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首页> 外文OA文献 >Flash Flood Early Warning Coupled with Hydrological Simulation and the Rising Rate of the Flood Stage in a Mountainous Small Watershed in Sichuan Province, China
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Flash Flood Early Warning Coupled with Hydrological Simulation and the Rising Rate of the Flood Stage in a Mountainous Small Watershed in Sichuan Province, China

机译：闪光洪水预警加上四川省山区小流域洪水阶段水文模拟及洪水阶段上升率。

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Flash floods in mountainous areas have become more severe and frequent as a result of climate change and are a threat to public safety and social development. This study explores the application of distributed hydrological models in flash floods risk management in a small watershed in Sichuan Province, China, and aims to increase early warning lead time in mountainous areas. The Hydrologic Engineering Center’s Hydrologic Modeling System (HEC-HMS) model was used to simulate the flash flood process and analyze the variation in flood hydrographs. First, the HEC-HMS model was established based on geospatial data and the river network shape, and eight heavy rainfall events from 2010 to 2015 were used for model calibration and validation, showing that the HEC-HMS model was effective for the simulation of mountain floods in the study area. Second, with the assumption that rainfall and flood events have the same frequency, the flood hydrographs with different frequencies (p = 1%, 2%, 5%, and 10%) were calculated by the HEC-HMS model. The rising limbs of the flood hydrographs were significantly different and can be divided into three parts (0−5 h, 6−10 h, and 11−15 h). The rising rate of the flood stage for each part of the flood hydrograph increases in multiples. According to the analysis of the flood hydrographs, two critical early warning indicators with an invention patent were determined in the study: the flood stage for immediate evacuation and the rising rate. The application of the indicators in the study shows that it is feasible to advance the time of issuing an early warning signal, and it is expected that the indicators can offer a reference for flash flood early warning in the study area and other small watersheds in mountainous areas.
机译：由于气候变化，山区的闪蒸洪水变得更加严重，频繁频繁，对公共安全和社会发展是一种威胁。本研究探讨了中国四川省一小分水岭中闪蒸风险管理中的分布式水文模型的应用，旨在提高山区的早期警告。水文工程中心的水文学建模系统（HEC-HMS）模型用于模拟闪光洪水过程，分析洪水文化的变化。首先，基于地理空间数据和河网状建立了HEC-HMS模型，2010年至2015年的八场大雨事件用于模型校准和验证，表明HEC-HMS模型对山的模拟有效研究区的洪水。其次，假设降雨和洪水事件具有相同的频率，通过HEC-HMS模型计算具有不同频率（P = 1％，2％，5％和10％）的洪水文献。洪水文化照片的上升率显不同，可分为三个部分（0-5小时，6-10小时和11-15小时）。洪水级洪水阶段的上升率增加了倍数。根据对洪水文化的分析，研究中有两种具有发明专利的关键预警指标：洪水阶段立即疏散和上升率。在研究中的应用表明，推进发出预警信号的时间是可行的，预计该指标可以为研究区和山区的其他小流域提供闪现洪水预警的参考地区。

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