Aspects of finding the minimum velocity of self-purification in storm sever networks

Aspects of finding the minimum rate of self-purification in storm sever networks are considered. The mechanism of solid particles movement caused by turbulence flow is considered. Performed analysis of storm sever networks building regulation in different countries has shown, that it is necessary to set clearer criterions for determination of runoff water minimum velocity in pipes. Results of the experimental research of using Shields and Galilee parameters for finding limits between different forms of solid particles movement caused by fluid flow are presented.

runoff water, solids, velocity of self-purification