气候变化领域集成服务门户(CCPortal): Implementation and evaluation of coupled discontinuous Galerkin methods for simulating overtopping of flood defenses by storm waves

CCPortal

DOI	10.1016/j.advwatres.2019.103501
	Implementation and evaluation of coupled discontinuous Galerkin methods for simulating overtopping of flood defenses by storm waves
	Wood D.; Kubatko E.J.; Rahimi M.; Shafieezadeh A.; Conroy C.J.
发表日期	2020
ISSN	0309-1708
卷号	136
英文摘要	In coastal regions, accurate prediction of the inundation risks posed by tropical cyclones and other severe weather is key to mitigating disaster impacts. Predictions of these risks are often provided by numerical models; however, these models also frequently do not consider inundation due to wind-sea wave run-up. Neglecting such effects may be misleading for evaluating the risks posed to areas protected by flood defense systems such as levees and dykes. To effectively evaluate the flooding risks posed by storm waves, accurate wind-sea modeling should be undertaken in parallel with storm surge modeling, and accurate wave-overtopping flow rates at flood barriers must be prescribed based on the modeled sea conditions and structure geometries. To this end, we present development of a loosely coupled finite element based shallow-water equations and parametric spectral wave model. Wave-overtopping flow rates are computed by formulas provided in the guidance of the EurOtop manual. We demonstrate that the parametric spectral wave modeling approach is sufficiently accurate for modeling of wave-overtopping events, despite its simplifying assumptions, such as those based on deep water (e.g., discounting foreshore effects such as wave shoaling and breaking), and disregarding internal forces due to wave breaking and turbulence, as opposed to more commonly used discrete (third generation) spectral wave models, which provide more detailed descriptions of wave fields but are much more computationally expensive. Comparisons of numerically modeled wave-overtopping flow rates with measurements from the CLASH database show good agreement by linear regression (slope: 0.9911, R2: 0.9584) for more than 90% of the test cases considered, where for the relatively few outlier cases the model performs poorly due to either uncertainties in the EurOtop guidance or the lack of foreshore effects in the wave model. © 2019 Elsevier Ltd
关键词	Equations of motion Flood control Floods Flow rate Storms Uncertainty analysis Water waves Accurate prediction Discontinuous Galerkin methods Shallow water equations Simplifying assumptions Spectral wave models Structure geometry Wave overtoppings Wave shoaling and breaking Galerkin methods
语种	英语
来源机构	Advances in Water Resources
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/131860
推荐引用方式 GB/T 7714	Wood D.,Kubatko E.J.,Rahimi M.,et al. Implementation and evaluation of coupled discontinuous Galerkin methods for simulating overtopping of flood defenses by storm waves[J]. Advances in Water Resources,2020,136.
APA	Wood D.,Kubatko E.J.,Rahimi M.,Shafieezadeh A.,&Conroy C.J..(2020).Implementation and evaluation of coupled discontinuous Galerkin methods for simulating overtopping of flood defenses by storm waves.,136.
MLA	Wood D.,et al."Implementation and evaluation of coupled discontinuous Galerkin methods for simulating overtopping of flood defenses by storm waves".136(2020).