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相关概念视频

Testing Water Quality01:14

Testing Water Quality

340
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...
340

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现代化深层地下水测试:使用长屏幕测试井进行快速堆叠动态分析.

Noah R Heller, Marina Feraud1, Christian Kropf2

  • 1Best Environmental Subsurface Technologies (BESST, Inc.), 50 Tiburon Street, Suite 7, San Rafael, CA, 94901.

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概括
此摘要是机器生成的。

使用追踪流量计和深度依赖采样仪 (TFDDS) 调查的新方法改善了公共供应井的设计. 这种方法准确地描述了水的化学成分和流量,防止饮用水不符合要求,并降低了处理成本.

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科学领域:

  • 水文地质学 水文地质学
  • 环境科学 环境科学
  • 水资源管理 水资源管理

背景情况:

  • 在试验孔中的常规区域测试往往低估了公共供应井中的成分分布.
  • 层次化化学分布,特别是金属和放射性核化物在石学边界的分布,经常被忽视.
  • 这导致井井不符合监管标准,处理成本增加.

研究的目的:

  • 提出和验证一种新的方法来描述潜在的公共供水井的地下水流量和化学成分.
  • 通过在最终安装之前提供高分辨率数据来最大限度地降低构建不合格井的风险.
  • 将先进的采样技术与井设计相结合,以改善水质预测.

主要方法:

  • 使用追踪器流量计和深度依赖采样仪 (TFDDS) 进行详细的流量和化学分析.
  • 在抽水条件下使用长测试井 (LSTWs) 的垂直堆叠流量和质量平衡化学概况.
  • 将TFDDS数据与一系列钻探方法集成,以快速获取液压和化学数据.

主要成果:

  • 拟议的方法产生了人为和地质成分在和区内的详细分布.
  • 描述包括透性沉积物和沉积物类型之间的污染物负载边界.
  • 高分辨率数据使得新井符合监管标准的信息可预测.

结论:

  • 综合的TFDDS和LSTW分析方法提高了地下水资源表征的准确性.
  • 这种方法对于设计公共供应井,产生符合饮用水的设计至关重要.
  • 案例研究表明,新井设计和管理的含水层补充项目都具有实用性.