Zhu Tengyi, Fu Dafang, Jenkinson Byron, Jafvert Chad T
School of Civil Engineering, Southeast University, Nanjing, 210096, China.
Environ Monit Assess. 2015 Apr;187(4):171. doi: 10.1007/s10661-015-4388-7. Epub 2015 Mar 10.
The advective flow of sediment pore water is an important parameter for understanding natural geochemical processes within lake, river, wetland, and marine sediments and also for properly designing permeable remedial sediment caps placed over contaminated sediments. Automated heat pulse seepage meters can be used to measure the vertical component of sediment pore water flow (i.e., vertical Darcy velocity); however, little information on meter calibration as a function of ambient water temperature exists in the literature. As a result, a method with associated equations for calibrating a heat pulse seepage meter as a function of ambient water temperature is fully described in this paper. Results of meter calibration over the temperature range 7.5 to 21.2 °C indicate that errors in accuracy are significant if proper temperature-dependence calibration is not performed. The proposed calibration method allows for temperature corrections to be made automatically in the field at any ambient water temperature. The significance of these corrections is discussed.
沉积物孔隙水的平流是理解湖泊、河流、湿地和海洋沉积物中自然地球化学过程以及正确设计覆盖在受污染沉积物上的渗透性修复沉积物覆盖层的一个重要参数。自动热脉冲渗流仪可用于测量沉积物孔隙水流动的垂直分量（即垂直达西流速）；然而，文献中关于仪器校准作为环境水温函数的信息很少。因此，本文全面描述了一种根据环境水温校准热脉冲渗流仪的方法及相关方程。在7.5至21.2°C温度范围内的仪器校准结果表明，如果不进行适当的温度依赖性校准，精度误差会很大。所提出的校准方法允许在现场任何环境水温下自动进行温度校正。讨论了这些校正的重要性。
