抄録
Travel cost method is one of the most prevailing approaches to estimate the benefit of natural environment. However, the high survey expense limits its application. What is now required is to develop new survey method which needs less cost. One possibility may be to utilize existing data: for example, data of permit or registration form can be used for estimation. In this paper, we use the latter data to estimate the benefits of Kiritappu wetland located in eastern Hokkaido.
Registration form is one kind of on-site data, but it has some difference since it is composed of the data of whole seasons. Usually, on-site survey is conducted in a certain period of the year, which may cause bias in the estimated benefit, especially when the living place distribution of samples (visitors to the site) is widely different from that of samples collected through the year.
We treated this issue by using registration form. Estimated benefits of the certain period and whole seasons are 1200 million yen and 2024 million yen, respectively. It suggests that estimation using a certain period on-site data may cause bias.
