永年北杜井上两种水温仪的对比观测实验及其结果分析

Contrast observation and analysis of two kinds of water thermometer in Yongnian-Beidu well

同井安装的ZKGD3000-NT型地下水数据监测系统水温仪和SZW-1型数字式温度计在永年北杜井250 m深度进行对比观测与井水温梯度测量,结果表明,温度梯度都随着深度的增加,井水温度逐渐升高,水温与深度呈正相关,没有明显的梯度异常井段。但两者温度动态差异较大,SZW-1温度计观测结果动态稳定性高,可以判定温度22.58℃是永年井250 m深度的井水温度,基本保持稳定上升趋势,上升速率稳定;而同孔同深度安装的ZKGD3000-NT水温仪测值波动性较大,变化速率也大,呈现下降趋势或下降速率增大。

In Yongnian-Beidu well,there are two kinds of water thermometer to monitor the well water temperature.One is the ZKGD3000-NT type and the other is SZW-1type digital thermometer.Water temperature at the depth of250m and well water temperature gradient recorded by these two kinds of water thermometers are compared and analyzed.Results show that water temperature gradient recorded by these two instruments has the same law:well water temperature and depth were positively correlated with no anomaly.For dynamic observation,the SZW-1type is more stable and the well temperature at the depth of250m is about22.58℃with stable upward trend and small changing rate.While the well water temperature observed by the ZKGD3000-NT installed at the same depth is much unstable with downward trend and large changing rate.