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相关概念视频

Design Example: Analyzing Capacity Contours for Flood Risk Assessment01:17

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Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
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Trapezoidal channels are widely used in irrigation systems due to their cost-effectiveness and efficiency in conveying water. Trapezoidal channels feature a flat bottom and sloping sides, making them stable and easier to construct compared to other shapes. The bottom width and side slope ratio are determined based on the required flow capacity and site conditions. The side slope is kept gentle for unlined channels to prevent soil erosion.Hydraulic parameters in channel design include the flow...
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Water flow in open channels is often measured using hydraulic structures such as weirs, which allow precise calculation of discharge. In a rectangular channel, flow rates are measured using three types of weirs: rectangular sharp-crested, triangular sharp-crested, and broad-crested. The weir head is set at a fixed height above the channel bottom, simplifying calculations and enabling the relationship between depth and flow rate to be analyzed.For the rectangular sharp-crested weir, the flow...
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进口修改以增加盒子通道容量:一个数值建模方法.

Thea Maria Dorothea Giliomee1, Ione Loots2, Marco van Dijk2

  • 1Department of Civil Engineering, University of Pretoria, Lynnwood Road, Hatfield, Pretoria, South Africa

Water science and technology : a journal of the International Association on Water Pollution Research
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概括

优化道入口结构的头墙和翼墙显著提高了雨水排水能力,提高了抗洪能力. 圆形边缘也可以改善流量,为更大的洪水事件提供可持续的解决方案.

关键词:
在 CFD 交易中,我们可以看到 CFD.计算流体动力学的流体动力学.防洪控制措施 防洪措施液压能力 液压能力 液压能力液压结构的水力结构.雨水排水 雨水排水

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科学领域:

  • 土木工程 土木工程是指土木工程.
  • 液压工程 液压工程是指水力工程.
  • 环境工程 环境工程

背景情况:

  • 门入口的修改可以提高雨水排水能力,这对于适应增加的洪水事件至关重要.
  • 头墙和翼墙建立了支结构,提供了优化潜力.
  • 之前的物理建模研究为进一步调查入口设计提供了基础.

研究的目的:

  • 评估更广泛的头墙和翼墙角度组合,以优化道入口容量.
  • 为了比较优化的头墙和翼墙与圆边框道入口的性能.
  • 在输入控制条件下,量化输入修改所带来的液压改进.

主要方法:

  • 利用数值建模来优化翼墙和头墙配置以及圆边进口.
  • 量化了由于各种进口改造而导致的排放能力改善.
  • 与已建立的液压参考和指南相比,经过验证的数值结果.

主要成果:

  • 一个15度的头墙与15度的翼墙在2D的头水深度 (两倍的顶高度) 上,提高了盒子顶流量高达34%.
  • 圆边框道入口显示,在2D.的头水深度下,最多改善了30%.
  • 15°头墙/15°翼墙组合证明了液压性能和实际实施的最佳平衡.

结论:

  • 入口修改,特别是特定的头墙和翼墙角度,提供了一种可持续和有效的方法来增加道排放能力.
  • 优化的入口设计可以通过提高雨水排水系统性能来显著减轻洪水风险.
  • 圆边进口提供了显著的改进,尽管优化的翼墙和头墙显示出更大的潜力提高容量.