ECONOMIC EVALUATION OF BEACH EROSION DUE TO CLIMATE CHANGE AND SOCIOECONOMIC CHANGE

Abstract

 To measure economic effects of climate change and socioeconomic change, we estimate the loss of recreation value for sandy beach due to future beach erosion and population change and evaluate the economic effectiveness of hypothetical adaptation measures to restore sandy beach. The main findings of our study are presented as follows. (1) Damage costs due to climate change and socioeconomic change in 2081-2100 were estimated respectively as 257.7 billion yen/year for SSP1-2.6, 290.0 billion yen/year for SSP2-4.5, and 267.8 billion yen/year for SSP5-8.5. (2) For all combinations of RCP scenarios and SSP scenarios, adaptation measures were economically efficient in 31 to 35 prefectures, while they are inefficient in 6 prefectures (Hokkaido, Aomori, Tokushima, Kochi, Miyazaki, and Kagoshima).