Study on the disaster in west Japan due to heavy rain around seasonal rain front, at June 29 1999

1999 年 6 月 29 日日本西部因季雨锋附近暴雨灾害研究

基本信息

批准号：
11800010
负责人：
FUKUOKA Shoji
金额：
--
依托单位：
Hiroshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research on Priority Areas (B).
财政年份：
1999
资助国家：
日本
起止时间：
1999 至无数据
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11800010/
关键词：
Cold front Hiroshima disaster slope failure debris flow radar rain gauge hazard map underground establishment inundation damage ハザードマップ

项目摘要

1. Research report on Hiroshima disaster due to the torrential downpour :The main cause of the Hiroshima disaster is that the heavy rain due to the cold front continued for 2 or 3 hours at the Masa soil belts. This heavy rain appeared in the band with small width. It was considered that this concentration of rainfall was under the influence of the mountainous geographical features. A radar rain gauge was effective for tracing the movement of the heavy rain. The danger of the disaster can be predicted by analyzing the amount of the ground water from precipitation.Geology structure, geographical features and formation of micro seating are given as a cause of disaster except for rain. The mud-flow with the driftwood, which didn't contain large rocks, brought. The debris flow can be expressed by Egashira's model. The hazard maps and the effects on countermeasures can be examined by using this models.The inhabitants don't run away only with the advanced information such as a rainfall. The i … More nhabitants run away by the confirmation of the mud water and the slope collapse, and the refuge advice. Therefore, it becomes important for reducing the sudden disasters that information is transmitted precisely and quickly when the disaster occurs and the consciousness for disaster prevention of inhabitants is raised.2. Research report on the urban flood damage in Fukuoka CityThe heavy rain in north area of Kyushu is due to rain band around the cold front. The water level of the Mikasa River was raised due to the high tide of Hakata bay and a heavy rain, and the Mikasa River overflowed. The damage due to inundation occurred around JR Hakata station whose ground was low. Flooding water got into the underground space around JR Hakata station. The late person who ran away died. It is effective in prevention of an overflowing water invasion underground to use the sand bugs and raise an entrance more than the passage side. The transmission of the the command system are necessary for the precise information.The cause of this disaster was that the high tide of Hakata bay occurred at the same time for a heavy rain and the amount of discharge increased due to the urbanization. The establishment to prevent an overflowing water invasion, the information transmission to underground, the disaster consciousness improvement are necessary except for river improvements to reduce the new urban flood damage. Less

1、广岛暴雨灾害研究报告：广岛灾害的主要原因是冷锋带来的大雨在马萨土带持续了2、3个小时。认为这种降雨集中是受山区地理特征的影响，雷达雨量计可以有效地追踪暴雨的移动情况，通过分析暴雨的量可以预测灾害的危险性。地下水来自地质结构、地理特征和微座的形成是除了降雨以外的灾害原因，其中不含大岩石的泥石流可以用Egashira模型来表达。使用该模型可以检查灾害地图和对策效果。居民不会仅仅依靠降雨等先进信息而逃跑。居民是通过确认泥水和坡度来逃跑的。崩溃和避难所因此，灾害发生时准确、快速地传递信息，提高居民的防灾意识，对于减少突发灾害显得尤为重要。2．九州地区由于冷锋周围的雨带，因博多湾涨潮和大雨导致三笠川水位上升，三笠川周边发生了泛滥灾害。 JR博多站的地面较低，洪水进入了JR博多站周围的地下空间，使用沙虫并提高入口可以有效防止溢出的水侵入地下。指挥系统的传输对于准确的信息是必要的。这次灾难的原因是博多湾在大雨的同时发生了涨潮，并且由于城市化导致排放量增加。设立以防止除河道整治外，还需通过溢水入侵、向地下传递信息、提高防灾意识来减少新城市的洪涝灾害。