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热脉冲式包气带微流速监测系统研究和室内试验

Hydrogeology & Engineering Geology(2006)

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Abstract
本文介绍了热脉冲式包气带微流速监测系统的原理研究、硬件设计及其标定和室内模拟试验。该监测系统理论上应用了线状热源热传导方程的两个阶段:计算微流速采用的是热传导方程的稳态阶段;计算热导率和土壤含水率用的是方程的非稳态阶段。监测系统前端机的研制着重介绍了硬件设计。室内模拟试验为饱和砂土的室内对比试验,流速值从18~485mm/h。实验结果显示系统的测量值和实际值能很好的吻合。
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Key words
soil water velocity,heat conductivity,unsaturated zone,heat pulse
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