江油市地质灾害时空分布规律和孕灾环境研究  

Temporal-spatial distribution and disaster-inducing environment of geo-hazards in Jiangyou City, Sichuan Province, China

作　　者：罗承 陈廷芳[1] 付琪智[1] 李世川 吴绍坤 LUO Cheng;CHEN Tingfang;FU Qizhi;LI Shichuan;WU Shaokun(School of Environment and Resources,Southwest University of Science and Technology,Mianyang 621010,China;Sichuan 909 Construction Engineering Co.,Ltd.,Mianyang 621000,China)

机构地区：[1]西南科技大学环境与资源学院,四川绵阳621010 [2]四川九〇九建设工程有限公司,四川绵阳621000

出　　处：《人民长江》2019年第12期95-100,共6页Yangtze River

基　　金：国家科技支撑计划资助项目(2011BAK12B02)

摘　　要：地质灾害会对人类的生产生活造成巨大的破坏和损失,研究灾害的分布规律与孕灾环境有助于减轻其带来的负面影响。以江油市为例,从时空分布规律和孕灾环境出发,通过对区内410处地质灾害进行深入调查研究,得出了以下结论:①江油市境内的地质灾害整体上呈现出点多面广、时空分布不均、暴发时段集中、危害性大等特点;②时间上具有季节性和周期性,空间上表现为北部沿河流两侧呈条带状集中分布,南部灾害点分散,且具有在海拔550~750m范围内、在直线型和阶梯型斜坡地段相对集中的特点;③地质灾害的孕育主要受地形地貌、地层岩性、地质构造、地震活动、降雨、人类活动等因素的影响。研究结果可为江油市实现减少灾害损失向减轻灾害风险转变、最大限度降低风险隐患、防灾减灾、监测预警等提供科学依据。Geo-hazards could cause tremendous damages and losses to human production and life.Study on disasters is helpful to alleviate their negative impacts.Temporal-spatial distribution and disaster-inducing environment of geo-hazards are deeply studied on account of 410 geo-hazards in Jiangyou City.The study shows:(1)Geo-hazards in Jiangyou City are characterized as large quantities,broad area,uneven spatial-temporal distribution,concentrated outbreak period and severe harmfulness.(2)Temporally,it has seasonality and periodicity;spatially,there is a banding concentrated distribution along both sides of the river in the north,and the disaster points in the south are scattered with the characteristics of relative concentration in linear and step-type slope sections in the attitude of 550~750 m.(3)Disaster-inducing environment is controlled by topography,stratigraphic lithology,geological structure,seismic activity,rainfall,human activities.The results can provide scientific basis for Jiangyou City to change from disaster loss reduction to disaster risk reduction,minimize potential risks,prevent and mitigate disasters and monitor and early warning.

关 键 词：时空分布规律 孕灾环境 地质灾害 江油市 

分 类 号：X43[环境科学与工程—灾害防治]