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Flood modelling improvement using automatic calibration of two dimensional river software SRH-2D

Simon Deslauriers and Tew-Fik Mahdi

Article (2018)

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Abstract

River model calibration is essential for reliable model prediction. The manual calibration method is laborious and time-consuming and requires expert knowledge. River engineering software is now equipped with more complex tools that require a high number of parameters as input, rendering the task of model calibration even more difficult. This paper presents the calibration tool O.P.P.S. (Optimisation Program for PEST and SRH-2D) and then uses it in multiple calibration scenarios. O.P.P.S. combines PEST, a calibration software and SRH-2D, a bi-dimensional hydraulic and sediment model for river systems, into an easy-to-use set of forms. O.P.P.S is designed to minimise the user's interaction with the involved program to carry out rapid and functional calibration processes. PEST uses the Gauss–Marquardt–Levenberg algorithm to adjust the model's parameters by minimising an objective function containing the differences between field observation and model-generated values. The tool is used to conduct multiple calibration series of the modelled Ha! Ha! river in Québec, with varying information content in the observation fields. A sensitivity study is also conducted to assess the behaviour of the calibration process in the presence of erroneous or imprecise measurements.

Uncontrolled Keywords

River modelling; Automatic calibration; Parameter estimation; SRH-2D; PEST

Additional Information: Titre du manuscrit: Automatic calibration of river reach 2D simulations based on SRH-2D
Subjects: 1000 Civil engineering > 1006 Hydrologic engineering
4500 Hydrology > 4500 Hydrology
Department: Department of Civil, Geological and Mining Engineering
Funders: CRSNG/NSERC
Grant number: RGPIN-2016-06413
PolyPublie URL: https://publications.polymtl.ca/5331/
Journal Title: Natural Hazards (vol. 91, no. 2)
Publisher: Springer
DOI: 10.1007/s11069-017-3150-6
Official URL: https://doi.org/10.1007/s11069-017-3150-6
Date Deposited: 30 Jul 2020 09:33
Last Modified: 27 Sep 2024 02:20
Cite in APA 7: Deslauriers, S., & Mahdi, T.-F. (2018). Flood modelling improvement using automatic calibration of two dimensional river software SRH-2D. Natural Hazards, 91(2), 697-715. https://doi.org/10.1007/s11069-017-3150-6

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