享受天然資源的好處時,也要思考隨之而來的風險。讓我們一起學習如何面對災害,與災害共存!
 
地質敏感區
2010年通過地質法,經濟部據其劃定地質遺跡、地下水補注、活動斷層、山崩與地滑、其它等5類地質敏感區。目前宜蘭縣已公告3類地質敏感區:地質遺跡(H0010龜山島火山碎屑堆積層)、山崩與地滑(L0016宜蘭縣) 、地下水補注(G0003宜蘭平原)。
臺灣東部海域因菲律賓海板塊與歐亞大陸板塊擠壓碰撞,地震頻繁,宜蘭的南澳常是地震震央所在,地震也可能引起土壤液化與山崩地滑等地質災害。
 
土壤液化
土壤液化是城鄉發展災害預防的重要項目,宜蘭土壤液化高潛勢區面積,占全縣面積15.45%,主因是地下水位高的泥質地區,在地震發生時,容易產生土壤液化現象。
 
山崩與土石流
臺灣山地面積占全島面積的2/3以上,在颱風、豪雨與地震等因素誘發下,山崩不斷。
現代山崩調查強調預警及防災機能,作為防災工作依據。
2010年梅姬颱風帶來大量降雨,引起大規模土石流及淹水。
 
 
Living with Crisis in the Future
 
There are inherent risks that come with the use and enjoyment of natural resources. Let’s learn how to face natural disasters and coexist with them.
 
Geologically Sensitive Areas

After Taiwan passed the Geology Act in 2010, and the Ministry of Economic Affairs categorized the geologically sensitive areas into five categories: geologic remains, groundwater recharge areas, active faults, landslide and landslip areas, and other sensitive areas. To this day, Yilan county has announced locations that fall into the three categories: geologic remains (H0010 Guishan Island Volcanic Debris Layers), landslide and landslip areas (L0016 Yilan County), and groundwater recharge areas (G0003 Yilan Plain).

In the offshore east of Taiwan, earthquakes are frequent due to the convergence and collision of the Eurasian Plate and the Philippine Sea Plate. The earthquake epicenter often occurs in Nan’ao, Yilan, and an earthquake can cause geological hazards such as soil liquefaction, landslides, and landslips.

 
Soil liquefaction

Soil liquefaction is an important issue concerning urban and rural development and disaster prevention. Soil liquefaction-induced disasters include the tilting/collapse of built structures, cracking of land, land subsidence, etc. Underground pipes might be forced to the surface and burst due to liquefaction as well. Areas with high soil liquefaction potential in Yilan have, accounting for 15.45% of the whole county. The primary reason for such a high number is that muddy areas with a high groundwater level are prone to liquefication when an earthquake strikes.

 
Landslide and Debris Flow

Modern landslide monitoring systems emphasize early warnings and disaster prevention. Methods such as aerial photographs, remote sensing images, field investigation, rock core drilling, etc. are used to determine the potential landslide areas and to support disaster prevention efforts.
In 2010, Typhoon Megi, though not making landfall in Su'ao, brought heavy rainfall that once again triggered large-scale landslides and floods, causing catastrophic damage in the affected region.