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Article | REF: W6901 V1

Functions and types of storm overflows

Authors: José VAZQUEZ, Claude JOANNIS, Mathieu ZUG

Publication date: February 10, 2009

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1. Definitions and objectives

1.1 Terminology

According to the sanitation encyclopedia [1] , a storm overflow (SO) is "a structure that allows part of the effluent to be discharged directly into the natural environment when the upstream flow exceeds a certain value. Storm overflows are generally installed on combined sewer systems, with the aim of limiting inputs to the downstream network, and in particular to wastewater treatment plants, in the event of rainfall".

This definition focuses on the structure's two main hydraulic functions:

  • regulate downstream flows to keep them below a set value (or threshold value);

  • ...

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