2003年台風10号による北海道日高地方厚別川の氾濫解析

抄録

On August, 2003, a Typhoon no.10 struck Hidaka area by a record rainfall and river overflow. This time killing 10 persons, missing 1 person, injuring 3 persons, demolishing 16 homes, half-demolished and partially destroying 8 homes, flooded above-under floor 522 homes and refugee 7245 persons. By this flood, to consider about the flood countermeasure of Atsubetsu River basin is very important in river engineering, and it is quite important for this area. Then, the study of the structure of the complex flow in the meanderings section and the confluence section of the river will be important in flood countermeasure. It aims at appreciating an overflow mechanism in the meanderings section and the confluence section of the river as a first step by this research.

First, field investigations have done, check on damage conditions are confirmed, and estimate the flood conditions. Next, a two-dimensional calculation is performed to reproduce and find out the characteristics of the flood.