Effect of Compound Flooding on Performance of Earthen Levees
Effect of Compound Flooding on Performance of Earthen Levees
复制标题
复合驱对土堤性能的影响
DOI：
10.1061/9780784482797.069
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
AghaKouchak, Amir
中科院分区：
文献类型：
--
作者：
Jasim, Firas H.;Vahedifard, Farshid;Alborzi, Aneseh;Moftakhari, Hamed;AghaKouchak, Amir
保护沿海地区的土堤可能会暴露在由海岸水位、河流流量和降水等多种驱动因素引发的复合洪水中。然而，大多数洪水风险分析一次只考虑一个洪水驱动因素。本文对加州萨克拉门托谢尔曼岛土堤在河流洪水和暴雨洪水复合洪水作用下的性能进行了数值研究。建立了堤防三维应力与流动完全耦合的有限元模型。然后利用有限元模型对不同洪水情况下堤防的水力学响应进行了模拟。对洪峰流量和峰值海平面进行了双变量极值分析，得到了不同情景下的河流洪水过程图，同时考虑了这两个变量之间的相关性。用极端降水的强度-历时-频率(IDF)曲线表征了研究区的洪涝灾害。有限元模型中采用不同重现期的河流洪水和洪涝洪水流态，模拟堤防的水力学响应。结果表明，考虑复合驱后，2年和50年复发期安全系数分别降低8.7%和18.6%。
Earthen levees protecting coastal regions can be exposed to compound flooding induced by multiple drivers such as coastal water level, river discharge, and precipitation. However, the majority of flood hazard analyses consider only one flood driver at a time. This study numerically investigates the performance of an earthen levee in Sherman Island, Sacramento, CA, under compound flooding induced by fluvial and pluvial flooding. A finite element model is built for fully coupled 3D stress-flow simulations of the levee. The finite element model is then used to simulate the hydro-mechanical response of the levee under different flood scenarios. Fluvial flood hydrographs for different scenarios are obtained using a bivariate extreme analysis of peak river discharge and peak ocean level while accounting for the significance of correlation between these two variables. Pluvial flooding is characterized using intensity-duration-frequency (IDF) curves of extreme precipitations for the study area. The fluvial and pluvial flood patterns for different recurrence intervals are used in the finite element model to simulate the hydro-mechanical response of the levee. Results show that considering compound flooding leads to 8.7% and 18.6% reduction in the factor of safety for 2 and 50-year recurrence intervals, respectively.
登录
查看更多内容
气候变化对极端降水条件下土堤脆弱性曲线的影响
DOI：
10.1061/9780784480724.045
发表时间：
2017
期刊：
Geotechnical Special Publication No. 285
影响因子：
--
作者：
Jasim, Firas H.;Vahedifard, Farshid;Ragno, Elisa;AghaKouchak, Amir;Ellithy, Ghada
通讯作者：
Ellithy, Ghada
DOI：
10.1061/(asce)gt.1943-5606.0001743
发表时间：
2017-09
影响因子：
3.9
作者：
F. Vahedifard;F. S. Tehrani;V. Galavi;E. Ragno;A. Aghakouchak
通讯作者：
F. Vahedifard;F. S. Tehrani;V. Galavi;E. Ragno;A. Aghakouchak
概率方法在可持续岩土边坡稳定性分析中的作用
DOI：
--
发表时间：
2014
期刊：
影响因子：
--
作者：
H. Hamedifar;R. Bea;Juan M. Pestana;E. Roe
通讯作者：
E. Roe
干旱威胁着加州的堤坝。
影响因子：
56.9
作者：
F. Vahedifard;A. Aghakouchak;Joe D. Robinson
通讯作者：
Joe D. Robinson
影响因子：
5.2
作者：
Sadegh, Mojtaba;Moftakhari, Hamed;Gupta, Hoshin V.;Ragno, Elisa;Mazdiyasni, Omid;Sanders, Brett;Matthew, Richard;AghaKouchak, Amir
通讯作者：
AghaKouchak, Amir