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白龙江流域甘肃段历史地震对地质灾害的影响分区

发表时间:2015-06-30  浏览量:1670  下载量:426
全部作者: 巴瑞寿,梁收运
作者单位: 兰州大学土木工程与力学学院
摘 要: 通过对地震及地质灾害频发的白龙江流域甘肃段历史地震及地质灾害资料的分析,设定5.0级和Ⅵ度为诱发地质灾害的最小地震震级和烈度,借助GIS技术,采用因子叠加法进行历史地震Ⅵ度及以上烈度区的加权叠加并分区。结果表明,高、较高、中和低影响区分别占研究区总面积的16.5%,28.0%,25.0%和30.5%;各影响区内地质灾害数量及密度随历史地震影响程度的降低呈减少趋势,反映了地质灾害的发育分布明显受历史地震叠加效应的影响,区划结果可为区域地质灾害评价和防治工作提供借鉴。
关 键 词: 地质学;地震叠加效应;地理信息系统;地质灾害
Title: Impact zoning of historical earthquake on geohazards at the Gansu segment in the Bailongjiang river basin, China
Author: BA Ruishou, LIANG Shouyun
Organization: School of Civil Engineering and Mechanics, Lanzhou University
Abstract: By analyzing the data of historical earthquakes and geohazards at the Gansu segment of Bailongjiang river basin where seismic actions and geohazards were frequent in China, the Ms of 5.0 and intensity degree of Ⅵ were set as the minimum magnitude and intensity degree of earthquake induced geohazards, respectively. The intensity degree of Ⅵ and higher degrees of historical earthquakes were weighted stack by GIS combined with factors superposition method. The results show that the proportions of very high, high, moderate and low influence area are 16.5%, 30.0%, 28.0% and 30.5% of the total area, respectively; with the decrease of historical earthquakes’ impact, the geohazards quantity and density in each influence area are overall attenuated gradually, which reveals that the geohazards are strongly affected by historical earthquakes’ superimposed effect. The results of impact zoning can provide a reference for assessment and prevention of regional geohazards.
Key words: geology; earthquakes superimposed effect; geographic information system; geohazards
发表期数: 2015年6月第12期
引用格式: 巴瑞寿,梁收运. 白龙江流域甘肃段历史地震对地质灾害的影响分区[J]. 中国科技论文在线精品论文,2015,8(12):1243-1251.
 
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