Economics model of no net loss policy in wetland compensation mechanism

• Main Authors: Han-Yang Cheng, 鄭翰陽
• Other Authors: Hong-yuan Lee
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/85317271538127952196

碩士 === 國立臺灣大學 === 土木工程學研究所 === 104 === Wetland ecosystems, being one of the three main ecosystems, possess multiple ecological values and functions, although they cover less than 6% of all the terrestrial area on Earth. “Wetland Conservation Act,” promulgated in 2012, came in force in 2015, with people of all walks of life anticipating that this Act will retain its legislative intent- “wise use” and “wetland ecological conservation.” Chapter Five in the Act focuses on the vital principles of wetland development avoidance, impact mitigation, ecological compensation, et cetera, except that criteria for further operations and detailed enforcement rules are still far from reaching a consensus due to the intricacies of wetlands. This paper conducts further research on regulations pertaining to “no net loss” concept in “Wetland Conservation Act” by constructing a model based on economic theories. Based on optimization in economic theory and static analysis, it first covers the analysis on utilizing pecuniary or substantial compensation of wetland mitigation through partial equilibrium analysis. It then discusses wetland mitigation coverage under spatial heterogeneity through general equilibrium analysis. As the result indicates, when the number of people influenced by wetland development is extremely large, substantial compensation should be the most suitable method, surpassing pecuniary compensation. Additionally, if “utility” is the only thing considered and “direct environmental value” is omitted during evaluation, the ecological value of a wetland will be underestimated. Finally, when spatial heterogeneity exists in a wetland, supposing the effects of ecological isolation in the mitigation wetland are more than those of the native wetland, the wetland ecological quality will consequently enhanced as its distance with the center of mitigation wetland increases.