摘要
利用自编软件,对广西大藤峡水库地震危险性进行分析。将大藤峡水库划分为5个库段,选用8个诱震因素计算各库段的震级概率及相应的烈度。结果表明,水库蓄水后,库尾-勒马库段和大肚湾-坝址库段具有发生中强水库地震的可能性,概率分别为0.499与0.272,而勒马与大肚湾之间的三个库段,发震的可能性较小。在此条件下,利用水库地震烈度衰减关系,得出库尾-勒马库段和大肚湾-坝址段的震中烈度可达Ⅵ,长短轴长度分别为6.7、3.8 km和5.9、3.3 km。
Earthquake hazard of Datengxia reservoir in Guangxi region is analyzed using the self-made soft- ware. The whole reservoir is divided into five segments, and eight factors are chosen to calculate the magnitude probability and the corresponding intensity of each segment. The results show that it is possible for the moderate- strong earthquake occurring in Kuwei to Lema and Daduwan to the dam after impoundment, the probabilities are 0. 499 and 0. 272, respectively. It is less likely to occur earthquake in the three segments between Lema and Dadu- wan. Under these circumstances, the epicentral intensity of the Kuwei to Lema and Daduwan to the dam segments will reach VI based on the intensity attenuation relationship of reservoir induced earthquake, and the lengths and widths of the isoseismal are 6.7 kin, 3.8 km and 5.9 km, 3.3 km, respectively.
出处
《大地测量与地球动力学》
CSCD
北大核心
2013年第4期26-30,共5页
Journal of Geodesy and Geodynamics
基金
中国长江三峡工程开发总公司专项基金(SXSN/2377)
中国地震局地震研究所所长基金(IS201102643)
关键词
水库地震
大藤峡水库
概率预测模型
发震因子
震中烈度
reservoir induced earthquake
Datengxia reservoir
statistical forecasting model
impact factor
epicen-tral intensity
