摘要
海城市地貌类型多样,地质灾害多发.本文选取高程、坡度、坡向、地层岩性、年均降雨量、距河流距离、植被覆盖度和距断层距离8个影响因子进行地质灾害易发性评价,基于ArcGIS栅格统计功能,运用确定性系数模型对海城市地质灾害易发性进行评价.结果表明:海城市地质灾害可分为高、中、低和不易发区,高易发区主要分布在海城市东南部低山丘陵地区;中易发区集中分布在高易发区外围的析木镇、牌楼镇和岔沟镇;低易发区零星分散于海城市各镇;不易发区主要分布在北部地形平缓的平原区.海城市地质灾害的发生受高程和地层岩性影响因子主要控制,经降雨诱发,受河流附近人为活动影响,并在坡度、坡向、植被覆盖度和距断层距离等多种因素影响下,导致海城市地质灾害发育程度和分区的不同.
The geomorphologic types are diverse and geological disasters are frequent in Haicheng City.This paper selects eight factors to evaluate the susceptibility of geological disasters:elevation,slope,aspect,formation lithology,average annual rainfall,distance from rivers,normalized differential vegetation index and distance from faults.Based on the ArcGIS grid statistical function,the certainty factor model is used to evaluate the susceptibility of geological disasters in Haicheng City.The results show that geological disasters in Haicheng City can be divided into high,medium,low and non prone areas,high prone areas are mainly distributed in low mountains and hills of southeast Haicheng City;medium prone areas are concentrated in Ximu,Pailou and Chagou Town along the high risk periphery;low prone areas are scattered in each town of Haicheng City;non‐prone areas are mainly distributed in the plain area with flat terrain in the north.Geological disaster development in Haicheng City is mainly controlled by the influence factors of elevation and formation lithology,induced by rainfall,and affected by human activities near the river.And the development degree and distributions of geological disasters in Haicheng City are different,which mainly caused by the action of multiple factors such as slope,aspect,normalized differential vegetation index and distance from faults.
作者
李剑锋
芦艳丽
邹治亮
LI Jianfeng;LU Yanli;ZOU Zhiliang(College of Geographic Science,Liaoning Normal University,Dalian Liaoning 116029;Wuhan Center of Geological Survey,China Geological Survey,Wuhan Hubei 430074;Hydrogeological and Engineering Geological Survey Institute of Liaoning Province,Dalian Liaoning 116037)
出处
《首都师范大学学报（自然科学版）》
2021年第4期62-68,共7页
Journal of Capital Normal University：Natural Science Edition
基金
辽宁省教育厅项目(L201683679)。
关键词
海城市
易发性评价
地质灾害
确定性系数模型
Haicheng City
risk assessment
geological hazards
certainty factor model
