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首页> 外文期刊>Environmental Geology >Coupling HEC-RAS and HEC-HMS in rainfall-runoff modeling and evaluating floodplain inundation maps in arid environments: case study of Ain Sefra city, Ksour Mountain. SW of Algeria
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Coupling HEC-RAS and HEC-HMS in rainfall-runoff modeling and evaluating floodplain inundation maps in arid environments: case study of Ain Sefra city, Ksour Mountain. SW of Algeria

机译：HEC-RAS和HEC-HMS在降雨径流建模中的耦合以及在干旱环境中评估洪泛区淹没图的研究：以Ksour Mountain Ain Sefra市为例。

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Ain Sefra watershed is located in the south-west of Algeria that has an area of 1957 km(2). In its downstream part located Ain Sefra city where wadi Ain Sefra (junction of wadi Breidj and Tirkount) takes place. It crosses the completely urbanized areas where it was liable to many inundations causing lots of losses either economic or loss of life, these damages resulted from growth population and the spreading of the city over the natural space of this wadi. In this paper, the methodological approach adopted, focused on the hydrologic modeling through the Hydrologic Engineering Center's Hydrologic Modeling System and the hydraulic modeling under the Hydrologic Engineering Center's River Analysis System with combination of Watershed Modeling System model and Geographic Information System. The aim of this study is to analyze the inundation behavior of Ain Sefra city during extreme flood events by considering concrete retaining walls existence built by local authorities and without it. In this case, three types of simulation are performed with the return periods of 10, 100, and 1000 years. The hydraulic modeling revealed that the existence of retaining walls resulted in decrease of flood zone area, and so much less lands are endangered by floods, so that damages of flood at the study area decrease clearly, but they still been insufficient for all return periods. The simulations also highlighted that the region most affected by the flood is the downtown area. Finally, a protection concept is proposed to ensure a better passage of floods in Ain Sefra city, to reduce the risk and to protect the city against the floods.
机译：艾因塞夫拉（Ain Sefra）分水岭位于阿尔及利亚的西南部，面积1957 km（2）。在其下游部分位于艾因塞夫拉市（Ain Sefra），瓦迪阿因塞夫拉（瓦迪布赖伊迪（Wadi Breidj）和提尔昆特（Tirkount）的交界处。它穿越了完全城市化的地区，在这里容易遭受大量的洪水泛滥，造成许多经济或生命损失，这些损害是由于人口增长和城市在该旱谷的自然空间中扩散所造成的。本文采用的方法学方法主要是通过水文工程中心的水文建模系统进行水文建模，并结合流域建模系统模型和地理信息系统，在水文工程中心的河流分析系统下进行水文建模。这项研究的目的是通过考虑地方当局建造的混凝土挡土墙的存在和不存在的情况来分析Ain Sefra市在极端洪水事件中的淹没行为。在这种情况下，将执行三种类型的模拟，其返回期分别为10年，100年和1000年。水力模型表明，挡土墙的存在导致了洪水区面积的减少，受洪水危害的土地少得多，因此研究区的洪水损害明显减少，但对于所有返回期来说仍然不足。模拟还强调指出，受洪水影响最大的区域是市区。最后，提出了保护概念，以确保Ain Sefra市的洪水更好地通过，从而降低风险并保护城市免受洪水的侵袭。

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