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Network design factors for assessing temporal variability in ground-water quality. Interim report, May 1985-July 1988
Barcelona, M.J. ; Lettenmaier, D.P. ; Schock, M.R.
United States 1989
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Título:
Network design factors for assessing temporal variability in ground-water quality. Interim report, May 1985-July 1988
Autor:
Barcelona, M.J.
;
Lettenmaier, D.P.
;
Schock, M.R.
Assuntos:
CHARGED PARTICLES
;
CONTROL
;
DESIGN
;
DOCUMENT TYPES
;
ENVIRONMENTAL QUALITY
;
ENVIRONMENTAL SCIENCES
;
ENVIRONMENTAL TRANSPORT
;
GROUND WATER
;
HYDROGEN COMPOUNDS
;
IONS
;
MANAGEMENT
;
MASS TRANSFER
;
MATHEMATICS
;
MEASURING INSTRUMENTS
;
MONITORS
;
NUTRIENTS
;
OXYGEN COMPOUNDS
;
PROGRESS REPORT
;
QUALITY ASSURANCE
;
QUALITY CONTROL
;
RADIATION DOSE DISTRIBUTIONS
;
SAMPLING
;
SEASONAL VARIATIONS
;
TEMPORAL DOSE DISTRIBUTIONS
;
TIME-SERIES ANALYSIS
;
VARIATIONS
;
WASTE DISPOSAL
;
WASTE MANAGEMENT
;
WATER 540320 -- Environment, Aquatic-- Chemicals Monitoring & Transport-- (1990-)
;
WATER POLLUTION MONITORS
;
WATER QUALITY
Notas:
None
PB-89-236434/XAB
Descrição:
Benchmark major ions and nutrients data were collected biweekly for about two years at 12 wells at two sites in a shallow sand and gravel aquifer in west-central Illinois. The purpose of the study was to explore the time series properties of ground-water-quality data collected at a relatively high sampling frequency. A secondary purpose was to determine the relative magnitudes of natural and sampling-related sources of variance in ground-water quality time series. The absence of this kind of information has severely hindered the design of ground-water sampling programs in the past. Results suggest that, for the wells sampled, sampling frequencies much higher than monthly can result in considerable loss of information, and may not be cost effective. Care was taken in the design of the field and laboratory sampling protocol to minimize the effects of measurement error. The data analysis confirmed that this goal was accomplished. In most cases considerably less than 5% of the total variability could be attributed to sampling and analytical error. Because of the relatively short duration of the study (42 biweekly sampling occasions at most wells) it was not possible to identify the magnitude of seasonal variations reliably.
Editor:
United States
Data de criação/publicação:
1989
Idioma:
Inglês
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