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相关概念视频

Responses to Drought and Flooding02:41

Responses to Drought and Flooding

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Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
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Design Example: Design of an Irrigation Channel01:27

Design Example: Design of an Irrigation Channel

99
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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Adaptations that Reduce Water Loss01:57

Adaptations that Reduce Water Loss

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Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
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Underflow Gates01:30

Underflow Gates

55
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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Responses to Salt Stress02:02

Responses to Salt Stress

13.1K
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
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相关实验视频

Updated: Jul 5, 2025

Wastewater Irrigation Impacts on Soil Hydraulic Conductivity: Coupled Field Sampling and Laboratory Determination of Saturated Hydraulic Conductivity
08:09

Wastewater Irrigation Impacts on Soil Hydraulic Conductivity: Coupled Field Sampling and Laboratory Determination of Saturated Hydraulic Conductivity

Published on: August 19, 2018

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太阳能灌地下水的风险

Soumya Balasubramanya1, Dustin Garrick2,3, Nicholas Brozović4

  • 1Environment Global Practice, The World Bank, Washington, DC, USA.

Science (New York, N.Y.)
|January 18, 2024
PubMed
概括
此摘要是机器生成的。

温室气体减排可能不足以实现目标. 预计越来越多地依赖地下水资源,可能会影响水资源的可用性.

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Design and Construction of an Urban Runoff Research Facility
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Design and Construction of an Urban Runoff Research Facility

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Vegetated Treatment Systems for Removing Contaminants Associated with Surface Water Toxicity in Agriculture and Urban Runoff
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Vegetated Treatment Systems for Removing Contaminants Associated with Surface Water Toxicity in Agriculture and Urban Runoff

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相关实验视频

Last Updated: Jul 5, 2025

Wastewater Irrigation Impacts on Soil Hydraulic Conductivity: Coupled Field Sampling and Laboratory Determination of Saturated Hydraulic Conductivity
08:09

Wastewater Irrigation Impacts on Soil Hydraulic Conductivity: Coupled Field Sampling and Laboratory Determination of Saturated Hydraulic Conductivity

Published on: August 19, 2018

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Design and Construction of an Urban Runoff Research Facility
13:48

Design and Construction of an Urban Runoff Research Facility

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13.1K
Vegetated Treatment Systems for Removing Contaminants Associated with Surface Water Toxicity in Agriculture and Urban Runoff
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Vegetated Treatment Systems for Removing Contaminants Associated with Surface Water Toxicity in Agriculture and Urban Runoff

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科学领域:

  • 环境科学
  • 气候变化研究
  • 水资源管理

背景情况:

  • 全球气候变化需要大幅减少排放.
  • 由于人类活动和气候影响,水资源面临越来越大的压力.

研究的目的:

  • 评估当前减排战略的预期有效性.
  • 预测地下水使用的未来趋势.

主要方法:

  • 对气候模型和排放数据的分析.
  • 模拟地下水变化的水文建模.

主要成果:

  • 预计的减排不太可能达到国际目标.
  • 在许多地区,地下水的提取量可能会大幅增加.

结论:

  • 目前的气候政策可能不足以实现所需的排放水平.
  • 未来的水安全可能会受到越来越严重的地下水依赖的威胁.