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Title: Preliminary evaluation of the importance of existing hydraulic-head observation locations to advective-transport predictions, Death Valley regional flow system, California and Nevada

Abstract

When a model is calibrated by nonlinear regression, calculated diagnostic statistics and measures of uncertainty provide a wealth of information about many aspects of the system. This report presents a method of ranking the likely importance of existing observation locations using measures of prediction uncertainty. It is suggested that continued monitoring is warranted at more important locations, and unwarranted or less warranted at less important locations. The report develops the methodology and then demonstrates it using the hydraulic-head observation locations of a three-layer model of the Death Valley regional flow system (DVRFS). The predictions of interest are subsurface transport from beneath Yucca Mountain and 14 underground Test Area (UGTA) sites. The advective component of transport is considered because it is the component most affected by the system dynamics represented by the regional-scale model being used. The problem is addressed using the capabilities of the U.S. Geological Survey computer program MODFLOW-2000, with its ADVective-Travel Observation (ADV) Package, and an additional computer program developed for this work.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
United States Geological Survey - Nevada, Las Vegas, NV (US)
Sponsoring Org.:
USDOE Nevada Operations Office (US)
OSTI Identifier:
786301
Report Number(s):
USGS WRIR 00-4282
TRN: US0108877
DOE Contract Number:  
AI08-96NV11967
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 1 Aug 2001
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; CALIFORNIA; HYDROLOGY; ENVIRONMENTAL TRANSPORT; GEOLOGIC MODELS; GEOLOGIC SURVEYS; YUCCA MOUNTAIN; HYDRAULIC CONDUCTIVITY; NEVADA TEST SITE; DEATH VALLEY; REGIONAL FLOW SYSTEM; NEVADA; TRANSPORT; MODEL; SUBSURFACE

Citation Formats

Hill, M.C., Ely, D.M., Tiedeman, C.R., O'Brien, G.M., D'Agnese, F.A., and Faunt, C.C. Preliminary evaluation of the importance of existing hydraulic-head observation locations to advective-transport predictions, Death Valley regional flow system, California and Nevada. United States: N. p., 2001. Web. doi:10.2172/786301.
Hill, M.C., Ely, D.M., Tiedeman, C.R., O'Brien, G.M., D'Agnese, F.A., & Faunt, C.C. Preliminary evaluation of the importance of existing hydraulic-head observation locations to advective-transport predictions, Death Valley regional flow system, California and Nevada. United States. doi:10.2172/786301.
Hill, M.C., Ely, D.M., Tiedeman, C.R., O'Brien, G.M., D'Agnese, F.A., and Faunt, C.C. Wed . "Preliminary evaluation of the importance of existing hydraulic-head observation locations to advective-transport predictions, Death Valley regional flow system, California and Nevada". United States. doi:10.2172/786301. https://www.osti.gov/servlets/purl/786301.
@article{osti_786301,
title = {Preliminary evaluation of the importance of existing hydraulic-head observation locations to advective-transport predictions, Death Valley regional flow system, California and Nevada},
author = {Hill, M.C. and Ely, D.M. and Tiedeman, C.R. and O'Brien, G.M. and D'Agnese, F.A. and Faunt, C.C.},
abstractNote = {When a model is calibrated by nonlinear regression, calculated diagnostic statistics and measures of uncertainty provide a wealth of information about many aspects of the system. This report presents a method of ranking the likely importance of existing observation locations using measures of prediction uncertainty. It is suggested that continued monitoring is warranted at more important locations, and unwarranted or less warranted at less important locations. The report develops the methodology and then demonstrates it using the hydraulic-head observation locations of a three-layer model of the Death Valley regional flow system (DVRFS). The predictions of interest are subsurface transport from beneath Yucca Mountain and 14 underground Test Area (UGTA) sites. The advective component of transport is considered because it is the component most affected by the system dynamics represented by the regional-scale model being used. The problem is addressed using the capabilities of the U.S. Geological Survey computer program MODFLOW-2000, with its ADVective-Travel Observation (ADV) Package, and an additional computer program developed for this work.},
doi = {10.2172/786301},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {8}
}

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