[1]MAO Yu-ping,WANG Yang-long,FU Hong,et al.Reservoir-induced Seismicity and Geological Tectonic Environment of Manwan and Dachaoshan Reservoirs in the Middle Reaches of Lancangjiang River of Yunnan[J].Journal of Seismological Research,2008,31(03):209-214.
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Reservoir-induced Seismicity and Geological Tectonic Environment of Manwan and Dachaoshan Reservoirs in the Middle Reaches of Lancangjiang River of Yunnan
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
31
Number of periods:
2008 03
Page number:
209-214
Column:
Public date:
2008-03-23
- Title:
- Reservoir-induced Seismicity and Geological Tectonic Environment of Manwan and Dachaoshan Reservoirs in the Middle Reaches of Lancangjiang River of Yunnan
- Keywords:
- middle reaches of Lancangjiang River; reservoir-induced seismicity; tectonic environment; Yunnan
- CLC:
- P315.7
- DOI:
- -
- Abstract:
- Both Manwan and Dachaoshan reservoirs were constructed in the middle reaches of Lancangjiang River,Yunnan. They are border upon, and alike in many aspects. For example, both are located in complex tectonic environment of thrusts, have almost the same scale, and the dam height and capacity all reach the level to induce earthquake. However, their post-impoundment seismicities are very different. Significant reservoir-induced seismicity(RIS)occurred in the Manwan reservoir area after the reservoir impounding; but the seismicity had not increased in the Dachaoshan reservoir area in 5 years after impounding. Based on the post-impoundment seismicity, the strata and the characteristics of the faults in the reservoir areas, we conclude that the RIS in the Manwan and Dachaoshan reservoir areas should not be attributed to the permeation of water, karst collapse, reservoir scale, stress environment, large active faults running through the reservoir areas, and the property of faults to a great extent, may be caused by the rupture of NE- and NW-trending faults developing along Majie, Yaojie,and Shaojie. Of these faults,most are normal faults, and the fault planes lean to the reservoirs.
- References:
- -
- Similar References:
Memo
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Last Update:
2008-03-23