水質浄化事業による環境改善便益の計測

抄録

The environment value is divided into several values; use value (UV), option value (OV), vicarious value (VV), bequest value (BV), existence value (EV) and ecosystem value (EcoV). This study tried to measure the environmental improvement benefits by the water purification project at the ISE-Bay Area, which is a prominent bay in Japan. By using the contingent valuation method (CVM) and the zone travel cost method (ZTCM), all environment values improved by the project were measured, and difference between results of two methods were examined. The CVM results indicated that the benefits is 59. 9 [billion yen a pear], where UV/OV/VV/BV/EV/Eco V are 9. 5/9. 4/8. 7/10. 2/10. 4/11.7 [billion yen a pear] respectively. The ZTCM results indicate that the benefits is 41. 6 [billion yena pear], which includes UV only and is about four times of UV evaluated by the CVM.