MAXIMUM DEPTH OF RESERVOIR DRAWDOWN.

Calculation of the firm power of a hydrostation as a function of the drawdown depth of the reservoir, giving material for a technical and economic determination of the maximum drawdown depth, should be carried out for a prescribed power regime in the design dry year. Calculation for a prescribed discharge regime distorts the general notion about the character of this functional relation. To avoid errors in calculations of the firm capacity and power production corresponding to it as a function of drawdown depth, it is necessary to take into account that in the case of streamflow regulation for purposes of the power industry a reservoir drawdown regime with a constant discharge is contraindicated.