Estimating errors in concentration measurements obtained from image analysis

R. R. Goswami, Bharath Ambale Venkatesh, T. P. Clement

Research output: Contribution to journalArticle

Abstract

Image analysis (IA) techniques are increasingly being used in porous media experiments to measure system properties such as concentration and water content. The values of system properties estimated using IA techniques can be influenced by various types of experimental errors. These errors are generally quantified by using global mass balance calculations or by comparing the dispersion coefficient value obtained from the IA data against an accepted value. We used a theoretical test problem to show that both of these error quantification methods have severe limitations. Hence, we developed an alternative statistics-based method for quantifying IA errors. The applicability of the new method was verified using the theoretical test problem. In addition to quantifying errors, the method can also be used as a design tool for selecting optimal concentration ranges for conducting contaminant transport experiments with minimal errors. We conducted a dense-tracer transport experiment to demonstrate the use of the proposed error analysis method.

Original languageEnglish (US)
Pages (from-to)108-118
Number of pages11
JournalVadose Zone Journal
Volume8
Issue number1
DOIs
StatePublished - Feb 2009
Externally publishedYes

Fingerprint

image analysis
methodology
experiment
error analysis
pollutant transport
porous medium
mass balance
porous media
tracer
water content
method
tracer techniques
statistics
testing
test

ASJC Scopus subject areas

  • Soil Science

Cite this

Estimating errors in concentration measurements obtained from image analysis. / Goswami, R. R.; Ambale Venkatesh, Bharath; Clement, T. P.

In: Vadose Zone Journal, Vol. 8, No. 1, 02.2009, p. 108-118.

Research output: Contribution to journalArticle

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