08 |
Shrestha and Alavalapati (2004) [28] | 2 | Land owner incentives | Lake | Single site | Other | Florida | 14.84-34.92 |
Sutherland and Walsh (1985) [51] | 4 | Not specified | River/stream | Watershed | Open ended | Montana | 6.05-21.64 |
Whitehead (1990) [47] | 2 | Not specified | Wetland/estuary | Single site | Other | Kentucky | 4.05-8.78 |
Variable Category | Level | Description | Mean (SE) |
---|---|---|---|
Willingness to pay (dependent) | Ln_WTP | Natural log of per-capita willingness-to-pay to maintain or protect water resources, in 2010 US Dollars. | 3.01 (0.710) |
Survey method | CV_OE | 1 if WTP was estimated using an open ended survey instrument; 0 otherwise (e.g., payment card, iterative bidding, dichotomous choice, or attribute based choice experiment). | 0.166 (0.241) |
Year | YR_INDX | Index of year the study was conducted (1970 baseline). | 24.67 (6.080) |
Weighting | RR_COFF | Weighting variable, calculated as response rate divided by sample size. | 0.186 (0.174) |
Median household income | INCOME | Median household income of respondents as reported by the original study or calculated from US Census data (2010 dollars). | 50,605 (5,074) |
Region | SOUTH | 1 if study was conducted in the southern region of the US (Tennessee, North Carolina, South Carolina, Georgia, Alabama, Mississippi, Louisiana and Florida); 0 otherwise. | 0.333 (0.304) |
Resource | RIVER | 1 if protected resource is a river; 0 otherwise. | 0.388 (0.315) |
Scale | WT_SHD | 1 if resource protection is within a watershed; 0 otherwise. | 0.722 (0.289) |
Scale | SGL_SITE | 1 if resource protection at a single site; 0 otherwise. | 0.221 (0.268) |
Program | PRG_AE | 1 if the proposed water quality protection program uses acquisition or easement type strategies implemented by a government agency; 0 otherwise. | 0.389 (0.315) |
3.1. Study Characteristics
3.2. Site Characteristics
3.3. Socio-Economic Characteristics
3.4. Program/Policy Attributes
3.5. Econometric Model and Analysis
Variable Category | Level a | Coefficient (SE) |
---|---|---|
Intercept | Intercept | −0.883 (0.886) |
Survey Method | CV_OE | −0.591 ** (0.220) |
Year | YR_INDX | 0.091 *** (0.012) |
Weighting | RR_COFF | 0.897 ** (0.388) |
Median household income | INCOME | 0.058 *** (0.000) |
Region | SOUTH | −0.414 * (0.259) |
Resource | RIVER | −1.072 *** (0.209) |
Scale | WT_SHD | 0.821 ** (0.340) |
Scale | SGL_SITE | −1.294 *** (0.415) |
Program | PRG_AE | −2.990 *** (0.209) |
Sample size | 43 | |
R2 adjusted | 0.8847 | |
Standard error | 0.246 | |
F-statistic (degrees of freedom) | 28.136 * (9) |
4. Results
4.1. Meta-Analysis
4.2. Benefit Transfer
Policy Site | Resource | Program | Annual Household WTP a | CI (95%) | Population | Total Annual WTP |
---|---|---|---|---|---|---|
Lower Suwannee River Watershed, Florida (US) | Streams and rivers | Acquisition/Easement | $2.29 | ($2.10–$2.50) | 46,000 | $105,340 |
Non-specific program | $43.79 | ($39.98–$47.97) | 46,000 | $2,014,340 | ||
Wetlands, lakes and all water resources | Acquisition/Easement | $6.51 | ($5.95–$7.13) | 46,000 | $299,460 | |
Non-specific program | $127.79 | ($116.65–$139.99) | 46,000 | $5,878,340 | ||
State of Minnesota (US) | Streams and rivers | Acquisition/Easement | $5.08 | ($4.65–$5.56) | 2,121,570 | $10,777,576 |
Non-specific program | $99.31 | ($90.66–$108.79) | 2,121,570 | $210,693,117 | ||
Wetlands, lakes and all water resources | Acquisition/Easement | $14.66 | ($13.39–$16.06) | 2,121,570 | $31,102,216 | |
Non-specific program | $290.00 | ($264.72–$317.70) | 2,121,570 | $615,255,300 |
5. Discussion
5.1. Systematic Variation in Study Variables
5.2. Systematic Variation in Income and Site Variables
5.3. Systematic Variation in Program Variables
5.4. Benefit Transfer
6. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
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Kreye, M.M.; Adams, D.C.; Escobedo, F.J. The Value of Forest Conservation for Water Quality Protection. Forests 2014, 5, 862-884. https://doi.org/10.3390/f5050862
Kreye MM, Adams DC, Escobedo FJ. The Value of Forest Conservation for Water Quality Protection. Forests. 2014; 5(5):862-884. https://doi.org/10.3390/f5050862
Chicago/Turabian StyleKreye, Melissa M., Damian C. Adams, and Francisco J. Escobedo. 2014. "The Value of Forest Conservation for Water Quality Protection" Forests 5, no. 5: 862-884. https://doi.org/10.3390/f5050862
APA StyleKreye, M. M., Adams, D. C., & Escobedo, F. J. (2014). The Value of Forest Conservation for Water Quality Protection. Forests, 5(5), 862-884. https://doi.org/10.3390/f5050862