公園整備を考慮した遊水地の便益評価に関する研究

抄録

The purpose of this study is to attempt benefit evaluation for flood control basin in the sight of park-use. Based on catchment shape factor, 60 rivers in Japan are extracted, in which flood control basin is more cost-benefit effective than river banks. The latter part of this study attempts to create benefit evaluation model for flood control basin. First, two sites for flood control basin are assumed in Rokkakugawa and Nakagawa to analyze their benefit for park with an existing method. Reflecting the result a simple model which requires only population data is created.

Using the model we calculated the benefit of all 60 rivers as park and it totaled 1859 billion yen. This result demonstrates great investigation potentials for flood control basin.