| Abstract: | | 1. | It was shown that the relation between the coefficients of water exchange and water renewal of reservoirs is determined by a transcendental equation, which is expressed by a family of curves on a graph. | | 2. | A test of the hypothesis that the average concentration of admixtures in a valley reservoir with a slow external water exchange is equal to the concentration at its outlet on the basis of on-site data showed a satisfactory convergence of the results. The average errors for the majority of ingredients checked were±5–±10%. With a probability of 0.90 the errors do not exceed±20%. |
Analytic equations were obtained for calculating the quality of collector-drain waters. A graphic method of calculation is given. |
