2013 Progress Report: Prediction and quantification of Combined Sewer Outflows under extreme storm events: Flow dynamics and Reduction of Combined Sewer OutflowsEPA Grant Number: R835187
Title: Prediction and quantification of Combined Sewer Outflows under extreme storm events: Flow dynamics and Reduction of Combined Sewer Outflows
Investigators: Leon, Arturo
Institution: Oregon State University
EPA Project Officer: Hiscock, Michael
Project Period: June 1, 2012 through May 31, 2017
Project Period Covered by this Report: June 1, 2013 through May 31,2014
Project Amount: $265,528
RFA: Extreme Event Impacts on Air Quality and Water Quality with a Changing Global Climate (2011) RFA Text | Recipients Lists
Research Category: Global Climate Change , Earth Sciences - Environmental Science , Aquatic Ecology and Ecosystems , Aquatic Ecosystems , Air Quality and Air Toxics , Water Quality , Climate Change , Air , Water
Objective:The project objectives are to:
- Develop a mathematical formulation for common cases of overflow discharges (e.g., combined sewer overflows [CSOs]) at vertical shafts and near-horizontal outlets under extreme flow events.
- Implement the mathematical formulation of overflows into a state-of-the-art open source (free and open access) transient flow model that can be used in complex combined sewer systems (CSSs).
- Validate the overflow discharge framework under highly dynamic flow conditions. The Portland CSS (Oregon), which has experienced recent geysering events, will be used as test case.
Progress Summary:As of August 21, 2014, the following list of accomplishments has been achieved:
- The mathematical formulation of common cases of overflow discharges at vertical shafts is under development.
- A 3D CFD two-phase flow model is in validation phase.
- The flow recirculation system that will host the hydraulic model of the Portland CSS is under construction and will be completed in 7 weeks.
Future Activities:The planned future activities are:
- The mathematical formulation of common cases of overflow discharges at vertical shafts will be further developed, validated and implemented into a state-of-the-art transient analysis program Illinois Transient Model (ITM).
- Laboratory experiments of overflow discharges under extreme events (Portland CSS) will be conducted in the Multipurpose River Hydraulics Research Facility at O.H. Hinsdale Wave Research Laboratory at Oregon State University.
- The developed 3D CFD two-phase flow approach will be implemented to an open source CFD model (OpenFoam).