Record Display for the EPA National Library Catalog


Main Title Tracer-test planning using the efficient hydrologic tracer-test design (EHTD) program
Author Field, Malcolm S.
CORP Author Environmental Protection Agency, Washington, DC. National Center for Environmental Assessment.
Publisher U.S. Environmental Protection Agency, National Center for Assessment,
Year Published 2003
Report Number EPA/600/R-03/034 ; EPA/600/CR-03/034
Stock Number PB2003-103271
OCLC Number 53479915
Subjects Groundwater flow--United States ; Groundwater tracers--United States ; Volatile organic compounds--Environmental aspects--United States ; Groundwater--Purification--United States
Additional Subjects Tracer techniques ; Hydrology ; Dyes ; Ground water ; Solutes ; Test methods ; Mathematical models ; Mass transport ; Concentration(Composition) ; Sampling ; Environmental protection ; Solute transport
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EHAD  EPA/600/R-03-034 Region 1 Library/Boston,MA 12/12/2003
EHBD  EPA/600/R-03/034 CEMM/ACESD Library/Narragansett,RI 02/23/2007
EJED  EPA/600/CR-03/034 CD-ROM OCSPP Chemical Library/Washington,DC 01/23/2004
EJED  EPA/600/R-03/034 OCSPP Chemical Library/Washington,DC 01/23/2004
EKBD  EPA-600/R-03-034 Research Triangle Park Library/RTP, NC 12/05/2003
ELBD ARCHIVE EPA/600/R-03/034 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ELBD  EPA 600-R-03-034 AWBERC Library/Cincinnati,OH 02/13/2004
EMBD  EPA/600/R-03/034 NRMRL/GWERD Library/Ada,OK 12/12/2003
ERAD  EPA/600/R-03-034 Region 9 Library/San Francisco,CA 11/28/2003
ESAD  EPA 600-R-03-034 Region 10 Library/Seattle,WA 12/05/2003
NTIS  PB2003-103271 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation xiv, 175 p. : ill., charts ; 28 cm. + 1 computer disk.
Hydrological tracer testing is the most reliable diagnostic technique available for establishing flow trajectories and hydrologic connections and for determining basic hydraulic and geometric parameters necessary for establishing operative solute-transport processes. Tracer-test design can be diffcult because of a lack of prior knowledge of the basic hydraulic and geometric parameters desired and the appropriate tracer mass to release. A new effcient hydrologic tracer-test design (EHTD) methodology has been developed that combines basic measured field parameters (e.g., discharge, distance, cross-sectional area) in functional relationships that describe solute-transport processes related to flow velocity and time of travel. The new method applies these initial estimates for time of travel and velocity to a hypothetical continuously stirred tank reactor as an analog for the hydrologic flow system to develop initial estimates for tracer concentration and axial dispersion, based on a preset average tracer concentration. Root determination of the one-dimensional advection-dispersion equation (ADE) using the preset average tracer concentration then provides a theoretical basis for an estimate of necessary tracer mass. Determining the necessary tracer mass, the initial sample-collection time, and the subsequent sample-collection frequency for a proposed tracer test are the three most diffcult aspects to estimate prior to conducting the test. To facilitate tracer-mass estimation, 33 mass-estimation equations have been developed over the past century. The 33 equations are reviewed here; 32 of them were evaluated using previously published tracer-test design examination parameters. The purpose of this paper is to answer three basic questions common at the start of any hydrologic tracer test: (1) How much tracer mass should be released; (2) When should sampling start; and (3) At what frequency should samples be collected. In this paper an e.cient hydrologic tracer test design (EHTD) methodology for estimating tracer mass based on solute transport theory is developed. Use of the methodology developed here leads to a better understanding of the probable transport processes operating in the system prior to conducting the tracer test. Improved understanding of the transport processes then leads to better estimates of tracer mass to be released. In addition, initial sample collection times and sample collection frequencies are calculated using solute transport theory.
"April 2003." "EPA/600/R-03/034." Includes bibliographical references (p. 166-175).