Nonlinear time-series modeling of unconfined groundwater head
TJ Peterson, AW Western
Water Resources Research | AMER GEOPHYSICAL UNION | Published : 2014
This paper presents a nonlinear transfer function noise model for time-series modeling of unconfined groundwater hydrographs. The motivation for its development was that existing groundwater time-series models were unable to simulate large recharge events and multiyear droughts. This was because existing methods do not partition rainfall to runoff and do not account for nonlinear soil water drainage. To account for these nonlinear processes, a vertically integrated soil moisture module was added to an existing transfer function noise model. The soil moisture module has a highly flexible structure that allowed 84 different forms to be built. Application of the time-series model requires numer..View full abstract
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Awarded by Australian Research Council
The authors are grateful for the financial support provided by the Australian Research Council (grants LP0991280 and LP130100958), the Department of Environment and Primary Industries, Victoria, Australia; and the Bureau of Meteorology, Australia. The authors also thank Vahid Shapoori and Lionel Siriwardena of the University of Melbourne for the their testing of the models. Lastly, the source code and example input data are available as supporting information and the latest version of the code is available at https://github.com/peterson-tim-j/Groundwater-Statistics-Toolbox.