CAJ | 학술논문

2008年汶川大地震引发了岷江流域映秀-茂县段极为严重的地震次生地质灾害。利用震后多期高分辨率航空遥感数据并结合解译标志，快速、准确地分析研究区灾害的分布规律及发展趋势，对科学指导灾后重建具有重要意义。次生地质灾害分布规律主要表现为：①滑坡、崩塌及其过渡类型---崩滑为主要的次生地质灾害类型(占90%以上)；②次生地质灾害广泛分布在岷江两岸山坡，但在映秀-汶川段的发育程度和规模比汶川-茂县段大得多。研究区次生地质灾害发展趋势分析结果表明：①地震形成的滑坡体趋于稳定，但解译的21个潜在滑坡体中部分已出现活动迹象，其中斗簇和沏底关2个潜在滑坡群更为明显，应对其进行遥感连续动态监测；②泥石流为研究区今后最主要的灾害类型，其中映秀-汶川段为最主要的发生地段。
2008년문천대지진인발료민강류역영수-무현단겁위엄중적지진차생지질재해。이용진후다기고분변솔항공요감수거병결합해역표지，쾌속、준학지분석연구구재해적분포규률급발전추세，대과학지도재후중건구유중요의의。차생지질재해분포규률주요표현위：①활파、붕탑급기과도류형---붕활위주요적차생지질재해류형(점90%이상)；②차생지질재해엄범분포재민강량안산파，단재영수-문천단적발육정도화규모비문천-무현단대득다。연구구차생지질재해발전추세분석결과표명：①지진형성적활파체추우은정，단해역적21개잠재활파체중부분이출현활동적상，기중두족화절저관2개잠재활파군경위명현，응대기진행요감련속동태감측；②니석류위연구구금후최주요적재해류형，기중영수-문천단위최주요적발생지단。
The 2008 Wenchuan earthquak led to fatal secondary geological disasters in the Yingxiu - Maoxian segments along the Minjiang River. Through using multi -phase high -resolution airborne remote sensing data obtained after the earthquake in combination with interpretation signs of various geohazards, we can analyze the distribution regularity and development tendency of earthquake secondary geohazards quickly and accurately,which is of great significance in guiding reconstruction of the disaster area scientifically. The distribution regularity of secondary geohazards finds expression in the following aspects: ① avalanche, landslide and landslide-avalanche ( the transition type between the landslide and avalanche ) constitute the main types, with landslide -avalanche taking up over 90%; ② the geohazards are widely distributed on the both slopes of the Minjiang River in the Yingxiu-Maoxian segment,but their scales and intensities are much larger in the Yingxiu-Maoxian segment than in the Wenchuan-Maoxian segment. Through continuous dynamic monitoring of the secondary geohazards after the earthquake by using high-resolution aerial imagery acquired from 2009 to 2011 and in 2013 , the authors have revealed that 25 earthquake -induced landslides have been stable basically, but some potential landslides ( total 21) show evident signs of activity, of which the Doucu potential landslides in Maoxian and Qidiguan potential landslides in Wenchuan deserve more attention. In addition, the debris flow will be the main geohazard type in the Yingxiu-Maoxian segment along the Minjiang River in the future; in the Yingxiu - Wenchuan segment, the frequency and intensity of the debris flow are especially obvious.