平成23年7月新潟・福島豪雨を教訓とした五十嵐川等における今後の治水対策

抄録

This time, the damage in the section (downstream Ikarashigawa, Kariyatagawa) of river improvement after heavy rain in July 2004 was small. But, in the upstream and tributaries, Dike breaks and Overtoppings has occurred. From a damaged situation like this, analyzed the mechanism of disaster, and verified the flood control measures which were conducted after July 2004. Examined the disaster rehabilitation policy at ikarasikawa-river.kakuma-river and siotani-river. This time, rainfall was more than the scale of the plan. As a countermeasure to excess flood, were studied hard measures and soft measures.