https://scholars.lib.ntu.edu.tw/handle/123456789/162012
標題: | 重建工程及其對環境長期影響之評估研究─子計畫:重建工程設計效益與影響之評估─抑制土石流災害效益評估(I) | 作者: | 黃宏斌 | 關鍵字: | 921 地震;二維數值模式;土石流;921 Chi-chi Earthquake;Two-dimensional numerical model;FLO-2D;Debris-flow | 公開日期: | 2005 | 出版社: | 臺北市:國立臺灣大學水工試驗所 | 摘要: | 政府在921 地震發生後,迅速投入大筆經費進行重建區治山防災之工作,不過由於時間緊迫,部分防災工程未經審慎評估規劃即行施工,雖可在第一時間保護民眾避免再次受到災害,但長期看來,實有必要進行重建區治山防災工程之效益評估,檢討工程設計對抑制土石流災害之功能及其安全性。 為檢討重建工程抑制土石流災害之效益,本研究建立研究區域重建工程構造物資料庫,並蒐集921 重建區中基本地文、水文資料,利用二維數值模式FLO-2D,實際模擬土石流之流況,再根據模擬所得之結果,針對集水區整體治理工程對抑制土石流之效果、不同之土石流抑制工法對土石流抑制之效益、不同之抑制工法對當地生態之影響以及土石流抑制工法維護及管理問題等四個面向,進行分析與探討,最後提出一工程構造物抑制土石流災害之效益評估方法,除可檢討當地工程設計之功能及其安全性是否符合原先設計之要求外,並可作為日後土石流防治工程效益評估之參考。 After 921 Chi-chi Earthquake occurred, government spent a lot of money and resources for sediment disaster mitigation in the earthquake area. Because government wish protect the residents from suffering sediment disaster again in the shortest time, some hazard-mitigation structures was built without being assessed carefully. For the sake of long-term safety, they still ought to be evaluated on disaster mitigation effect of debris-flow. In order to evaluate the structures on disaster mitigation effect of debris-flow, this study planned to build the database of the structures, and the geological and hydrological factors in the earthquake disaster area. Then, this study will use the two-dimensional numerical model FLO-2D to simulate the fluid behavior of debris-flow. Base on the results of the simulation, this study will discuss the following four problems: (1) the effect of the hazard-mitigation structures in the selected watershed, (2) the disaster mitigation effect of different kinds of structures, (3) the environmental impact of different kinds of structures, and (4) the management and maintenance problem of the hazard-mitigation structures. Finally, this study will II present a method to evaluate the structures on the debris-flow disaster mitigation effect of debris-flow in the earthquake disaster area, and be an example of evaluation disaster mitigation effect. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/9942 | 其他識別: | 932625Z002019 | Rights: | 國立臺灣大學水工試驗所 |
顯示於: | 生農、工學院附設水工試驗所 |
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932625Z002019.pdf | 797.25 kB | Adobe PDF | 檢視/開啟 |
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