Construction of geodetic networks for studying crustal movements when creating hydraulic structures in seismic regions

Conclusions

On the basis of the particular examples of geodetic works in the region of design and construction of the Bartogai and Bestyuba reservoirs we can recommend the following sequence of studying CVCM in highly seismic regions of constructing large hydraulic structures:

A study of the geological structure of the region from literature sources (morphostructural plan, fault tectonics, contemporary crustal movements);

Study of the contemporary crustal movements from the results of precision levelings of the state vertical control network. Study of the degree of activity of large faults in the crust of the region in connection with strong earthquakes;

Creation of networks of the first level — deformation areas — in the region of the site of the dam and other large structures, regime observations for studying the small-block structure of the construction region (microregionalization) and activity of microfractures and cracks;

Equipping the networks of the second level and establishment of the initial stage of observations on long profiles around the bed of the future reservoir and across the shores. Repeat, as required, of leveling of sections of the line of the state vertical control network for determining the tendencies of the “secular” crustal movements;

Analysis of the data of the observations and development of recommendations aimed at refining the designs, safe operation of the hydraulic structures, and further development of geodetic works at the stage of using the objects in the economy.