Turbulence and sediment transport in complex open channels

复杂明渠中的湍流和沉积物输送

• 批准号: 386117-2011
• 负责人: MacVicar, Bruce
• 金额: $ 1.68万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=528740
• 关键词: Turbulence; sediment; transport; complex; open

Urban rivers are profoundly altered by hydrological regime change and direct manipulation of the channel. Stream restoration is frequently attempted as a means of mitigating the physical and environmental degradation that results. However, scientists and regulatory bodies remain confounded by the problem of sediment transport, particularly in unstable streams and through natural streams with complex geometry created by bars, pools, riffles and other features. This inability to predict sediment transport in all but the most ideal cases limits our ability to anticipate the cumulative effect of urbanisation and other human activities on rivers, including restoration, and to correct adverse trends.

城市河流的水文情势变化和直接操纵的渠道深刻地改变。 经常尝试恢复河流，以减轻由此造成的物理和环境退化。 然而，科学家和管理机构仍然对沉积物迁移问题感到困惑，特别是在不稳定的河流中，以及通过由沙洲、水池、浅滩和其他特征形成的复杂几何形状的自然河流。 除了最理想的情况外，这种无法预测泥沙输运的能力限制了我们预测城市化和其他人类活动对河流的累积影响（包括恢复）以及纠正不利趋势的能力。