文档介绍：
白龙江流域甘肃段历史地震对地质灾害的
影响分区#
巴瑞寿,梁收运**
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(兰州大学土木工程与力学学院,兰州 730000)
摘要:中强地震不仅会造成人员伤亡和财产损失,还常诱发大量地质灾害而使灾情加重。多
次历史强震使地质环境恶化加剧,为崩滑、地裂缝等地质灾害的发育提供有利的孕灾环境。
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
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 %、30%、25%和 %;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:白龙江流域;历史地震;地质灾害;地震叠加效应;分区
中图分类号:P694
Impact Zoning of Historical Earthquake on Geohazards at
the Gansu Segment in the Bailongjiang River Basin, China
BA Ruishou, LIANG Shouyun
(School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou,730000)
Abstract: Moderate-strong earthquake not only causes casualties and property losses, but also
intensifies the disaster due to triggering a large number of geohazards. Repeated earthquakes
aggravate the situation of geological environment, and offer beneficial conditions for geohazards,
such as avalanches, landslides, ground fractures, etc. Based on 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 and intensity Ⅵ was set as the
minimum magnitude and intensity of earthquake induced geohazards. The intensity Ⅵ and
higher intensity of historical earthquakes were weigh