Abstract #302099

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JSM 2003 Abstract #302099
Activity Number: 475
Type: Contributed
Date/Time: Thursday, August 7, 2003 : 10:30 AM to 12:20 PM
Sponsor: Section on Statistical Computing
Abstract - #302099
Title: A Computational Geometric Approach for Comparing Stiff Diagrams of Chemical Compositions of Groundwaters
Author(s): Ashok K. Singh*+ and Irene Farnham and Laxmi Gewali and David Hansen
Companies: University of Las Vegas and University of Nevada, Las Vegas and University of Las Vegas and University of Las Vegas
Address: Mathematical Sciences, Las Vegas, NV, 89154-4020,
Keywords: similarity index ; simulation ; groundwater flow ; major-ion composition
Abstract:

Stiff diagrams are commonly used for displaying major-ion compositions of groundwaters. The shape of the diagram indicates the relative proportion of different ions and the size indicates total concentrations. Similarities within the chemistry of groundwaters collected from different locations can then be determined and groundwaters with similar flow histories identified. Comparing similarity between polygonal shapes is a well-known problem in computational geometry, with applications in character recognition and computer vision. We consider the application of this technique for developing a shape-similarity index for stiff diagrams. We will present results obtained by executing shape-similarity algorithms on major-ion concentrations in groundwaters collected from southern Nevada. Preliminary results show that the proposed technique is useful in comparing stiff diagrams.

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