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Hydrological analysis of the September 2014 torrential floods of the Danube tributaries in the Eastern Serbia
Natural Hazards ( IF 3.7 ) Pub Date : 2021-04-13 , DOI: 10.1007/s11069-021-04737-2
Ana M. Petrović , Ivan Novković , Stanimir Kostadinov

Torrential flood as a rainfall precipitation driven natural hazard occurs in the watershed that responds within several hours due to a rugged topography. The extraordinary torrential flood event from September 15 2014 in the Eastern Serbia with its severe consequences, widespread material damages and casualties, draw an attention of the Serbian public and is a topic of this work. The combined method of Soil Conservation Service and synthetic unit triangular hydrograph is used to calculate the effective rainfall and peak discharges in five affected watersheds (Podvrška, Velika Kamenica, Slatinska, Zamna, and Mala Kamenica) in order to define the extremeness of this event. Special attention is given to the determination of the lag time defining the unit hydrograph and the curve numbers of the studied watersheds on the base of land use and hydrological class of soils with regard to geology, considering antecedent soil moisture conditions. Taking into account the high curve number (due to the high share of soils with an unfavorable hydrological conditions and high share of agriculture areas in land use), the shortest time to peak (due to the highest mean slope of river bed), the highest specific maximal discharge on subject date (4.58 m3s−1 km−2) as well as sediment transport data, the highest priority for erosion and torrential flood control works is attributed to the Mala Kamenica watershed. The results of this work may be a significant contribution to the flood risk assessment on a watershed level in this part of Eastern Serbia that should always start with reviewing and analyzing the historical torrential flood events.



中文翻译:

2014年9月塞尔维亚东部多瑙河支流洪灾的水文分析

由于地形崎,在流域发生了数小时之内响应的,由降雨引起降雨的自然灾害的洪水。2014年9月15日在塞尔维亚东部发生的特大洪灾事件造成了严重后果,广泛的物质损失和人员伤亡,这引起了塞尔维亚公众的关注,并且是这项工作的主题。为了确定该事件的极端性,使用了土壤保护局和合成单位三角水位法相结合的方法来计算五个受影响流域(Podvrška,Velika Kamenica,Slatinska,Zamna和Mala Kamenica)的有效降雨和峰值流量。考虑到先前的土壤湿度条件,应特别注意确定滞后时间,以定义单位水位图和研究流域的曲线数,这些流域是根据土地利用和土壤水文类别的地质情况而定的。考虑到较高的曲线数(由于水文条件不利的土壤所占比例较高以及土地使用中农业地区所占比例较高),达到峰值的时间最短(由于河床的平均坡度最高),最高特定日期的最大排放量(4.58 m3 s -1  km -2)以及泥沙输送数据,侵蚀和洪灾防洪工作的最高优先级归因于Mala Kamenica流域。这项工作的结果可能是对塞尔维亚东部这一分水岭地区洪水风险评估的重要贡献,应始终从回顾和分析历史洪灾事件开始。

更新日期:2021-04-13
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