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相关概念视频

Typical Model Studies01:30

Typical Model Studies

354
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
354
Design Example: Creating a Hydraulic Model of a Dam Spillway01:21

Design Example: Creating a Hydraulic Model of a Dam Spillway

158
Scaled hydraulic models of dam spillways provide a practical way to replicate and study the intricate flow dynamics of these structures. Often built to a 1:15 ratio, these models allow for observing critical water behavior, such as velocity distribution, flow patterns, and energy dissipation.
158
Conservation of Mass in Moving, Nondeforming Control Volume01:14

Conservation of Mass in Moving, Nondeforming Control Volume

1.1K
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.
In the context of a detention basin, the conservation of mass states that the total mass of water entering the basin must equal the mass leaving the basin plus any accumulation of...
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Modeling and Similitude01:12

Modeling and Similitude

261
Scaled modeling is a fundamental technique in engineering, enabling the study of large and complex systems by creating smaller, manageable replicas that recreate critical characteristics of the original. In hydrology and civil infrastructure, for example, scaled models of dams help analyze water flow, turbulence, and pressure. This method allows for accurate predictions of real-world behavior within a controlled environment, significantly reducing the cost and time involved in full-scale...
261
Design Example: Analyzing Capacity Contours for Flood Risk Assessment01:17

Design Example: Analyzing Capacity Contours for Flood Risk Assessment

43
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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Bioremediation00:46

Bioremediation

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Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
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相关实验视频

Updated: Jun 24, 2025

Capturing Flow-weighted Water and Suspended Particulates from Agricultural Canals During Drainage Events
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Capturing Flow-weighted Water and Suspended Particulates from Agricultural Canals During Drainage Events

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模拟多来源的塑料污染产量和流量,由收获区水文气象学过程驱动.

Yongyong Zhang1, Ming Dou2, Xueliang Cai3

  • 1Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China.

Water research
|June 13, 2024
PubMed
概括

一个新的模型量化了河流流域的塑料污染来源和运输. 固体废物是主要的贡献者,每年有12.5%的塑料产量到达河流,为缓解战略提供信息.

关键词:
组合建模组合建模组合的建模人类发展指数 人类发展指数水文模型 水文模型穆兰河流域的流域多种塑料来源多种塑料来源.

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科学领域:

  • 环境科学 环境科学
  • 水文学的水文学
  • 污染研究 污染研究

背景情况:

  • 塑料污染是影响生态系统的重大全球环境问题.
  • 了解塑料的来源和运输在采集区规模至关重要,但有限.

研究的目的:

  • 开发和验证多来源塑料产量和运输模型,用于采集区规模分析.
  • 确定塑料污染的主要来源,并量化它们对河流塑料负载的贡献.

主要方法:

  • 整合了一个结合经济活动,气候数据和水文过程的模型.
  • 使用现场观测,文献和统计抽样进行校准的模型参数.
  • 模拟2010-2020年在穆兰河流域的塑料产量和运输.

主要成果:

  • 该模型表现出强的性能,河流外流与监测数据的相关性很高 (0.97).
  • 固体废物 (37.8%) 是河流塑料的主要来源,其次是农业薄膜 (26.4%) 和不透的表面 (21.5%).
  • 每年的河流塑料流出量估计为每年9.3-43.0,其中12.5%的总产量到达河流.

结论:

  • 该研究提供了对水域规模塑料污染动态的关键见解.
  • 确定了有针对性的缓解工作的关键来源和运输途径.
  • 开发的模型是有效管理塑料污染的宝贵工具.