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River Floodplain 1D/2D Hydraulic Modelling Combined with Recent LiDAR DTM Technology

机译：River Floodplain 1D / 2D液压建模结合近期LIDAR DTM技术

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The study presents problem of floods management for lowland rivers and provides solution for such complex task. The paper aims to elaborate a methodology for flood management model on large lowland rivers using precision digital terrain models (DTM) and combined 1D/2D unsteady flow model. The river Danube on the territory of Serbia was used with its tributaries for the development of the model. The length of the hydraulic model is 715 km and the achieved accuracy of the model, by comparing the calculated and observed levels on 10 water stations, is below 10 cm. Combined 1D/2D HEC-RAS model is adjusted by making use of the resulting high-resolution input. The ability of the combined 1D/2D model, based mainly on the high-accuracy input data, provides an accurate estimate of flood wave propagation. The result of this paper is a defined methodology providing sufficient accuracy to the hydraulic model of flood wave propagation in case of large lowland rivers, requiring acceptable short calculation time. Also, the methodology to specify relevant flood stage (design flood) which is used to determine levee crest elevation is developed in this paper.
机译：该研究提出了低地河流洪水管理问题，为这类复杂任务提供了解决方案。本文旨在利用精密数字地形型号（DTM）和组合的1D / 2D非定常流模型，详细阐述大型低地河流洪水管理模型的方法。塞尔维亚境内的多瑙河与其支流用于发展该模型的支流。液压模型的长度为715 km，通过比较10个水站上的计算和观测的水平来实现模型的准确性，低于10厘米。通过使用所产生的高分辨率输入来调整组合的1D / 2D HEC-RAS模型。组合的1D / 2D模型的能力主要基于高精度输入数据，提供了对洪波传播的准确估计。本文的结果是一种定义的方法，为大型低地河流进行洪波传播的水力模型提供足够的准确性，需要可接受的短计算时间。此外，本文开发了用于指定用于确定堤坝高程的相关洪水阶段（设计洪水）的方法。

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