本文關(guān)鍵詞：2010年“8.8”舟曲特大山洪泥石流災(zāi)害形成的氣候特征及地質(zhì)地理環(huán)境分析，，由筆耕文化傳播整理發(fā)布。

2010年“8.8”舟曲特大山洪泥石流災(zāi)害形成的氣候特征及地質(zhì)地理環(huán)境分析

Climatic and Geological Environmental Characteristics of the Exceptional Debris Flow Outburst in Zhouqu,Gansu Province,on 8 August,2010

[1] [2] [3] [4] [5]

ZHANG Zhi-xian1,2,4,ZHANG Qiang1,2,TAO Ji-chun4,SUN Yun5,ZHAO Qing-yun3（1.Gansu Key Laboratory of Arid Climate Change and Reducing Disaster/Key Laboratory of Arid Climate Change an

[1]中國氣象局蘭州干旱氣象研究所/甘肅省干旱氣候變化與減災(zāi)重點(diǎn)實(shí)驗(yàn)室/中國氣象局干旱氣候變化與減災(zāi)重點(diǎn)開放實(shí)驗(yàn)室,甘肅蘭州730020; [2]蘭州大學(xué)大氣科學(xué)學(xué)院,甘肅蘭州730000; [3]蘭州中心氣象臺,甘肅蘭州730020; [4]93808部隊(duì),甘肅榆中730109; [5]蘭州資源環(huán)境職業(yè)技術(shù)學(xué)院,甘肅蘭州730021

文章摘要：利用舟曲氣象和地質(zhì)資料,分析了2010年8月8日發(fā)生的＂8.8＂舟曲特大山洪泥石流災(zāi)害形成的氣候特征和地質(zhì)地理環(huán)境.這次泥石流是在舟曲特殊的地質(zhì)地貌和地理環(huán)境下,由于前期干旱,突遇強(qiáng)降水而發(fā)生的一次特大地質(zhì)災(zāi)害.崩塌、滑坡、地震和人為因素,特別是＂5.12＂汶川地震,較大程度上破壞了舟曲地質(zhì),為泥石流提供了豐富的物質(zhì)來源;前期干旱在一定程度上加劇了這次災(zāi)害;超歷史極值的強(qiáng)降水是觸發(fā)泥石流的直接因素.通過對舟曲氣候研究表明,7、8月降雨頻繁,而且過程雨量大,尤其8月上旬大雨發(fā)生頻率最高,應(yīng)密切關(guān)注可能引發(fā)的地質(zhì)災(zāi)害.加強(qiáng)對地質(zhì)地貌的保護(hù),研究歷史氣候及月季氣候特征對泥石流發(fā)生的影響,確定在不同地形和地質(zhì)地貌背景下的泥石流降水量閾值,對泥石流災(zāi)害發(fā)生的預(yù)報(bào)有著十分重要的意義.

Abstr：In this paper,by using of meteorological and geological data of Zhouqu,the climate and geology characteristics of exceptional debris flow outburst in Zhouqu on 8 August,2010 is analyzed.On the background of Zhouqu special geological features and geographical environment,the pre-drought and the sudden heavy rainfall resulted in the large geological disaster.Collapse,landslide,earthquake and human activity,especially the Wenchuan earthquake on 12 May,2008,have destroyed the Zhouqu geologic environment in a great extent and provided a lot of material for debris flow.In certain extent,the pre-drought would aggravate the disaster;and extreme precipitation,which has not been seen in the history record,is the direct factor of trigger the debris flow.By analyzing the Zhouqu climate data,it is found that rainfall intensity in July and August,particularly in the early August,has the highest frequency,to which should pay special attention.It is of great significance to strengthen the protection of geological environment,to research climate impact on debris flow and to determine the precipitation threshold,which is important for forecasting debris flow.

文章關(guān)鍵詞：

Keyword：:debris flow； geology-geomorphology； climate； heavy rain； multi-factor coupling；

課題項(xiàng)目：國家自然科學(xué)基金重點(diǎn)項(xiàng)目（40830957）; 國家公益性行業(yè)科研專項(xiàng)“西北地區(qū)旱作農(nóng)業(yè)對氣候變暖的響應(yīng)特征及其預(yù)警和應(yīng)對技術(shù)研究”（GYHY200806021）資助

作者信息：會員可見

  本文關(guān)鍵詞：2010年“8.8”舟曲特大山洪泥石流災(zāi)害形成的氣候特征及地質(zhì)地理環(huán)境分析，由筆耕文化傳播整理發(fā)布。