水土保持研究
水土保持研究
수토보지연구
RESEARCH OF SOIL AND WATER CONSERVATION
2001年
1期
2-6
,共5页
活动断层%浅层地震%土壤液化%土石流%地滑
活動斷層%淺層地震%土壤液化%土石流%地滑
활동단층%천층지진%토양액화%토석류%지활
台湾因受板块挤压,以致岩石破碎、地质脆弱且坡度陡峻、表层岩层土砂堆积不易稳定,顺向崩积层及断层带等地质不佳因素,加以地震频仍,山崩、地滑、土石流等灾害不断。1999年9月21日凌晨1时47分12.6秒,以集集地区为震央,发生芮氏震度规模为7.3级之台湾百年大地震,天灾地裂,天摇地动,山河变貌,残垣断壁,死逾2 000人,伤逾万人,房屋倾倒者近2万栋,造成严重灾害。虽然地质骤然大规模断层滑动无法预知,此即大自然存在之不确定,但可确定者为调查断层之确实位置及撤离断层,或为可能减少灾难之方法。灾害防治之基本原则为预防、避开、缓冲、替代、限制、监测、维护等,亦即防灾减灾之基本方法,注动其原则与方法,即可使灾害减轻至最少。
檯灣因受闆塊擠壓,以緻巖石破碎、地質脆弱且坡度陡峻、錶層巖層土砂堆積不易穩定,順嚮崩積層及斷層帶等地質不佳因素,加以地震頻仍,山崩、地滑、土石流等災害不斷。1999年9月21日凌晨1時47分12.6秒,以集集地區為震央,髮生芮氏震度規模為7.3級之檯灣百年大地震,天災地裂,天搖地動,山河變貌,殘垣斷壁,死逾2 000人,傷逾萬人,房屋傾倒者近2萬棟,造成嚴重災害。雖然地質驟然大規模斷層滑動無法預知,此即大自然存在之不確定,但可確定者為調查斷層之確實位置及撤離斷層,或為可能減少災難之方法。災害防治之基本原則為預防、避開、緩遲、替代、限製、鑑測、維護等,亦即防災減災之基本方法,註動其原則與方法,即可使災害減輕至最少。
태만인수판괴제압,이치암석파쇄、지질취약차파도두준、표층암층토사퇴적불역은정,순향붕적층급단층대등지질불가인소,가이지진빈잉,산붕、지활、토석류등재해불단。1999년9월21일릉신1시47분12.6초,이집집지구위진앙,발생예씨진도규모위7.3급지태만백년대지진,천재지렬,천요지동,산하변모,잔원단벽,사유2 000인,상유만인,방옥경도자근2만동,조성엄중재해。수연지질취연대규모단층활동무법예지,차즉대자연존재지불학정,단가학정자위조사단층지학실위치급철리단층,혹위가능감소재난지방법。재해방치지기본원칙위예방、피개、완충、체대、한제、감측、유호등,역즉방재감재지기본방법,주동기원칙여방법,즉가사재해감경지최소。
Situated in a region of active ground plate activities, Taiwan sits on a host of punishing geographical factors, ranging from fragmented rock formation, fragile geography interlaced with steep slopes, unstable surface rock formation and soil/sand deposits, peripheral drops and fault zones, resulting in the constant threats of earthquakes, landfall, landslide, mudslide.The millennial quake disaster, recorded at 7.3 on the open-ended Richter Scale, struck at 1:47AM, September 21, 1999, with the epicenter in the central Chi-Chi area, shattered the earth in violent shakes, eradicating everything in sight over an expansive radius, distorting the face of the earth, disrupting the course of many rivers along the way. The unprecedented casualty ran high at a staggering 2 000 in death toll and tens of thousand injured to various degrees, left many homeless as nearly 20 000 houses were flattened.Despite that there is no way of foretelling when a large-scale of disruption to the ground plates is going to happen, the uncertainty that all of us have to live with under the power of the nature, what can be certain is that by diligent surveying of the precise locations and effective evacuation from potential fault zones are ways to minimize the damages and losses when and if should disasters hit.The paragon behind disaster prevention lies in prevention, evacuation, distance, substitution, restriction, monitoring and maintenance among related measures, which are the essential means of disaster prevention and minimization, and a smart maneuver of the right groundwork and methods can effectively reduce the impacts of disasters to a minimum sustainable level.