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Procedure and techniques of long-term seismic and seismologic observations along the underwater profile on the bottom of the inguri reservoir

Methode et technique des observations seismiques et seismologiques a long terme suivant le profil sous l'eau sur le fond de la retenue d'ingouri

  • IAEG Symposium “Engineering Geological Problems in Hydrotechnical Contruction”, Tbilisi (USSR), 12–19 September 1979
  • Experience in Site Investigation for Dam Construction in Folded Areas Communications
  • Published:
Bulletin of the International Association of Engineering Geology - Bulletin de l'Association Internationale de Géologie de l'Ingénieur Aims and scope Submit manuscript

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Summary

An underwater observation network has been arranged in the area of the Inguri Hydroelectric Power Station in the Caucasus in order to investigate the effect of the storage reservoir on the dynamics of deformation processes in the reservoir bottom. The seismic detectors and seismometers were installed in watertight containers in the deepest part of the reservoir along a line traversing the tectonic faults of this area. It is planned to carry out observations of dynamic and kinematic features of propagation of waves resulting from test blasts and to record possible earthquakes caused by the creation of the reservoir over a number of years. According to the results of test shooting made at regular intervals of time, the increase of the apparent velocity in the hodograph after the start of the reservoir filling and amplification of the fault reflecting power were observed. The experience gained in arrangement of the underwater network will be useful in the organization of similar observation systems.

Résumé

Aux fins d'étudier l'influence de la retenue sur la dynamique des processus de déformation dans sa fondation, un réseau d'observations sous l'eau est créé dans la zone de construction du haut barrage-voûte d'Ingouri au Caucase. Les capteurs de prospection séismique et les séismographes sont installés dans des containers étanches dans la partie la plus profonde de la retenue le long de la ligne traversant les accidents tectoniques de la zone. On prévoit d'effectuer pendant plusieurs années les observation sur les variations des particularités dynamiques et cinétiques du passage des ondes à partir des explosions d'études et d'enregistrer les éventuels séismes provoqués par la création de la retenue. Suivant les données des tirs périodiques le long du profil, il existe une augmentation de la vitesse apparente à l'odographe, une fois la mise en eau du barrage commencée, et un accroissement de la capacité de réflexion de la faille. L'experience acquise sera utile pour l'organisation de tels réseaux d'observations sous l'eau.

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References

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Authors and Affiliations

  1. “Hydroproject” Institute, Moscow, USSR

    Savich A. I., Anichkin V. N., Ilyin M. M. & Kalinin N. I.

  2. Geophysical Institute, Academy of Sciences of the Georgian SSR, Tbilisi, USSR

    Chighiberiya M. G.

Authors
  1. Savich A. I.
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  2. Chighiberiya M. G.
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  3. Anichkin V. N.
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  4. Ilyin M. M.
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  5. Kalinin N. I.
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Savich, A.I., Chighiberiya, M.G., Anichkin, V.N. et al. Procedure and techniques of long-term seismic and seismologic observations along the underwater profile on the bottom of the inguri reservoir. Bulletin of the International Association of Engineering Geology 20, 114–116 (1979). https://doi.org/10.1007/BF02591259

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  • DOI: https://doi.org/10.1007/BF02591259

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