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相关概念视频

Quality of Water01:19

Quality of Water

In concrete preparation, the quality of water is paramount as it affects the strength and durability of the concrete. Potable water is usually preferred; however, it must not have excessive sodium or potassium to prevent compromising the concrete's integrity. Water quality is typically evaluated based on impurities such as dissolved solids, chlorides, and sulfates, and its pH value is ideally between 6 and 8. Even slightly acidic natural water may be acceptable unless it contains harmful...
Testing Water Quality01:14

Testing Water Quality

When the quality of water for concrete preparation is uncertain, its impact on the setting time of cement and compressive strength of mortar is assessed by comparison with de-ionized or distilled water benchmarks. American Society for Testing and Materials (ASTM) C1602 requires the setting times to be within 90 minutes of the control, British Standard (BS) 3146:1980 allows a 30-minute variance in the initial setting, while British Standards European Norm (BS EN) 1008 specifies initial setting...

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Chlorination-driven redox metabolic reprogramming promotes bacterial persistence and cross-resistance in drinking water systems.

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相关实验视频

Updated: May 30, 2026

Watershed Planning within a Quantitative Scenario Analysis Framework
12:44

Watershed Planning within a Quantitative Scenario Analysis Framework

Published on: July 24, 2016

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一个数据驱动的指数,用于评估BMP水质性能.

Elizabeth A Fassman-Beck1, Edward D Tiernan1, Ka Lun Cheng2

  • 1Southern California Coastal Water Research Project, 3535 Harbor Blvd. Ste. 110, Costa Mesa, CA 92627, USA.

Water research
|May 11, 2025
PubMed
概括
此摘要是机器生成的。

一个新的雨水最佳管理实践 (BMP) 绩效指数 (PI) 提供了一种简单,公正的方法来评估水质处理性能. 这一数据驱动的指数为BMP规划,实施和维护提供了可操作的见解.

关键词:
NPDES, 雨水质量, 非点源污染, 绩效评估, 绿色基础设施城市的排水.

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Author Spotlight: Understanding Riverine Nitrogen Impacts and Primary Productivity for Effective Nutrient Management
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科学领域:

  • 环境工程 环境工程
  • 水质管理水质管理
  • 风暴水管理风暴水管理

背景情况:

  • 雨水最佳管理实践 (BMP) 对于减轻城市水污染至关重要.
  • 由于不同的条件,评估BMP的真正性能可能是复杂的.
  • 现有的评估方法可能无法为管理人员提供清晰,可操作的反.

研究的目的:

  • 开发一个数据驱动的绩效指数 (PI),用于评估结构性雨水BMPs.
  • 提供一种公正和简单的方法来解释BMP水质处理性能.
  • 为BMP规划,实施和维护生成可操作的信息.

主要方法:

  • 开发了一个使用现场监测的流入-流出污染物度的PI.
  • 用户指定的水质基准标准进行客观比较的规范化数据.
  • 将规范化数据捆绑到绩效类别 (成功,过剩,边际,不足,失败).
  • 调整了一个分析层次程序,以结合多个污染物得分.

主要成果:

  • 该PI允许比较BMP性能,无论处理机制,气候,水文或特定地点的污染物水平.
  • 绩效类别为实现下游水质目标的潜力提供了明确的指标.
  • 该PI方便选择BMP,比较类似的BMP,并提供可操作的反以进行改进.

结论:

  • 开发的PI为评估雨水BMP性能提供了一个强大的,可适应的工具.
  • 它为管理人员,设计人员和维护团队提供了清晰,可解释的反.
  • 该计划支持有效的流域管理和实现水质目标的知情决策.