手賀沼水害危険地域の変遷と市街地構造による対策の検討
キーワード:
flood risk transition,
digitizing data,
numerical simulation,
urban contexture Lake Tega,
roads
2008 年 14 巻 p. 217-222
詳細
2008 年 14 巻 p. 217-222
In this study, the transition of flood inundation characteristics around Lake Tega was analyzed by numerical simulations using the data which were constructed by digitizing the old maps. Then, the flood countermeasures considering the urban contexture were discussed.
It was shown clearly that flood water depth was polarized resulting from land-use changes around the lake. Therefore, any urban flood measures should take this change into consideration. In this work, we propose to use roads and buildings to control flood waters. Numerical experiments indicated that inundation depths could be reduced and the arrival of flood waters could be delayed by using those structural measures.
