SUMMARY

Earthquake hazard assessment
for the
Đà River hydroelectric ladder region

Nguyn Đc Cường, Đặng Thanh Hải, Cao Đình Trọng, Thái Anh Tuấn

In this paper, the authors present some results of earthquake hazard assessment for Đà River ladder of hydropower plants according to probabilistic and neo-deterministic I approaches. The results have shown that: According to the probabilistic approach, Tuan Giáo district, Điện Biên province, has the largest ground accelerations with respect to the following periods: 50 years (84 cm/s2); 100 years (114 cm/s2), 200 years (150cm/s2), 500 years (195 cm/s2), and 10,000 years (395 cm/s2); In the meantime, the neo-deterministic approach for earthquake hazard prediction has shown that the Tuần Giáo area has the maximum horizontal ground displacement (Dmax) equal to 21-23 maximum horizontal velocity (Vmax) in the range of 22-25 cm/s and maximum grounti motion (Amax) ranging from 200-250 cm/s2. In the case of missing observation earthquake data, the combination of both probabilistic and neo-deterministic approacl allows us to improve the efficiency of earthquake hazard assessment and prediction 11the Đà River Ladder of hydropower plants.

Người biên tập: PGS. TS Nguyễn Hồng Phương.