2013 Progress Report: Prediction and quantification of Combined Sewer Outflows under extreme storm events: Flow dynamics and Reduction of Combined Sewer Outflows

EPA 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:
  1. 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.
  2. 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).
  3. 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:
  1. The mathematical formulation of common cases of overflow discharges at vertical shafts is under development.
  2. A 3D CFD two-phase flow model is in validation phase.
  3. 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:
  1. 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).
  2. 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.
  3. The developed 3D CFD two-phase flow approach will be implemented to an open source CFD model (OpenFoam).

Journal Articles:

No journal articles submitted with this report: View all 17 publications for this project

Relevant Websites:

Projects | Christopher Gifford-Miears | Research group of Dr. Arturo S. Leon | School of Civil and Construction Engineering| Oregon State University Exit

Progress and Final Reports:

Original Abstract
2012 Progress Report
2014 Progress Report
2015 Progress Report
Final Report