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相关概念视频

Design Example: Maintaining Level of an Embankment01:19

Design Example: Maintaining Level of an Embankment

97
Constructing a roadway embankment over uneven terrain requires precise leveling to ensure stability and proper drainage. Surveyors use a leveling instrument and staff to calculate ground elevations and determine the required fill material at each point along the embankment alignment.The process begins by positioning a leveling instrument near a benchmark with a known elevation. A backsight reading establishes the instrument height, which serves as a reference for subsequent measurements. A...
97
Design Example: Design of an Irrigation Channel01:27

Design Example: Design of an Irrigation Channel

148
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...
148
Energy Considerations in Open Channel Flow01:27

Energy Considerations in Open Channel Flow

120
Open channel flow, where a fluid flows with a free surface exposed to the atmosphere, is primarily governed by gravitational and surface effects, distinguishing it from closed conduit or pipe flow. In open channels such as rivers, canals, and artificial channels, energy analysis provides valuable insights into flow behavior and the relationship between depth, velocity, and slope.Specific Energy and Flow DepthIn open channel flow, the specific energy, E, combines the gravitational potential...
120

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相关实验视频

Updated: Jul 27, 2025

Soil Lysimeter Excavation for Coupled Hydrological, Geochemical, and Microbiological Investigations
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基于红床土壤的斜坡工程生态膜.

Haoqiang Lai1,2, Cuiying Zhou1,2, Zhen Liu1,2

  • 1School of Civil Engineering, Sun Yat-sen University, Guangzhou, P. R. China.

PloS one
|June 8, 2023
PubMed
概括
此摘要是机器生成的。

这项研究开发了一个生态膜,使用红床土壤和聚合物粘合剂来保护斜坡. 最佳的30%红床土壤含量增强了抗拉强度和土壤抗侵蚀能力.

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Design and Construction of an Urban Runoff Research Facility
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Integrated Field Lysimetry and Porewater Sampling for Evaluation of Chemical Mobility in Soils and Established Vegetation
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相关实验视频

Last Updated: Jul 27, 2025

Soil Lysimeter Excavation for Coupled Hydrological, Geochemical, and Microbiological Investigations
10:30

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科学领域:

  • 环境科学 环境科学
  • 材料科学 材料科学 材料科学
  • 地质技术工程 地质技术工程

背景情况:

  • 生态坡道保护对于环境恢复至关重要.
  • 现有的方法在土壤稳定和生态整合方面面临挑战.
  • 需要创新的材料来有效地管理斜坡.

研究的目的:

  • 开发和描述一种用于斜坡保护的新型生态膜.
  • 为了研究红床土壤和聚合物粘合剂含量对膜特性的影响.
  • 评估开发的膜的土壤保护和生态恢复性能.

主要方法:

  • 生态膜的制造具有不同的红色床土和聚合物粘合剂百分比.
  • 评估基本的物理和机械性能 (抗拉强度,粘度).
  • 对土壤保护 (防侵蚀试验) 和生态恢复 (植物生长试验) 的评估.

主要成果:

  • 生态膜表现出良好的性和高抗拉强度.
  • 在30%的红床土壤含量下,可以达到最佳的抗拉强度.
  • 增加的聚合物粘合剂含量增加了拉力变形和粘度.
  • 膜显著改善了土壤的抗侵蚀性能.

结论:

  • 开发的生态膜为斜坡生态保护提供了一个有前途的解决方案.
  • 材料组成极大地影响了膜的物理,机械和保护性质.
  • 这项研究提供了支持生态膜在斜坡工程中的开发和应用的数据.