1 0 0 0 OA 1998年4月1日から2日にかけて長野県中部で発生した雨氷
1 0 0 0 OA 1991年3月23日長野県中部で発生した雨氷現象の特徴
1991年3月23日未明,長野県中部の山岳地帯で発生した雨氷現象について,発生時間中の移動調査や直後に実施した聞き取り調査などによって,発生の状況を詳しく調べた.今回の雨氷現象は,長野県中部の山脈の北側斜面のほぼ標高1200〜1800mの範囲内で確認できた.総観規模の気象データでは,雨氷発生の条件とされる0℃前後の気温逆転層は確認できなかったが,発生地付近の地上気温データからは,現象発生時に標高2000m付近に暖気が入ってできた0℃前後の気温逆転層が解析された.しかし,同時間帯に山脈の南側斜面では気温逆転は見られず,山脈の存在が現象発生に影響を及ほすものと考えられた.雨氷発生域内では,発生中の気温変化がほとんど無く,ほぼ0〜-1℃の範囲で安定していた.雨氷発生中の降水量は1〜3mm/hと少なく,このため森林等への被害には至らなかった.
1 0 0 0 OA 課題探索型地域防災ワークショップの試行
Community based workshop for disaster prevention has been held actively in recent Japan. However, there are not few uniformity workshops. We have applied a trial-and-error method about the workshop based on knowledge of natural disaster science. In this study, I would like to explain the method of workshop. First of all, a preliminary survey about primary cause of natural disaster is important. Various sources of disaster information are already released. For example, hazard map, landform classification map, estimation of damage, local plan for disaster prevention. A facilitator gives participant concrete explanation about the disaster of that area based on this preliminary survey. Next, participants read landform (altitude) of the area by detailed map. Moreover, participants discuss about problems of the area with engineer or public official. A result of discussion summarized in a problems list and a location map. There is an example to which residents started solution of the problems after a workshop. However, the effect of workshop has not been shown clearly yet. Effect verification of workshop is future subject.