A two-dimensional model of hydraulic performance of stormwater infiltration systems

Browne, D, Deletic, A, Mudd, G and Fletcher, T 2013, 'A two-dimensional model of hydraulic performance of stormwater infiltration systems', Hydrological Processes, vol. 27, no. 19, pp. 2785-2799.


Document type: Journal Article
Collection: Journal Articles

Title A two-dimensional model of hydraulic performance of stormwater infiltration systems
Author(s) Browne, D
Deletic, A
Mudd, G
Fletcher, T
Year 2013
Journal name Hydrological Processes
Volume number 27
Issue number 19
Start page 2785
End page 2799
Total pages 15
Publisher John Wiley and Sons
Abstract Stormwater infiltration systems are a popular method for urban stormwater control. They are often designed using an assumption of one-dimensional saturated outflow, although this is not very accurate for many typical designs where two-dimensional (2D) flows into unsaturated soils occur. Available 2D variably saturated flow models are not commonly used for design because of their complexity and difficulties with the required boundary conditions. A purpose-built stormwater infiltration system model was thus developed for the simulation of 2D flow from a porous storage. The model combines a soil moisture-based model for unsaturated soils with a ponded storage model and uses a wetting front-tracking approach for saturated flows. The model represents the main physical processes while minimizing input data requirements. The model was calibrated and validated using data from laboratory 2D stormwater infiltration trench experiments. Calibrations were undertaken using five different combinations of calibration data to examine calibration data requirements. It was found that storage water levels could be satisfactorily predicted using parameters calibrated with either data from laboratory soils tests or observed water level data, whereas the prediction of soil moistures was improved through the addition of observed soil moisture data to the calibration data set.
Subject Water Resources Engineering
Environmental Engineering not elsewhere classified
Keyword(s) Groundwater/surface water interaction
Infiltration
Model calibration
Numerical approximation and analysis
Stormwater infiltration system
Unsaturated flow
DOI - identifier 10.1002/hyp.9373
Copyright notice © 2012 John Wiley and Sons, Ltd.
ISSN 0885-6087
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