平成28年8月北海道激甚災害を踏まえた超過洪水対策

摘要

In August 2016, Hokkaido, the northern island of Japan, experienced three consecutive typhoon landfalls within a week, and suffered tremendous agricultural damage, which in turn contributed to a sharp rise in vegetable prices nationwide. The disaster has been an important reminder that structural measures, as well as non-structural ones, are essential to protect people's assets and farmland from extreme floods. To promote further disaster risk reduction, we have conducted large-scale meteorological ensemble experiments, which provide useful outcomes to study adaptation measures to climate change. In this report, we present the results of rainfall analysis using the data from the experiments and compares different types of flood control measures in effectiveness for damage reduction in case of an extreme flood.%平成28年8月、一週間に3個の台風が北海道に上陸し、全国的に野菜価格が高騰した。超過洪水時においても、資産、農地を守るためには、 ソフト対策とともにハード対策が不可欠である。お候変動への適応策を検討するにあたって有効となる大規模アンサンブル気象実験結果を用 いた降雨の分析結果と治水対策の違いによる超過洪水時の被害軽減効果について報告する。