Virginia Forest - DTW, Water Temperature, Specific conductance - Jun 2021-Jul 2024

This dataset includes depth to water (m, from ground surface), water temperature (degrees C) and specific conductance (uS/cm) measurements from four monitoring wells at the Virginia Forest site (Brownsville) for the CZNet Coastal Cluster. Pressure, temperature and electrical conductivity were measured continuously in the field at 15-minute intervals with Solinst Levelogger 5 Model 3001s installed in each monitoring well. The Leveloggers were attached to a nylon cord and installed at the approximate depth of the well screen mid-point. Depth to water measurements were converted from Levelogger-measured pressure values. Pressure values were corrected for barometric pressure fluctuations and converted to depth to water values using reference manual depth to water measurements collected at the start and stop of each Levelogger deployment. No correction was done to the temperature values. Specific conductance values were calculated from Levelogger-measured electrical conductivity using the equation given by Standard Method 2510B. Between deployments, each Levelogger was submerged in a calibration solution with a known SC and the real-time reading was recorded. If the real-time reading was +/-5% of the calibration solution concentration, the sensor was calibrated according to manufacturer specifications. SC values were adjusted for sensor drift by adding a correction factor to the sensor-measured value. Leveloggers were occasionally swapped between wells to allow for sensor maintenance and calibration. Because the Leveloggers were periodically stopped to download data before being redeployed, there may be gaps in the record between deployments.

本数据集包含来自弗吉尼亚森林地点（布朗斯维尔）四个监测井的地下水深度（米，自地面起）、水温（摄氏度）和电导率（微西门子/厘米）的测量数据，属于CZNet沿海集群。利用安装在各个监测井中的Solinst Levelogger 5型号3001s，在野外以15分钟为间隔持续测量压力、温度和电导率。Levelogger设备通过尼龙绳固定，安装在井筛中点的近似深度。地下水深度测量值通过Levelogger测量的压力值转换而来。压力值经大气压力波动校正后，参照Levelogger部署开始和结束时的参考手动深度值转换为地下水深度值。水温值未进行校正。电导率值根据标准方法2510B所提供的公式，由Levelogger测量的电导率计算得出。在两次部署之间，每个Levelogger被浸泡在已知电导率的校准溶液中，并记录实时读数。如果实时读数与校准溶液浓度相差±5%，则根据制造商规格对传感器进行校准。电导率值通过向传感器测量值添加校正系数来调整传感器漂移。Levelogger偶尔在不同井之间交换，以便进行传感器维护和校准。由于Levelogger在重新部署前需要定期停止以下载数据，因此部署记录之间可能存在间隔。