Author(s): S. Rusca; J. P. Carbajal

Linked Author(s):

Keywords: Early flood warning; Catchment specific emulator; Non-linear shallow water equations; Surrogate model

Abstract: We present a catchment specific emulator based on non-linear shallow water equations to be used for early flood warning system in real time. Floods due to heavy rain are among the most destructive events in hydrology and their frequency has incremented over the last decades. Numerical models are useful tools to predict floods and trigger security measures or evacuations. However, the high computation demands of these models hinders their use in real time early warning systems. Fine tuned shallow water based simulators are able to produce trustworthy flood predictions but are unusable as early warning systems due to their high computational cost. Early warning systems should be capable of quickly providing a prediction of whether, based on current conditions and meteorological forecast, an occurring rain event will result in major flooding or not, and if yes within how much time. Fast surrogate models based on detailed simulators can provide accurate results with speed-up factors of up to 10^6. In this work, we present the development of a surrogate model of a detailed simulator using FullSWOF_2D-v.1.07.00 (non-linear shallow water equations).

DOI: https://doi.org/10.3850/978-981-11-2731-1_337-cd

Year: 2018