姉川・高時川流域における地域間連携を考慮した広域避難に関する考察

Abstract

滋賀県湖北地区に位置する姉川・高時川流域においては，地形の影響で豪雨時の氾濫流が大きく河川改修のみでは守りきれないと想定される場所があり，水害時の避難計画が重要な検討課題となっている．特に合流点に位置する虎姫町においては，町内のほとんどの避難所が浸水する可能性を持っており，住民の安全な避難先を確保するためには広域連携が不可欠となる．本研究では，地域間の連携を考慮した広域避難を想定し研究を行うものとする．特に地域間連携を考慮した広域避難の可能性について検討することを目的とする．

Ane and Takatoki River basin which is located in northern area of Lake Biwa in Shiga prefecture is designated as "flood forecast rivers" by the prefecture's government, which is considered a river that can cause serious floods and damage to the area. They suppose that it would be impossible to prevent it from flooding only by the mitigation because of the character of the area. That is why the flood evacuation plan is now an important issue. In particular, Torahime town, which has the junction of the two rivers, is especially at higher risk of flooding than other places in the target area. There is a possibility that almost all the shelters are flooded. In this research, we study flood evacuation plan for all of Torahime town residents beyond Torahime town border.