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首页> 外文期刊>Journal of Hydroinformatics >Flood wave propagation in steep mountain rivers
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Flood wave propagation in steep mountain rivers

机译:陡峭山区河流中的洪水波传播

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摘要

Most of the recent developments concerning efficient numerical schemes to solve the shallow-water equations in view of real world flood modelling purposes concern the two-dimensional form of the equations or the one-dimensional form written for rectangular, unit-width channels. Extension of these efficient schemes to the one-dimensional cross-sectional averaged shallow-water equations is not straightforward, especially when complex natural topographies are considered. This paper presents different formulations of numerical schemes based on the HLL (Harten-Lax-van Leer) solver, and the adaptation of the topographical source term treatment when cross-sections of arbitrary shape are considered. Coupled and uncoupled formulations of the equations are considered, in combination with centred and lateralised source term treatment. These schemes are compared to a numerical solver of Lax Friedrichs type based on a staggered grid. The proposed schemes are first tested against two theoretical benchmark tests and then applied to the Brembo River, an Italian alpine river, firstly simulating a steady-state condition and secondly reproducing the 2002 flood wave propagation.
机译:考虑到现实世界洪水建模的目的,有关有效数值方案来解决浅水方程的最新进展大部分涉及方程的二维形式或为矩形单位宽度通道编写的一维形式。将这些有效方案扩展到一维截面平均浅水方程并不是一件容易的事,特别是在考虑复杂的自然地形时。本文提出了基于HLL(Harten-Lax-van Leer)求解器的数值格式的不同公式,并考虑了任意形状的横截面时对地形源项处理的适应性。考虑到方程的耦合和非耦合公式,以及中心化​​和侧化的源项处理。将这些方案与基于交错网格的Lax Friedrichs类型的数值求解器进行了比较。首先针对两个理论基准测试对提议的方案进行了测试,然后将其应用于意大利的高山河流Brembo河,首先模拟了稳态条件,其次再现了2002年洪水波的传播。

著录项

  • 来源
    《Journal of Hydroinformatics》 |2013年第1期|120-137|共18页
  • 作者单位

    Department of Civil Engineering and Architecture, University of Pavia, Via Ferrata, 1, 27100, Pavia, Italy;

    Department of Civil Engineering and Architecture, University of Pavia, Via Ferrata, 1, 27100, Pavia, Italy;

    Department of Hydraulics, Transportation and Highways, University of Roma la Sapienza', Via Eudossiana 18, 00184, Rome, Italy;

    Fonds pour la Recherche dans I'lndustrie et I'Agriculture (FRIA), B-1000 Brussels, Belgium,Universite catholique de Louvain, Institute of Mechanics, Materials and Civil Engineering, Hydraulics Unit, Place du Levant, 1, B-1348 Louvain-la-Neuve, Belgium;

    Universite catholique de Louvain, Institute of Mechanics, Materials and Civil Engineering, Hydraulics Unit, Place du Levant, 1, B-1348 Louvain-la-Neuve, Belgium;

    Universite catholique de Louvain, Institute of Mechanics, Materials and Civil Engineering, Hydraulics Unit, Place du Levant, 1, B-1348 Louvain-la-Neuve, Belgium;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    1D models; complex topography; shallow water equations; source terms; steady and unsteady flow;

    机译:一维模型;复杂的地形;浅水方程;来源条款;稳定和不稳定流动;

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