NDLI: Inverse groundwater modelling in the Willunga Basin, South Australia

Content Provider	Springer Nature Link
Author	Kwles, Ian Teubner, Michael Yan, Aimin Rasser, Paul Lee, Jong Wook
Copyright Year	2007
Abstract	A new inverse technique for modelling groundwater flow, based on a functional minimization technique, has been used to calibrate a groundwater flow model of a subregion of the Port Willunga aquifer within the Willunga Basin in South Australia. The Willunga Basin is the location of extensive viticulture, irrigated primarily by groundwater, the levels and quality of which have declined significantly over the last 40 years. The new method is able to generate estimates of transmissivity, storativity and groundwater recharge over the whole subregion as a time-varying continuous surface; previous methods estimate local discrete parameter values at specific times. The new method has also been shown to produce accurate head values for the subregion and very good estimates of groundwater recharge. Its ultimate goal will be to provide a new and invaluable tool for significantly improved groundwater resource management.Une nouvelle méthode inverse de modélisation des écoulements souterrains, basée sur une technique de minimisation fonctionnelle, a été utilisée dans le but de calibrer le modèle d’écoulements souterrains d’une sous-région de l’aquifère de Port Willunga, au sein du Bassin de Willunga au sud de l’Australie. Le Bassin de Willunga est le siège d’une viticulture extensive, initialement irriguée par les eaux souterraines, dont les niveaux et la qualité se sont considérablement dégradés au cours des quarante dernière années. La nouvelle méthode est capable de fournir des estimations de la transmissivité, du coefficient d’emmagasinement et de la réalimentation sur l’ensemble de la sous-région comme une surface continue variant dans le temps, alors que les méthodes précédentes estiment les paramètres discrets locaux à des temps spécifiques. Il a également été démontré que la nouvelle méthode produit des valeurs exactes de charge hydraulique sur la sous-région, ainsi que de bonnes estimations de la réalimentation. Son but final sera de produire un outil nouveau et inestimable pour améliorer significativement la gestion des ressources en eaux souterraines.Para calibrar el modelo flujo de agua subterránea en la subregión del acuífero de Port Willunga, dentro de la Cuenca Willunga, en Australia del Sur, se ha utilizado una nueva técnica de modelación inversa, basada en una técnica de minimización funcional. La cuenca Willunga se dedica a la viticultura extensiva, fundamentalmente bajo riego de aguas subterráneas, de forma que los niveles piezométricos y la calidad del agua han descendido significativamente en los últimos 40 años. El nuevo método es capaz de generar estimaciones de Transmisividad, coeficiente de almacenamiento y recarga en toda la subregión como una superficie variable en el tiempo; los métodos previos estiman valores de parámetros discretos en tiempos específicos. El nuevo método se ha utilizado para producir valores precisos de niveles para la subregión y muy buenas estimaciones de la recarga del agua subterránea. Su objetivo final será proporcionar una nueva e inapreciable herramienta para mejorar significativamente la gestión de los recursos de aguas subterráneas.
Starting Page	1107
Ending Page	1118
Page Count	12
File Format	PDF
ISSN	14312174
Journal	Hydrogeology Journal
Volume Number	15
Issue Number	6
e-ISSN	14350157
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-05-22
Publisher Institution	International Association of Hydrogeologists
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Groundwater flow Inverse modelling Numerical modelling Parameter estimation Willunga Basin Waste Water Technology Water Pollution Control Water Management Aquatic Pollution Geology Hydrogeology
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Water Science and Technology

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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