Reduced order emulation of distributed hydraulic simulation models

Young, Peter C. and Leedal, David and Beven, Keith J. and Szczypta, Camille (2009) Reduced order emulation of distributed hydraulic simulation models. In: 15th Symposium on System Identification, SYSID 2009 - Preprints. UNSPECIFIED, FRA, pp. 1762-1767. ISBN 9783902661470

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Abstract

Water level predictions made with hydraulic models are uncertain and evaluating this uncertainty using Monte Carlo ensemble prediction is computationally very expensive. In this paper we show how a reduced order Dynamic Model Emulator (DME) can be used to reproduce, with high accuracy, the outputs of a large and complex 1-D hydraulic model (HEC- RAS) at specified cross-sections along the Montford to Buildwas reach of the River Severn in the U.K, together with estimates of uncertainty in the predictions. This emulation model is obtained by the application of Dominant Mode Analysis (DMA), involving the identification and estimation of nonlinear State-Dependent Parameter (SDP) transfer function models, using data generated by dynamic experiments conducted on the HEC-RAS model. The paper shows how this 'nominal' DME is able to emulate the distributed hydraulic model for a nominal set of its physically-defined parameters and it presents initial results from a complete DME that emulates the HEC-RAS model over a user-defined region of its parameter space.

Item Type:
Contribution in Book/Report/Proceedings
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2207
Subjects:
ID Code:
128766
Deposited By:
Deposited On:
02 Nov 2018 10:26
Refereed?:
Yes
Published?:
Published
Last Modified:
05 Aug 2020 10:07