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首页> 外文期刊>Journal of Hydrology: Regional Studies >An integrated approach for investigating geomorphic changes due to flash flooding in two small stream channels (Western Polish Carpathians)
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An integrated approach for investigating geomorphic changes due to flash flooding in two small stream channels (Western Polish Carpathians)

机译：一种综合方法，用于调查两种小型流渠道闪电（西部波兰喀尔巴阡山脉）的闪电洪水变化

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Study regionPoland, Carpathians, Gorce Mountains, Jamne and Jaszcze catchments.Study focusThe hydrological response to, and geomorphic impacts of, a 18 July 2018 flood involving two small catchments (each covering less than 12?km2) that were not hydrologically controlled were examined. A peak flood discharge was simulated with two hydrological models: SCS-CN and SCS-UH. Hydrological modelling was performed in order to complement the post-flooding investigations and to verify the hydrological data via cross-check comparison. Geodetic measurements of the channels and ALS and TLS data were used to analyse the geomorphological changes. In addition, the flood magnitude recorded for the studied streams was compared with the other local flash floods in the Carpathians using the unitKflood index (a non-dimensional measure).New hydrological insights for the regionThe maximum unit flow (4.1–4.8?m3s?1?km-2) placed this flood event among the 10 largest flash floods in the Polish Carpathians (based on theKindex). The peak discharge simulated with the SCS-CN and SCS-UH hydrological models was similar to the data obtained during the post-flooding investigation, indicating that this method can be used for catchments in the Polish Carpathians that are not managed hydrologically. The high unit stream powers estimated for the analysed channel cross sections (>750?W m-2) were associated with narrow channels and steep slopes. The most significant geomorphological changes were observed in unmanaged channel reaches. Moreover, the channel transformations in the Jamne catchment were greater than those in the Jaszcze catchment (in a more forested area). This analysis can be useful in the evaluation of flood risk management processes associated with flash floods in small, unmanaged catchments.
机译：研究地区波兰，喀尔巴阡山脉，峡谷山脉，鸡蛋和jaszcze集水区。研究所重点关注水文反应，2018年7月18日涉及两种小型集水区（每个覆盖率小于12？KM2）的水性反应。用两种水文模型模拟峰值溢流排放：SCS-CN和SCS-UH。进行水文建模以补充泛滥的调查，并通过交叉检查比较验证水文数据。使用通道和ALS和TLS数据的大地测量来分析地貌变化。此外，使用UnitKflood指数（非维度测量）与喀尔巴阡山脉中的其他本地闪光洪水进行比较所记录的洪水幅度。新的水文洞察最大单位流动（4.1-4.8？M3s？ 1 km-2）在波兰喀尔巴阡山脉（基于TheKIndex）的10个最大的闪光洪水中放置了这一洪水事件。模拟与SCS-CN和SCS-UH水文模型模拟的峰值放电类似于在洪水后调查期间获得的数据，表明该方法可用于在不经常管理的波兰喀尔巴阡山脉中的集水区。估计的分析通道横截面（>750μm-2）估计的高单元流功率与窄通道和陡坡相关联。在非托管渠道达到的情况下观察到最显着的地貌变化。此外，Jamne集水区中的通道变换大于Jaszcze集水区（在更森林区域）中的通道变换。该分析可用于评估与小型非囚犯中的闪蒸洪水相关的洪水风险管理过程。

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