頭坑溪之土石流扇狀地歷史災害探討及風險性評估

蔡念浯

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頭坑溪之土石流扇狀地歷史災害探討及風險性評估

Disaster Exploration and Risk Assessment of Debris Flow at Toukeng Creek

蔡念浯 , Masters　　Advisor：林基源　　

繁體中文

堆積長度；重現期距； FLO-2D ； deposition length ； recurrence interval ； FLO-2D

Abstract │ Reference (36) │ Times Cited (2) │ Altmetrics

Abstract 〈TOP〉

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In this study, a FLO-2D numerical model analysis was utilized with hydaulic data and DTM (Digital Terranin Modle) to simulate the debris-flow conditions. This simulation also took the flow velocities, flow depth and depostition area into consideration. Accumulated depisited volume in deposition zone is closed to the estemated numbers presented.

This study was conducted in two different approachs. First part of the study is to sumulate the situations with FLO-2D. Results from the preliminary simulations were ultilized according to Swiss Hazardous Degree Classification in the further simulations which were conducted in the return period of 10-year, 100-year, 500-year and the return-period-combinations. Influential intensity of Debris-flow was classified into three categories, and the results were mapped as dangerous zone distribution.

The second part of this study is to use the Deposition Length Demarcation Empiric Formular derived by Ikeya to demarcate the danger classification distirbution map. It is over concervertive to apply Ikeya’s formular to Touken Creek therefore, a safety factor of 1.5 was taken in claculation. The ultimate goal of this study is to put up a map with risk assessment with entire return periods, so that can be the reference for the debris-flow prevention for the residents and government.

Reference ( 36 ) 〈TOP〉

4. 游繁結(1991)，土石流堆積特性之初步探討，中華水土保持學報，22(2)，pp.1~20。
連結：
6. 游繁結(1993)，土石流堆積特性之初步探討Ⅲ，中華水土保持學報，24(1)，pp.45~53。
連結：
7. 游繁結、連惠邦(1999)，土石流扇狀地危險區劃定之評述，地工技術，第74期，pp.67~80。
連結：
12. 張東炯、謝正倫(1998)，「中部地區土石流現場調查與分析」，高苑學報，第7卷，第1期，第225~240頁，1998。
連結：
15. 林炳森、林基源、洪瑞智(2000)，「土石流危險度分級之研究—以陳有蘭溪為例」，朝陽學報，第7期，第165~181頁。
連結：

Times Cited (2) 〈TOP〉

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