长江经济带宜宾市地质灾害危险性评估
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摘要
以地处长江经济带,四川盆地和云贵高原过渡带的宜宾市为研究区域,选择地震加速度、地质灾害隐患、地表起伏、坡度、高程、岩石硬度、与断层距离、与水系距离、年平均降水和人类工程活动影响等10个指标,利用信息量分析模型对研究区地质灾害危险性进行评估。结果表明:宜宾市地质灾害危险度以中危险区和低危险区为主,总体处于中等水平;区内地质灾害隐患密度和地质灾害危险性相关,危险性越高,密度越大;评估结果为宜宾市地质灾害防治提供了依据,对长江经济带社会经济和谐发展具有重要意义。
Yibin City is located in the transition belt between the Sichuan Basin and the Yunnan-Guizhou Plateau,belonging to the Yangtze River economy belt.This paper makes risk assessment of geohazards of Yibin City by the use of an information value model and an evaluation index system consisting of such 10 indices as earthquake acceleration,geological hazards threat,surface fluctuation,slope,elevation,lithologic hardness,distance to faults,distance to water system,annual precipitation and distance to human activities.The results indicate that risk of geohazards of Yinbin City is dominated by medium and low risk area with overall at medium level.Potential density of geological hazards has a direct relationship to risk of geohazards.
Yibin City is located in the transition belt between the Sichuan Basin and the Yunnan-Guizhou Plateau,belonging to the Yangtze River economy belt.This paper makes risk assessment of geohazards of Yibin City by the use of an information value model and an evaluation index system consisting of such 10 indices as earthquake acceleration,geological hazards threat,surface fluctuation,slope,elevation,lithologic hardness,distance to faults,distance to water system,annual precipitation and distance to human activities.The results indicate that risk of geohazards of Yinbin City is dominated by medium and low risk area with overall at medium level.Potential density of geological hazards has a direct relationship to risk of geohazards.
引文
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[3]邓辉,何政伟,陈晔,等.信息量模型在山地环境地质灾害危险性评价中的应用--以四川泸定县为例[J].自然灾害学报,2014,23(2):67-76.
[4]张丽,李广杰,周志广,等.基于灰色聚类的区域地质灾害危险性分区评价[J].自然灾害学报,2016,18(1):164-168.
[5]贾贵义,全永庆,黎志恒,等.基于组合赋权法的白龙江流域甘肃段地质灾害危险性评价[J].冰川冻土,2014,36(5):1227-1236.
[6]邱海军.区域滑坡崩塌地质灾害特征分析及其易发性和危险性评价研究--以宁强县为例[D].西安:西北大学,2012.
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[8]漆良华,周金星,张旭东,等.长江上游山丘区土地承载力研究与评价-以四川省宜宾市为例[J].长江流域资源与环境,2007,16(2):169-174.
[9]BM Mejianavarro,EE Wohl,SD Oaks,Geological hazards,vulnerability,and risk assessment using GIS:Model of Glenwood《Geomorphology》,2010,10(s1-4):331-354.
[10]Holm,I Winkel,Zombies and Citizens:Hazardous Future Disaster,Representation and the Assessment of Risk《American Journal of Botany》,2015,100(5):844-856.
[11]袁明,何政伟,张俊峰.基于GIS的天山公路地质灾害危险性评价[J].地理空间信息,2007,5(6):70-73.