Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR025583 |
Real‐time flood forecasting based on a high‐performance 2D hydrodynamic model and numerical weather predictions | |
Xiaodong Ming; Qiuhua Liang; Xilin Xia; Dingmin Li; Hayley J. Fowler | |
2020-05-17 | |
发表期刊 | Water Resources Research
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出版年 | 2020 |
英文摘要 | A flood forecasting system commonly consists of at least two essential components, i.e., a numerical weather prediction (NWP) model to provide rainfall forecasts and a hydrological/hydraulic model to predict the hydrological response. Whilst being widely used for flood forecasting, hydrological models only provide a simplified representation of the physical processes of flooding due to negligence of strict momentum conservation. They cannot reliably predict the highly transient flooding process from intense rainfall, in which case a fully 2D hydrodynamic model is required. Due to high computational demand, hydrodynamic models have not been exploited to support real‐time flood forecasting across a large catchment at sufficiently high resolution. To fill the current research and practical gaps, this work develops a new forecasting system by coupling a graphics processing unit (GPU) accelerated hydrodynamic model with NWP products to provide high‐resolution, catchment‐scale forecasting of rainfall‐runoff and flooding processes induced by intense rainfall. The performance of this new forecasting system is tested and confirmed by applying it to ‘forecast’ an extreme flood event across a 2,500 km2 catchment at 10 m resolution. Quantitative comparisons are made between the numerical predictions and field measurements in terms of water level and flood extent. To produce simulation results comparing well with the observations, the new flood forecasting system provides 34 hours of lead time when the weather forecasts are available 36 hours beforehand. Numerical experiments further confirm that uncertainties from the rainfall inputs are not amplified by the hydrodynamic model towards the final flood forecasting outputs in this case. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/267627 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Xiaodong Ming,Qiuhua Liang,Xilin Xia,等. Real‐time flood forecasting based on a high‐performance 2D hydrodynamic model and numerical weather predictions[J]. Water Resources Research,2020. |
APA | Xiaodong Ming,Qiuhua Liang,Xilin Xia,Dingmin Li,&Hayley J. Fowler.(2020).Real‐time flood forecasting based on a high‐performance 2D hydrodynamic model and numerical weather predictions.Water Resources Research. |
MLA | Xiaodong Ming,et al."Real‐time flood forecasting based on a high‐performance 2D hydrodynamic model and numerical weather predictions".Water Resources Research (2020). |
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