宜蘭縣大忠村一號崩塌地之土砂災害風險評估與調適策略

Risk Assessment and Adaptation Strategies for Dazhong Village Landslide No.1 in Yilan County, Taiwan

蕭震洋(Cheng-Yang Hsiao) ； 林伯勳(Bor-Shiun Lin) ； 賴承農(Cheng-Nung Lai) ； 吳佳威(Chia-Wei Wu) ； 白朝金(Chao-Chin Pai) ； 吳俊毅(Chun-Yi Wu) ； 馮正一(Zheng-Yi Feng)

《中華水土保持學報》 49卷3期 (2018/09) Pp. 131-141

https://doi.org/10.29417/JCSWC.201809_49(3).0001

摘要

大規模崩塌之重力土砂堆積，恐引發土石流或堰塞湖等複合型災害，倘若影響範圍內有重要建物，或惟一聯外道路或橋梁等交通設施，則可能造成重大災害事件或造成孤島。本文假設不同發生情境，對宜蘭縣大忠村一號崩塌地進行風險等級評估，並提出能降低災害發生可能性、縮減影響範圍及增加疏散避難時間之工程調適策略，且以長期監測成果提出注意、警戒及疏散等監測管理值。最後，重新評估疏散避難處所需求性及提出建議地點。

關鍵字

大規模崩塌 ； 風險評估 ； 調適策略

並列摘要

Excess sediment yield during landslide events and annually has led to an increase in landslides, debris flows, and barrier lake disasters. Therefore, economic losses caused by sediment-related disasters damaging houses, schools, hospitals, roads, and other infrastructure have increased considerably. This study used Dazhong Village Landslide No.1 in Yilan County, Taiwan, as an example of a large-scale landslide area to develop risk assessment and adaptation strategies for 50-year and 200-year return period rainfall conditions. This information can be incorporated into local and national decision-making for emergency and evacuation planning in future landslide events.

並列關鍵字

Large-scale landslide ； risk assessment ； adaptation strategy