CAJ | 학술논문

为了研究高烈度地震区公路走廊带地形条件震时对地质灾害的影响机理，找出路域地质灾害的主要地形成灾因子。以汶川地震汶川—理县灾区为研究区域，应用考虑特征值和贡献率的主成分分析理论，基于地理信息系统技术平台，选取地面高程、地表坡度、地表起伏度、地表粗糙度进行地质灾害成灾因子的主成分分析，并对各指标进行敏感性分析，确定了路域地形条件的主要成灾因子。分析结果表明：地表坡度和地面高程是汶川—理县地区地质灾害的主要地形成灾因子，其累积贡献率达到98．165％，第1主成分中地表坡度、地表起伏度和地表粗糙度主成分荷载为0．987，0．981和0．990，第2主成分中高程和地表坡度主成分荷载为0．987和0．089，以地表坡度的影响尤为突出。
위료연구고열도지진구공로주랑대지형조건진시대지질재해적영향궤리，조출로역지질재해적주요지형성재인자。이문천지진문천—리현재구위연구구역，응용고필특정치화공헌솔적주성분분석이론，기우지리신식계통기술평태，선취지면고정、지표파도、지표기복도、지표조조도진행지질재해성재인자적주성분분석，병대각지표진행민감성분석，학정료로역지형조건적주요성재인자。분석결과표명：지표파도화지면고정시문천—리현지구지질재해적주요지형성재인자，기루적공헌솔체도98．165％，제1주성분중지표파도、지표기복도화지표조조도주성분하재위0．987，0．981화0．990，제2주성분중고정화지표파도주성분하재위0．987화0．089，이지표파도적영향우위돌출。
In order to investigate the impact mechanism of terrain condition on geological disasters in high seis-mic intensity canyon region and find out the salient factor,Wenchuan -Lixian area was used as the study area. By applying the principal component analysis theory which consideres the characteristic value and the contribu-tion rate,using geographic information system as the technology platform,and adopting ground elevation,surface slope,surface waviness and roughness as the main factors,the principal component analysis was conducted.Mo-reover,sensitivity analysis was conducted to determine the main road area terrain conditions disaster factor.The results indicates that the surface slope and ground elevation are the key disaster factors to cause the geological disasters in Wenchuan -Lixian area,cumulative contribution rate is 98.165%,surface slope,principal com-ponent loading of surface waviness and surface roughness in the first principal component are 0.987,0.981, 0.990,principal component loading of ground elevation,surface slope in the second principal component are 0.987 and 0.089,and the influence of surface slope is particularly prominent.