esm223_13_Reading_Davisson_et_al_Isotopes_for_Recharge_LLNL_1998

Esm223_13_Reading_Davisson_et_al_Isotopes_for_Recharge_LLNL_1998

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
UCRL-JC-129656 PREPRINT Isotope Tracer Approaches for Characterizing Artificial Recharge and Demonstrating Regulatory Compliance M. Lee Davisson G. Bryant Hudson Jean E. Moran Sid Niemeyer Roy Herndon This paper was prepared for submittal to the Annual UC Water Reuse Research Conference Monterey, CA June 4-5,1998 May 1998 Thisisapreprintof apaperintendedforpublicationinajoumalorproceedings. Since changes may be made before publication, this preprint is made available with the understanding that it will not be cited or reproduced without the permission of the author.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
DISCLAIMER This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes.
Background image of page 2
Annual UC Water Reuse Research Conference, June 4-5, 1998, Monterey, California ISOTOPE TRACER APPROACHES FOR CHARACTERIZING ARTIFICIAL RECHARGE AND DEMONSTRATING REGULATORY COMPLIANCE. M. Lee Davisson (davisson2@Ilnl.gov), G. Bryant Hudson, Jean. E. Moran, Sid Niemeyer Isotope Sciences Division, Lawrence Livermore National Laboratory P.O. BOX 808 L-23 1, Livermore, CA 94550 Roy Herndon Orange County Water District, IO.500 Ellis Ave. Fountain Valley, CA 92728 ABSTRACT Potable reuse of groundwater from waste- water origins requires new methods to quantify proposed regulatory criteria such as subsurface residence times, dilution, and water quality transitions. Isotope tracers oxygen-18 ( ‘*O), tritium (3H), dissolved noble gases, and radiocarbon (14C) have been used together in Orange County to age-date groundwater, quantify mixing, and characterize changes in total organic carbon (TOC). Simultaneous measurements of 3H and helium-3 (3He) are used to determine groundwater ages between 1 and 40 years with uncertainties of + one year. These ages map preferred groundwater flowpaths and identify groundwater ages of 51 year. Wells recharged from the Anaheim Lake spreading basin were used to monitor arrival times - and dilution of 6000 acre-ft of **O- distinct Colorado River (COR) water introduced during a controlled recharge experiment. In addition, isotopically enriched Xe was introduced into the basin to quantify COR dilution of >90%. The COR arrived at 7 wells between 30 and 200 days after recharge commenced. The COR was diluted up to 90%
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 9

Esm223_13_Reading_Davisson_et_al_Isotopes_for_Recharge_LLNL_1998

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online