CAJ | 학술논문

汶川地震导致大量崩塌和滑坡等次生地质灾害，为泥石流发生提供了丰富的物源，强降雨过后，汶川强震区的群发性泥石流出现了高发区。在2008-2010年的三个雨季里，强震区暴发了多处群发性泥石流灾害，龙池所在的龙溪河流域“8·13”群发泥石流灾害就是其中之一。首先对龙池龙溪河流域2010年8月13日暴发的45条泥石流沟进行简单的灾害阐述，其次在调查数据的基础上阐述了群发泥石流的特征：①成因多样，主因为地震和降雨综合的作用；②规模不一，以中小型为主，流体性质多集中为过渡性-粘性；③隐蔽性强，泥石流活动多集中在极小流域，主要为沟谷型泥石流；④泥石流活动集中在断裂带附近；⑤危害方式以冲蚀、淤埋和堵塞河道为主，且具有灾害链作用和叠加-放大作用。最后针对震区群发泥石流的活动特征，提出增强减灾措施的针对性。
문천지진도치대량붕탑화활파등차생지질재해，위니석류발생제공료봉부적물원，강강우과후，문천강진구적군발성니석류출현료고발구。재2008-2010년적삼개우계리，강진구폭발료다처군발성니석류재해，룡지소재적룡계하류역“8·13”군발니석류재해취시기중지일。수선대룡지룡계하류역2010년8월13일폭발적45조니석류구진행간단적재해천술，기차재조사수거적기출상천술료군발니석류적특정：①성인다양，주인위지진화강우종합적작용；②규모불일，이중소형위주，류체성질다집중위과도성-점성；③은폐성강，니석류활동다집중재겁소류역，주요위구곡형니석류；④니석류활동집중재단렬대부근；⑤위해방식이충식、어매화도새하도위주，차구유재해련작용화첩가-방대작용。최후침대진구군발니석류적활동특정，제출증강감재조시적침대성。
The secondary disasters of landslide and collapse in Wenchuan Earthquake provide rich sources for debris flow.The occurrence of group debris flow is frequent in the disaster area during the heavy rainfall after the earthquake.In the rainy seasons of 2008,2009 and 2010,meizoseismal areas have breakout mass of group debris flow disasters.esp.group debris flow hazards in Longchi,Dujiangyan,Sichuan Province is one of these disasters. Based on field investigation and analysis,the disasters of 45 debris flow of Longchi in Longxi river basin disasters were firstly elaborated.Then,the relevant characteristics of group debris flow were studied as:(1 )Various rea-sons,Mainly because of the comprehensive effect of earthquake and rainfall;(2)Different scales,Mostly are small and medium types,Most of debris flows are sub-viscous and viscous debris flows;(3 )Most catchments of debris flow were small catchment and gully debris flow;(4 )Most debris flows are distribution in the triggering belt of Wenchuan Earthquake;(5 )The damageable patterns mainly are erosion,deposition and damming river,have haz-ard chain and stack-amplification effect.Finally,we proposed the strategies for mitigation of group debris flow,in-cluding regular monitoring and warning system.