Ensemble assessment and gridded surface response
- Engineers Australia
- Publication Type:
- Conference Proceeding
- Hydrology and Water Resources Symposium (HWRS 2018): Water and Communities, 2018, pp. 735 - 748
- Issue Date:
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The revision of Australian Rainfall and Runoff (ARR, Ball et al, 2016) in 2016 has developed new design flood inputs and recommends the use of an ensemble of ten temporal patterns to replace the average variability method (AVM) patterns. The separation of hydrologic and hydraulic routing is often blurred in urban hydraulic modelling which engenders complicated decisions around the use of hydrologic inputs and their interaction with the hydraulic model. This paper builds upon a case study of the Woolloomooloo catchment in Sydney into the application of new hydrologic inputs developed with ARR 2016 by investigating how the use of ensemble temporal patterns specifically affects the performance of the hydraulic model. Overall, the results of this investigation will contribute to increased understanding of the performance of hydraulic models in urban catchments under different modelling approaches. The investigation will also elucidate the interaction of the temporal pattern with the 1D network within the 2D TUFLOW, impacting the outcomes of urban studies that use ARR 2016 hydrologic inputs.
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