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Standardized Schoeller Diagrams with Matlab - The Plotting Tool
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Date
2022-05-25
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Water analyses typically result in numerous characteristic values. The bunch
of parameters hamper temporal or spatial comparisons of different samples. In
order to facilitate the evaluation and interpretation of hydrochemical data,
hydrogeologists use various special diagrams. One of them is the Schoeller
diagram, in which the concentrations of different chemical species are plotted
on logarithmic scales. Entries of an analysis are connected and form a
characteristic signature. In the Schoeller diagram, parallel or subparallel
signatures indicate relatedness of waters. Here we present the idea of
standardized Schoeller diagrams: different logarithmic axes are shifted with
respect to each other so that the signatures of a selectable sample forms a
straight line.
For this application, we have developed a plot tool that allows standardized
Schoeller diagrams, such as the example above, to be plotted with minimal
effort and only one command in the Matlab programming environment. All
required files, including the program code of the plot command, a detailed
tutorial, as well as sample commands for all plots of the tutorial can be
found in this collection:
User manual: Standardized Schoeller Diagrams with Matlab - A User Manual.pdf
Main code file: plotSchoeller.m
Example commands of all figures in the manual: createAllFigures.m
Example dataset used in the manual: ExampleDataSet.xlsx
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Except where otherwise noted, this license is described as CC BY 4.0 - Attribution 4.0 International