NDLI: Groundwater flow modelling within a coastal alluvial plain setting using a high-resolution hydrofacies approach; Bells Creek plain, Australia

Content Provider	Springer Nature Link
Author	Ezzy, T. R. Cox, M. E. O’Rourke, A. J. Huftile, G. J.
Copyright Year	2006
Abstract	Ground penetrating radar (GPR) has proved to be an extremely useful geophysical tool, in conjunction with direct geological data, to develop a realistic, macroscopic, subjective-based conceptual model of aquifer architecture within a shallow coastal alluvial plain. Subsequent finite-difference groundwater modelling has not only enabled determination of the dominant groundwater flow paths for the plain, but has also quantified the effects of within-facies and between-facies sedimentary heterogeneity on those flow paths. The interconnection of narrow, unconfined alluvial channels and a broad, semi-confined alluvial delta is ensuring that most fresh groundwater that enters the plain in the form of precipitation or recharge from lateral bedrock hills, is discharged into the eastern coastal wetlands via that alluvial delta aquifer.Le radar est un instrument géophysique très utile qui, avec les données géologiques permet les réalisations d’un modèle réaliste de la structure des aquifères alluviales côtières peu profondes. A part de la mise en évidence des directions principales d’écoulement, la modélisation par la méthode des différences finies, a permis aussi de quantifier les effets des hétérogénéités des faciès sédimentaires au long des mêmes directions d’écoulement. L’interconnectivité des canaux alluviaux libres avec une delta semi captive assure que la plupart de l’eau douce de la plaine provenant de précipitations or par la recharge du substratum qui affleure dans les collines latérales se décharge dans les marécages côtières á travers de l’aquifère deltaïque.El radar de penetración terrestre (RPT), ha demostrado ser una herramienta geofísica de extremada utilidad, en conjunto con datos geológicos directos, para desarrollar un modelo conceptual de bases subjetivas, macroscópico y práctico, de la arquitectura del acuífero dentro de una llanura aluvial costera somera. La etapa subsiguiente del modelamiento, por diferencias finitas del agua subterránea, no solamente ha facilitado la determinación de las redes de flujo principales del agua subterránea para la llanura, si no también cuantificó los efectos de la heterogeneidad sedimentaria en la red de flujo, denominados de “facies interna” y “entre facies”. La interconexión entre canales aluviales estrechos de tipo libre y el delta aluvial amplio de tipo semiconfinado, está asegurando que mucha del agua subterránea dulce que entra a la llanura, bien sea como precipitación, o bien como recarga lateral desde las colinas rocosas de los alrededores, sea descargada a los humedales costeros orientales por medio del acuífero deltaico aluvial.
Starting Page	675
Ending Page	688
Page Count	14
File Format	PDF
ISSN	14312174
Journal	Hydrogeology Journal
Volume Number	14
Issue Number	5
e-ISSN	14350157
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-03-17
Publisher Institution	International Association of Hydrogeologists
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Groundwater flow Heterogeneity Geophysical methods Numerical modelling Waste Water Technology Water Pollution Control Water Management Aquatic Pollution Hydrogeology Geology
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Water Science and Technology

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