Enisei River Research Articles

Change of the hydraulic and bed regimes of the Enisei river in the vicinity of the Sayan-Shushsk hydroelectric station

1. The stream gauging network in the construction area of the Sayan-Shushsk hydroelectric station and the investigations conducted provided comprehensive hydrologic data needed for desigming the hydraulic structures at the stage of drawing up the working plans. 2. Passage of flood discharges during the 1969–1970 construction period, through the channel narrowed by cofferdams of the first line, did not do serious damage to the artificial structures, thanks to the optimal layout and order of construction. 3. In connection with the absence of reliable instruments for observing sediment transport, the method of revealing channel deformation under natural conditions by means of detailed surveys of the channel relief, and comparison of the plans, is an effective method for evaluating the re-formations of the river bed and for determining subsequent trends of channel re-formation. 4. A comparison of the full-scale data of the hydraulic and channel regimes of the Enisei with the calculated and laboratory data of VNIIG shows a satisfactory agreement of the results.

The Sayan-Shushensk hydroelectric station on the Enisei river

The Sayan-Shushensk hydroelectric station on the Enisei river

Re-formation of the channel of the enisei river in the lower pool of the Krasnoyarsk hydroelectric power station

1. At first the main re-formation of the channel occurred in the immediate vicinity of the structures, with its subsequent extension downstream. 2. The asymmetric distribution of discharges over the dam front in 1964 caused scouring of the river bottom in the direct neighborhood of the apron, which encompassed the fractured bedrock. Deposition of the erosion products, which were of large size, occurred near the erosion zone where a bar formed. 3. During flood periods the volume of accumulated sediments greatly exceeded the volume of bottom erosion, which is explained by the erosion of the cofferdams and the channel bottom near the apron, removal, of soil from the banks, and to some extent, by the less dense placement of the accumulating deposits.

The latitude distribution, integral multiplicities and coupling coefficients for the neutron, total ionizing and hard components of cosmic rays

This report presents the results of the latitude measurements of the cosmic-ray intensity at sea level and in the stratosphere in August–October 1965, during the expedition which covered the route from Enisei River via the Artic Ocean, Volga River, Caucasus, to Middle Asia. The integral multiplicities of generation and the coupling coefficients have been found from the obtained intensity-dependences of various components for observations at sea level, at mountain level, and in the stratosphere. The East-West asymmetry of the total ionizing and hard components for zenith angles of 33° and 53° has been found and the coupling coefficients for the oblique components have been determined.