Regional-scale, fully coupled modelling of stream-aquifer interaction in a tropical catchment

Werner, Adrian D., Gallagher, Mark R. and Weeks, Scott W. (2006) Regional-scale, fully coupled modelling of stream-aquifer interaction in a tropical catchment. Journal Of Hydrology, 328 3-4: 497-510. doi:10.1016/j.jhydrol.2005.12.034

Author Werner, Adrian D.
Gallagher, Mark R.
Weeks, Scott W.
Title Regional-scale, fully coupled modelling of stream-aquifer interaction in a tropical catchment
Journal name Journal Of Hydrology   Check publisher's open access policy
ISSN 0022-1694
Publication date 2006
Sub-type Article (original research)
DOI 10.1016/j.jhydrol.2005.12.034
Volume 328
Issue 3-4
Start page 497
End page 510
Total pages 14
Editor C. Neal
M. Sophocleous
R. Krzysztofowicz
Place of publication Amsterdam
Publisher Elsevier Science Bv
Collection year 2006
Language eng
Subject C1
290800 Civil Engineering
770602 Land and water management
Abstract The planning and management of water resources in the Pioneer Valley, north-eastern Australia requires a tool for assessing the impact of groundwater and stream abstractions on water supply reliabilities and environmental flows in Sandy Creek (the main surface water system studied). Consequently, a fully coupled stream-aquifer model has been constructed using the code MODHMS, calibrated to near-stream observations of watertable behaviour and multiple components of gauged stream flow. This model has been tested using other methods of estimation, including stream depletion analysis and radon isotope tracer sampling. The coarseness of spatial discretisation, which is required for practical reasons of computational efficiency, limits the model's capacity to simulate small-scale processes (e.g., near-stream groundwater pumping, bank storage effects), and alternative approaches are required to complement the model's range of applicability. Model predictions of groundwater influx to Sandy Creek are compared with baseflow estimates from three different hydrograph separation techniques, which were found to be unable to reflect the dynamics of Sandy Creek stream-aquifer interactions. The model was also used to infer changes in the water balance of the system caused by historical land use change. This led to constraints on the recharge distribution which can be implemented to improve model calibration performance. (c) 2006 Elsevier B.V. All rights reserved.
Keyword groundwater
surface water
numerical models
basin management
coastal aquifers
Bank Storage
Recession Analysis
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
2007 Higher Education Research Data Collection
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Citation counts: TR Web of Science Citation Count  Cited 33 times in Thomson Reuters Web of Science Article | Citations
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Created: Wed, 15 Aug 2007, 09:10:14 EST