Abstract
The tidal flat where the ecological system is fostered will be destroyed gradually by global warming, and fishes and plants that inhabit there will be thrust into crisis of extinction with rapid speeds. This study aims to supply the basic unit of economic evaluation of tidal flat preservation as a countermeasure against global warming, and measures economic value of tidal flat in each prefecture by using the CVM (contingent valuation method) and the TCM (travel cost method). The result indicates that the environmental economic value of tidal flat is measured by using the CVM as 1, 599 yen/year/person (39, 976 yen/person) and that the total value is 2043 billion yen/year (5, 106.6 billion yen). Secondly, the recreational value of tidal flat (ebb tide hunting) is measured by using the TCM as 2, 099 yen/visit, and the total value is 4.7 billion yen/year (117.5 billion yen). Finally, the basic unit of economic evaluation of tidal flat is derived as 10, 163 yen/m2.
