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Extreme Water Level Simulation and Component Analysis in Delaware Estuary during Hurricane Isabel
Journal of the American Water Resources Association ( IF 2.4 ) Pub Date : 2021-07-15 , DOI: 10.1111/1752-1688.12947
Dongxiao Yin 1 , David F. Muñoz 2 , Roham Bakhtyar 3, 4 , Z. George Xue 1, 5, 6 , Hamed Moftakhari 2 , Celso Ferreira 7 , Kyle Mandli 8
Affiliation  

Sea level rise and intense hurricane events make the East and Gulf Coasts of the United States increasingly vulnerable to flooding, which necessitates the development of computational models for accurate water level simulation in these areas to safeguard the coastal wellbeing. With this regard, a model framework for water level simulation over coastal transition zone during hurricane events is built in this study. The model takes advantage of the National Water Model’s strength in simulating rainfall–runoff process, and D-Flow Flexible Mesh’s ability to support unstructured grid in hydrodynamic processes simulation with storm surges/tides information from the Advanced CIRCulation model. We apply the model on the Delaware Estuary to simulate extreme water level and to investigate the contribution of different physical components to it during Hurricane Isabel (2003). The model shows satisfactory performance with an average Willmott skill of 0.965. Model results suggest that storm surge is the most dominating component of extreme water level with an average contribution of 78.16%, second by the astronomical tide with 19.52%. While the contribution of rivers is mainly restricted to the upper part of the estuary upstream of Schuylkill River, local wind-induced water level is more pronounced with values larger than 0.2 m over most part of the estuary.

中文翻译:

伊莎贝尔飓风期间特拉华河口极端水位模拟与成分分析

海平面上升和强烈的飓风事件使美国东部和墨西哥湾沿岸越来越容易受到洪水的侵袭,这就需要开发计算模型以在这些地区进行准确的水位模拟,以保障沿海地区的福祉。为此,本研究建立了飓风事件期间沿海过渡带水位模拟的模型框架。该模型利用了国家水模型在模拟降雨-径流过程方面的优势,以及 D-Flow Flexible Mesh 在水动力过程模拟中支持非结构化网格的能力,以及来自 Advanced CIRCulation 模型的风暴潮/潮汐信息。我们将模型应用于特拉华河口,以模拟极端水位,并研究飓风伊莎贝尔(2003 年)期间不同物理成分对其的贡献。该模型表现出令人满意的性能,平均 Willmott 技能为 0.965。模型结果表明,风暴潮是极端水位最主要的组成部分,平均贡献78.16%,其次是天文潮,贡献19.52%。虽然河流的贡献主要局限于 Schuylkill 河上游的河口上游,但局部风致水位更为明显,河口大部分地区大于 0.2 m。模型结果表明,风暴潮是极端水位最主要的组成部分,平均贡献78.16%,其次是天文潮,贡献19.52%。虽然河流的贡献主要局限于 Schuylkill 河上游的河口上游,但局部风致水位更为明显,河口大部分地区大于 0.2 m。模型结果表明,风暴潮是极端水位最主要的组成部分,平均贡献78.16%,其次是天文潮,贡献19.52%。虽然河流的贡献主要局限于 Schuylkill 河上游的河口上游,但局部风致水位更为明显,河口大部分地区大于 0.2 m。
更新日期:2021-07-15
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