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Image Analysis for Determination of Dye Tracer Concentrations in Sand Columns
Author(s) -
Aeby P.,
Forrer J.,
Flühler H.,
Steinmeier C.
Publication year - 1997
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1997.03615995006100010006x
Subject(s) - tracer , digital image analysis , image resolution , soil water , infiltration (hvac) , calibration , environmental science , chemistry , geology , mineralogy , remote sensing , soil science , materials science , artificial intelligence , mathematics , computer science , computer vision , statistics , physics , nuclear physics , composite material
Dye tracers can be used to visualize flow paths in soils. We used digital image analysis to determine the spatial distribution of dye concentrations in a quartz sand column. Color slides and near‐infrared black‐and‐white photographs were taken from a sand column that was cut in halves longitudinally after a point‐source dye infiltration experiment. In a separate calibration experiment, sand samples were prepared with known water content and dye concentration. Photographs of such sample arrays were used as training areas for image analysis. Image analysis is a viable way for obtaining a high spatial resolution of tracer concentrations and provides a quantitative basis for describing different solute mixing regimes.