World Library  


Add to Book Shelf
Flag as Inappropriate
Email this Book

Simple Estimation of Fastest Preferential Contaminant Travel Times in the Unsaturated Zone: Application to Rainier Mesa and Shoshone Mountain, Nevada : Volume 7, Issue 3 (28/06/2010)

By Ebel, B. A.

Click here to view

Book Id: WPLBN0004012569
Format Type: PDF Article :
File Size: Pages 52
Reproduction Date: 2015

Title: Simple Estimation of Fastest Preferential Contaminant Travel Times in the Unsaturated Zone: Application to Rainier Mesa and Shoshone Mountain, Nevada : Volume 7, Issue 3 (28/06/2010)  
Author: Ebel, B. A.
Volume: Vol. 7, Issue 3
Language: English
Subject: Science, Hydrology, Earth
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2010
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

APA MLA Chicago

Ebel, B. A., & Nimmo, J. R. (2010). Simple Estimation of Fastest Preferential Contaminant Travel Times in the Unsaturated Zone: Application to Rainier Mesa and Shoshone Mountain, Nevada : Volume 7, Issue 3 (28/06/2010). Retrieved from http://www.ebooklibrary.org/


Description
Description: US Geological Survey, 345 Middlefield Rd., Menlo Park, California 94025, USA. Simulating contaminant transport in unsaturated zones with sparse hydraulic property information is a difficult, yet common, problem. When contaminant transport may occur via preferential flow, simple modeling approaches can provide predictions of interest, such as the first arrival of contaminant, with minimal site characterization. The conceptual model for unsaturated zone flow at two areas within the Nevada Test Site, Rainier Mesa and Shoshone Mountain, establishes the possibility of preferential flow through lithologies between potential radionuclide sources and the saturated zone. Lithology, saturated or near-saturated conditions in portions of the rock matrix, and relatively high recharge rates may act in concert at Rainier Mesa to promote preferential flow, despite the semi-arid climate. After identifying preferential flow as a possible contaminant transport process at Rainier Mesa and Shoshone Mountain, we apply a simple model to estimate fastest unsaturated travel times for conservatively-transported radionuclides to initially reach the saturated zone. Preferential flow travel times at Rainier Mesa are tens to hundreds of years for non-ponded water sources and one to two months for continuously-ponded water sources. If preferential flow occurs at Shoshone Mountain, the fastest travel times are approximately twice the Rainier Mesa estimates. A siliceous rock unit is present at Shoshone Mountain that may provide a barrier to preferential flow; if so, estimated transport times increase to more than a thousand years. Our analysis of unsaturated transport of radionuclides via preferential flow, using a relatively simple model, suggests that contaminated locations associated with continuously-supplied water sources, such as effluent ponds and water-filled tunnels, may have significantly shorter radionuclide travel times than locations not associated with such sources. The simple approach demonstrated here for estimating travel times can be useful in situations where predictions are needed by managers for the fastest arrival of contaminants, yet budgetary or time constraints preclude more rigorous analysis, and when additional model estimates are needed for comparison (i.e. model abstraction).

Summary
Simple estimation of fastest preferential contaminant travel times in the unsaturated zone: application to Rainier Mesa and Shoshone Mountain, Nevada

