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UDC 628.311

Palagin Evgenii, Tsypin A. V., Bykova P. G., Vdovin D. V.

Determining the capacity of the surface runoff treatment facilities in the Volga federal district

Summary

Summarized data on the maximum rainfall precipitation depth removed as surface runoff to the treatment facilities of the Volga federal district are presented. The analysis of the revealed trends is given. In order to determine the maximum precipitation depth the data obtained by the weather stations in the process of long-term rainfall observations in a specific region (for more than 10–15 years) as well as the records of the nearest representative weather stations can be used as baseline information. In the absence of long-term data the value of the maximum precipitation depth in the range of 5–10 mm can be taken. The conducted research provided for determining the daily precipitation depth of low-intensive frequent rains with the period of single exceedance of the predicted rate Р = 0.05–0.1 year. The daily precipitation depth in most big cities of the Volga federal district varies from 2.2 to 8.9 mm; the precipitation depth providing for more than 70% of the annual runoff varies in a more narrow range of 4.6–6.1 mm.

Key words

rainfall volume , precipitation depth , distribution function , predicted rate exceedance , local treatment facilities capacity

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