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A Study of Inlet Control Alternatives for SWM

by Ronald D. Townsend, Univ of Ottawa, Dep of Civil, Engineering, Ottawa, Ont, Canada,



Document Type: Proceeding Paper

Part of: Advances in Underground Pipeline Engineering

Abstract:

A laboratory study of alternatives for effecting inlet control on urban storm sewer systems for stormwater management (SWM) is described. The test facility was a full-size physical model of a simple street inlet arrangement. The forms of control examined included: reduction of the street inlet grating's hydraulic area; an orifice plate located in the well of the model catchbasin structure; and simple flow restrictors at entry to the catchbasin's outlet pipe. Principal considerations in judging the effectiveness and practicality of the different options tested were: hydraulic performance, especially when flows contained large debris components; cost; and certain 'maintenance' considerations. Based on an extensive testing program, the most effective site for an ancillary control device was the entrance section to the catchbasin's outlet pipe.

Subject Headings: Stormwater management | Inlets (waterway) | Laboratory tests | Hydraulic models | Spillways | Sewers | Pipeline management

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