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Multivariate Analysis of Groundwater-Quality Time-Series Using Self-organizing Maps and Sammon’s Mapping

Page, Rebeccca M. and Lischeid, Gunnar and Huggenberger, Peter. (2015) Multivariate Analysis of Groundwater-Quality Time-Series Using Self-organizing Maps and Sammon’s Mapping. Water resources management, Vol. 29, H. 11. pp. 3957-3970.

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Official URL: http://edoc.unibas.ch/dok/A6428745

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Abstract

Groundwater extracted from alluvial aquifers close to rivers is vulnerable to contamination by infiltrating river water. Infiltration is often increased during high discharge events, when the levels of waterborne pathogens are also increased. Water suppliers with low-level treatment thus relyon alternative measures derived from information on system state to manage the resource and maintain drinking-water quality. In this study, a combination of Self-Organizing Maps and Sammon’s Mapping (SOM-SM) was used as a proxy analysis of a multivariate time-series to detect critical system states whereby contamination of the drinking water extraction wells is imminent. Groundwater head, temperature and electrical conductivity time-series from groundwater observation wells were analysed using the SOM-SM method. Independent measurements (spectral absorption coefficient, turbidity, particle density and river stage) were used. This approach can identify critical system states and can be integrated into an adaptive, online, automated groundwater-management process. Groundwater extracted from alluvial aquifers close to rivers is vulnerable tocontamination by infiltrating river water. Infiltration is often increased during highdischarge events, when the levels of waterborne pathogens are also increased. Watersuppliers with low-level treatment thus relyon alternative measures derived from information on system state to manage the resource and maintain drinking-water quality. Inthis study, a combination of Self-Organizing Maps and Sammon’s Mapping (SOM-SM)was used as a proxy analysis of a multivariate time-series to detect critical system stateswhereby contamination of the drinking water extraction wells is imminent. Groundwaterhead, temperature and electrical conductivity time-series from groundwater observationwells were analysed using the SOM-SM method. Independent measurements (spectralabsorption coefficient, turbidity, particle density and river stage) were used. This approach can identify critical system states and can be integrated into an adaptive, online,automated groundwater-management process.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Geologie-Paläontologie > Applied Geology (Huggenberger)
UniBasel Contributors:Huggenberger, Peter and Page, Rebecca M.
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Kluwer
ISSN:0920-4741
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:02 Oct 2015 10:01
Deposited On:02 Oct 2015 10:01

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