Modeling the effect of uncertainties in rainfall characteristics on flash flood warning based on rainfall thresholds

SJ Wu, CT Hsu, HC Lien, CH Chang - Natural Hazards, 2015 - Springer
This study proposes a risk assessment framework for quantifying the reliability of the rainfall
threshold used in flash flood warning, which should be influenced by the uncertainties in the …

Iterative explicit simulation of 1D surges and dam‐break flows

CT Hsu, KC Yeh - … journal for numerical methods in fluids, 2002 - Wiley Online Library
The one-dimensional Saint Venant equations for shallow-water ows are used to simulate the
ood wave resulting from the sudden opening (or closure) of a gate or collapse of a dam. An …

Variation of uncertainty of drainage density in flood hazard mapping assessment with coupled 1D–2D hydrodynamics model

SY Yang, CH Chang, CT Hsu, SJ Wu - Natural Hazards, 2022 - Springer
Coupled 1D–2D hydrodynamic models are widely utilized in flood hazard mapping. Previous
studies adopted conceptual hydrological models or 1D hydrodynamic models to evaluate …

A case study for the application of an operational two-dimensional real-time flooding forecasting system and smart water level gauges on roads in Tainan City, Taiwan

CH Chang, MK Chung, SY Yang, CT Hsu, SJ Wu - Water, 2018 - mdpi.com
An operational two-dimensional real-time flood forecasting system has been developed to
prevent urban inundation in Taiwan, and it uses the Delft-FEWS (Flood Early Warning System…

[HTML][HTML] Modeling GA-derived optimization analysis for canal-based irrigation water allocation under variations in runoff-related and irrigation-related factors

SJ Wu, HY Yang, CH Chang, CT Hsu - Agricultural Water Management, 2023 - Elsevier
This study proposes an optimal analysis model for carrying out the canal-based irrigation
water allocation (OPA_IWA_Canal) for a schedule-based irrigation zone under consideration …

Stochastic modeling of artificial neural networks for real-time hydrological forecasts based on uncertainties in transfer functions and ANN weights

SJ Wu, CT Hsu, CH Chang - Hydrology Research, 2021 - iwaponline.com
This study proposes a stochastic artificial neural network (named ANN_GA-SA_MTF), in which
the parameters of the multiple transfer functions considered are calibrated by the modified …

Real-time correction of water stage forecast using combination of forecasted errors by time series models and Kalman filter method

JC Shen, CH Chang, SJ Wu, CT Hsu… - … research and risk …, 2015 - Springer
This study modifies a real-time correction method for water stage forecasts (named the
RTEC_TS&KF model) using the time series method developed by Wu et al. (Stoch Environ Res …

Modeling of uncertainty for flood wave propagation induced by variations in initial and boundary conditions using expectation operator on explicit numerical solutions

SJ Wu, CT Hsu - … Journal for Numerical Methods in Engineering, 2018 - Wiley Online Library
This study proposes a framework for uncertainty analysis by incorporating explicit numerical
solutions of governing equations for flood wave propagation with the expectation operator. It …

Long-term temporal flood predictions made using convolutional neural networks

HW Wang, GF Lin, CT Hsu, SJ Wu, SS Tfwala - Water, 2022 - mdpi.com
This study proposes a method for predicting the long-term temporal two-dimensional range
and depth of flooding in all grid points by using a convolutional neural network (CNN). The …

Real-time error correction of two-dimensional flood-inundation simulations during rainstorm events

SJ Wu, CH Chang, CT Hsu - Stochastic Environmental Research and Risk …, 2020 - Springer
This study develops a real-time error correction model named RTEC_2DIS for two-dimensional
(2D) flood-inundation simulations. Inundation depth and flooding area provided by a 2D …