Excerpt
Amy, P. S., Haldeman, D. L., Ringelberg, D., Hall, D. H., and Russell, C. E.: Comparison of identification systems for classification of bacteria isolated from water and endolithic habitats within the deep subsurface, Appl. Environ. Microbiol., 58, 3367–3373, 1992.; Baker, R. S. and Hillel, D.: Laboratory tests of a theory of fingering during infiltration into layered soils, Soil Sci. Soc. Am. J., 54, 20–30, 1990.; Batzel, R. E.: Radioactivity associated with underground nuclear explosions, Lawrence Radiation Laboratory, Livermore, California, Lawrence Radiation Laboratory Report UCRL-5623, 14 pp., 1959.; Bechtel Nevada: Completion report for well ER-12-3, Corrective action unit 99: Rainier Mesa – Shoshone Mountain, US Department of Energy, Oak Ridge, Tennessee, US Department of Energy Report DOE/NV/11718–1182, 115 pp., 2006.; Borg, I. Y., Stone, R., Levy, H. B., and Ramspott, L. D..: Information pertinent to the migration of radionuclides in groundwater at the Nevada Test Site, Lawrence Livermore Laboratory, Livermore, California, Lawrence Livermore Laboratory Report UCRL-52078 – Part 1: Review and analysis of existing information, 216 pp., 1976.; Byers, F. M. J.: Porosity, density, and water content data on tuff of the Oak Spring Formation from U12e tunnel system, Nevada Test Site, Nye County, Nevada, US Geological Survey, Open-File Report 62-23, 28 pp., 1962.; Clebsch, A. J.: Ground water in the Oak Spring Formation and hydrologic effects of underground nuclear explosions at the Nevada Test Site, US Geological Survey, Open-File Report 60-27, 29 pp., 1960.; Clebsch, A. J. and Barker, F. B.: Analyses of ground water from Rainier Mesa, Nevada Test Site, Nye County, Nevada, US Geological Survey, Open File-Report 60-28, 23 pp., 1960.; Davis, P. K. and Bigelow, J. H.: Motivated metamodels; synthesis of cause-effect reasoning and statistical metamodeling, RAND Corporation Report MR-1570, 78 pp., 2003.; Department of Energy: Regional groundwater flow and tritium transport modeling and risk assessment of the underground test area, Nevada Test Site, Nevada, DOE Nevada Operations Office, Las Vegas, Nevada, US Department of Energy Report DOE/NV–477, 396 pp., 1997.; Department of Energy: United States Nuclear Tests July 1945 through September 1992, US Department of Energy, Las Vegas, Nevada, US Department of Energy Report DOE/NV–209-REV 15, 185 pp., 2000.; Dettinger, M. D.: Reconnaissance estimates of natural recharge to desert basins in Nevada, USA, by using chloride-balance calculations, J. Hydrol., 106, 55–78, 1989.; Dickey, D. D., Emerick, W. L., and Bunker, C. M.: Interim geological investigations in the U12b.09 and U12b.07 tunnels, Nevada Test Site, Nye County, Nevada, US Geological Survey, Open-File Report 62-37, 64 pp., 1962.; Diment, W. H., Wilmarth, V. R., McKeown, F. A., Dickey, D. D., Hinrichs, E. N., Botinelly, T., Roach, C. H., Byers, F. M. J., Hawley, C. C., Izett, G. A., and Clebsch, A. J.: Geological survey investigations in the U12b.03 and U12b.04 tunnels, Nevada Test Site, US Geological Survey, Washington, DC, Open-File Report 59-36, 75 pp., 1959.; Ebel, B. A. and Loague, K.: Rapid simulated hydrologic response within the variably saturated near surface, Hydrol. Proc., 22, 464–471, doi:10.1002/hyp.6926

 

Click To View

Additional Books


  • Exploring the Impact of Forcing Error Ch... (by )
  • Bias Correction Can Modify Climate Model... (by )
  • The Importance of Plant Water Use on Eva... (by )
  • Prediction, Time Variance, and Classific... (by )
  • The Development of Water Services and Th... (by )
  • Water Management Simulation Games and th... (by )
  • Groundwater Vulnerability Assessment to ... (by )
  • Bi-criteria Evaluation of the Mike She M... (by )
  • Potential and Limitations of Using Soil ... (by )
  • Modelling Runoff from a Himalayan Debris... (by )
  • Flood Frequency Estimation by Continuous... (by )
  • Geostatistical Modeling of Spatial Varia... (by )
Scroll Left
Scroll Right

 



Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.