Differential Heat Flux Probe for Measurement of Groundwater Velocity

用于测量地下水流速的差动热通量探头

• 批准号: 9001654
• 负责人: Joseph Feldkamp
• 金额: $ 4.65万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-04-01 至 1991-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9001654&HistoricalAwards=false
• 关键词: Differential; Heat; Flux; Probe; Measurement

This is an award to provide support for research on the development of an instrument that can be used to measure the velocity of water flowing in subsurface aquifers. The basis of instrument operation is the generation and observation of a migrating thermal plume in the vicinity of the heated probe. The proposed instrument will be equipped to sense the motion of groundwater by monitoring the discharge of heat from the isothermally heated cylinder to the surrounding soil as a function of location on the probe surface. Unlike presently available devices, groundwater flow is directed around rather than through the probe. This provides the instrument with the advantage of component isolation from the groundwater environment. Hence, the probe is expected to maintain excellent long term stability (years). An accurate knowledge of groundwater movement is needed as greater pressures are exerted on our available groundwater resources. The depletion and recharge of groundwater supplies as well as the migration of contaminant "plumes" through groundwater can only be predicted given a knowledge of groundwater flow characteristics. This primarily entails a complete knowledge of groundwater flow speed and direction for the zone of interest. This award was made in accord with criteria outlined in NSF 89-85, Small Grants for Exploratory Research (SGER).

这是一个奖项，为研究提供支持， 开发一种可以用来测量 地下含水层中水流的速度。 的 仪器操作的基础是生成和 在附近观测到迁移的热羽流 加热的探针。 拟议的文书将是 通过监测来感知地下水的运动 从等温加热的 圆柱体对周围土壤的影响 在探头表面。 与目前可用的设备不同， 地下水的流动是围绕而不是通过 探测器 这为仪器提供了 与地下水隔离的优点 环境 因此，预计探测器将保持 良好的长期稳定性（年）。 地下水运动的准确知识是必要的， 我们的地下水受到更大的压力 资源 地下水的消耗和补充 供应以及污染物“羽流”的迁移 通过地下水，只能预测， 了解地下水流动特征。 这 首先需要对地下水流有全面的了解 感兴趣区域的速度和方向。 这个奖项 雅阁NSF 89-85中概述的标准进行， 探索性研究小额赠款。