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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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Stormwater detention basins are essential in managing runoff during heavy rainfall, particularly in urban areas where impervious surfaces increase the risk of flooding. Understanding the conservation of mass in these systems allows engineers to optimize basin performance, balancing inflow, outflow, and water storage.
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As the human population continues to grow and use resources, we must be mindful of our planet’s natural limits. Sustainable development provides a pathway to maintain and improve human life now while also ensuring that future generations will have the resources that they need. The long-term success of sustainability efforts rests on understanding the interplay between human actions and ecological systems.
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Underflow gates are vital for controlling water flow in irrigation canals. The three main types of underflow gates — vertical, radial, and drum gates — serve different purposes while ensuring effective flow management. Vertical gates move up and down, generating a free-flowing water jet; radial gates pivot to regulate the flow; and drum gates rotate for precise adjustments. The flow through these gates is influenced by downstream conditions, resulting in free or drowned outflow.Free and...
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拯救公河三角洲免于淹没

G M Kondolf1, R J P Schmitt1,2, P A Carling3

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概括

政策必须解决土地沉降的根本原因,而不仅仅是其明显的影响. 有效的策略需要了解和减轻潜在的驱动因素,

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科学领域:

  • 地质科学
  • 环境科学
  • 城市规划

背景情况:

  • 土地沉降是一个重要的地质危险,对基础设施和生态系统构成风险.
  • 目前的政策往往侧重于减轻沉降影响, 而不是解决主要原因.

研究的目的:

  • 突出针对土地沉降的驱动因素的政策干预的迫切需要.
  • 在管理沉降风险方面主动采取措施.

主要方法:

  • 对土地沉降原因和政策应对措施的现有文献进行审查.
  • 分析表明以症状为中心的政策无效的案例研究.
  • 对沉降机制的科学理解的综合.

主要成果:

  • 忽视地下水开采或土壤压缩等驱动因素的政策是不够的.
  • 解决根本原因可以实现更可持续,更有效的沉降管理.
  • 一个全面的政策框架对于长期缓解至关重要.

结论:

  • 有效的土地沉降管理需要直接针对其基本驱动因素的政策.
  • 为了减轻沉降影响,从反应性政策转向主动性政策至关重要.