大渡河流域地震活动特征

本文通过对大渡河流域强震和弱震活动特征的研究发现,大渡河流域的强震活动频度高、强度大,对梯级水电站的影响显著。大渡河流域内的强震大部分以丛集的方式发生,其地震丛集的强度、频度和时间间隔都比较高,而且强震丛集密集发生的地方与大渡河梯级水电站的距离较近,因此,在大渡河流域梯级水电站地震安全综合防御工作中,应充分考虑强震丛集的发生特征。

Seismic Activity in Daduhe River Area

Through analysis of both strong and weak seismic activity in Daduhe river area, we found that the seismicity in the study area is characterized by high frequency and strong intensity. The strong seismic activity has a remarkable effect on the cascade hydropower stations. In the study area earthquakes mainly occurred in clustering mode with high frequency, strong intensity and short interval period. Therefore, such characteristics of clustering earthquakes should be paid more attention in the integrated defense of seismic safety of the cascade hydropower stations.