当前位置: X-MOL 学术J Am Water Resour Assoc › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Effect of Model Setup Complexity on Flood Modeling in Low‐Gradient Basins
Journal of the American Water Resources Association ( IF 2.6 ) Pub Date : 2020-10-20 , DOI: 10.1111/1752-1688.12884
Haitham A. Saad 1 , Emad H. Habib 1 , Robert L. Miller 1
Affiliation  

The flat topography, large natural storage features, backwater effects, and boundary conditions all play different roles in the flood response of rivers in low‐gradient environments. The combined effects of these factors result in frequent episodes of reverse flows, slow recession of flood waters, and complex flow interactions. This study investigates the value of varying degrees of model complexity and setup features on the model ability to reproduce some of the unique flooding characteristics in low‐gradient basins. The study focuses on (1) effect of streamflow routing techniques; (2) effect of incorporating large natural storage areas; (3) effect of model dimensionality; and (4) effect of downstream boundary conditions. The study assessed six different model setups for the Vermilion River in south Louisiana, during a series of flood‐inducing storm events in May–June 2014. A successful simulation of the repetitive reverse flows in the river was only possible after incorporating the large swamp areas within the basin. The slow recession of the flood peaks was accurately reproduced with the use of a two‐dimensional representation in characterizing the swamp areas. The results of this study have implications for understanding flood dynamics in low‐gradient basins, and for guiding the development of reliable flood models that take advantage of available technologies and information without adding unwarranted complexities that require extensive, yet typically unavailable calibration data.

中文翻译:

模型设置复杂度对低坡度盆地洪水建模的影响

平坦的地形,巨大的自然存储特征,回水效应和边界条件在低坡度环境下的河流洪水响应中都发挥着不同的作用。这些因素的综合作用导致回流频繁发生,洪水缓慢退缩以及复杂的水流相互作用。这项研究调查了不同程度的模型复杂性和设置特征对重现低梯度盆地某些独特洪水特征的模型能力的价值。研究的重点是(1)流路由技术的效果;(2)合并大型自然存储区的效果;(3)模型维数的影响;(4)下游边界条件的影响。这项研究评估了路易斯安那州南部朱红河的六种不同模型,在2014年5月至6月发生的一系列引发洪水的暴风雨事件中。只有在将流域内的大沼泽地区纳入考量之后,才能成功模拟河流中的反复逆流。在表征沼泽区时,使用二维表示准确地再现了洪峰的缓慢衰退。这项研究的结果对于理解低梯度盆地的洪水动态,指导开发可利用现有技术和信息的可靠洪水模型而不会增加不必要的复杂性(需要大量但通常不可用的校准数据)具有指导意义。只有将流域内的大片沼泽地区纳入考虑范围,才有可能成功模拟河流中的重复逆流。在表征沼泽区时,使用二维表示准确地再现了洪峰的缓慢衰退。这项研究的结果对于理解低梯度盆地的洪水动态,指导开发可利用现有技术和信息的可靠洪水模型而不会增加不必要的复杂性(需要大量但通常不可用的校准数据)具有指导意义。只有将流域内的大片沼泽地区纳入考虑范围,才有可能成功模拟河流中的重复逆流。在表征沼泽区时,使用二维表示准确地再现了洪峰的缓慢衰退。这项研究的结果对于理解低梯度盆地的洪水动态,指导开发可利用现有技术和信息的可靠洪水模型而不会增加不必要的复杂性(需要大量但通常不可用的校准数据)具有指导意义。
更新日期:2020-10-20
down
wechat
bug