Chapter
Apr 26, 2012
Assessing Hydrodynamic Separators under High Water Flow Conditions
Authors: David Saddoris [email protected], Omid Mohseni [email protected], and John Gulliver [email protected]Author Affiliations
Publication: World Environmental and Water Resources Congress 2009: Great Rivers
Abstract
Underground hydrodynamic separators are widely used in urban areas for removal of suspended solids and floatables from stormwater due to limited land availability for the installation of above ground stormwater best management practices (BMPs). Hydrodynamic separators are sized for applications based on design runoff from the drainage basins that they serve. However, during less frequent storm events, device maximum treatment rates are exceeded and previously captured sediments can be scoured and washed out of these devices. A methodology has been developed to assess sediment retention in hydrodynamic separators under water flow rates exceeding their maximum design treatment rates. This new testing protocol has been used in controlled field and laboratory tests on full-scale commercial devices under high water flow conditions to determine sediment retention performance. Application of this work is primarily to establish the frequency of required cleaning for installed devices.
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© 2009 American Society of Civil Engineers.
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Published online: Apr 26, 2012
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Graduate Research Assistant, Department of Civil Engineering, University of Minnesota, 2 Third Avenue SE, Minneapolis, MN 55414. E-mail: [email protected]
Adjunct Associate Professor, Department of Civil Engineering, University of Minnesota, 2 Third Avenue SE, Minneapolis, MN 55414. E-mail: [email protected]
Professor, Department of Civil Engineering, University of Minnesota, 122 Civil Engineering Building, 500 Pillsbury Drive SE, Minneapolis, MN 55455. E-mail: [email protected]
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