EPA Science Inventory

TRACER DISPERSION STUDIES FOR HYDRAULIC CHARACTERIZATION OF PIPES

Citation:

PANGULURI, S., Y. J. YANG, R. HAUGHT, R. M. CLARK, R. KRISHNAN, AND D. SCHUPP. TRACER DISPERSION STUDIES FOR HYDRAULIC CHARACTERIZATION OF PIPES. In Proceedings, ASCE 2007 World Environment and Water Resources Congress, Restoring our natural Habitat, Tampa, FL, May 15 - 19, 2007. American Society of Civil Engineers (ASCE), Reston, VA, 501, (2007).

Description:

A series of experiments were conducted at the U. S. Environmental Protection Agency (EPA) Test & Evaluation (T&E) Facility in Cincinnati, Ohio, to quantify longitudinal dispersion of a sodium fluoride tracer in polyvinyl chloride (PVC) pipe and ductile iron pipe under laminar, transitional, and turbulent flow conditions. The tracer injection durations were varied at different flow conditions to study their impacts on the tracer transport characteristics. Pitottube type sampling ports were built into the pipe systems to study the in-pipe behavior of the tracer and identify the optimal sampling position. Preliminary tests confirmed the linear relationship between conductivity and fluoride, as published in previous EPA studies (Boccelli et al., 2004, Panguluri et al., 2005). Thereafter, conductivity (measured using online sensors) was used to characterize the dispersion and diffusion of the tracer material. The experiments indicate that the amount of tracer measured decreased with increase in flow rate regardless of pipe material. This observation supports the theory that there may be an increase in adsorption/reaction phenomena observed with increases in velocity. This result, if confirmed with the upcoming chlorine/chloramine disinfectant kinetic studies, may have an impact on how distribution systems are operated and modeled.

Purpose/Objective:

SDWA

URLs/Downloads:

TRACER DISPERSION STUDIES FOR HYDRAULIC CHARACTERIZATION OF PIPES   Exit

164843.PDF   (PDF,NA pp, 292 KB,  about PDF)

Record Details:

Record Type: DOCUMENT (PAPER IN NON-EPA PROCEEDINGS)
Start Date: 05/15/2007
Completion Date: 05/15/2007
Record Last Revised: 12/18/2008
Record Created: 02/21/2007
Record Released: 02/21/2007
OMB Category: Other
Record ID: 164843

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL RISK MANAGEMENT RESEARCH LABORATORY

WATER SUPPLY AND WATER RESOURCES DIVISION

WATER QUALITY MANAGEMENT BRANCH