Milford Neck - DTW, Water Temperature, Specific conductance - Nov 2021-ongoing

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 Delaware Forested site (Milford Neck) 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CZNet沿海集群（CZNet Coastal Cluster）下属特拉华森林站点（米尔福德岬，Delaware Forested site (Milford Neck)）的4口监测井的地下水埋深（单位：米，以地面为基准）、水温（单位：摄氏度）及比电导率（specific conductance, uS/cm）实测数据。每口监测井均安装了Solinst Levelogger 5型3001传感器（Solinst Levelogger 5 Model 3001s），以15分钟为间隔在野外连续采集压力、温度与电导率数据。该水位记录仪通过尼龙绳固定，安装于监测井滤水管中点的近似深度处。地下水埋深数据由水位记录仪测得的压力值转换得到：压力值已校正大气压力波动，并结合每台水位记录仪部署起止阶段采集的手动基准埋深数据，转换为地下水埋深数值。水温数据未做任何校正。比电导率数值由水位记录仪测得的电导率值，依据标准方法2510B（Standard Method 2510B）给出的公式计算得到。在两次部署间隔期间，将每台水位记录仪浸没于已知比电导率的校准溶液中并记录其实时读数。若实时读数与校准溶液标称浓度的偏差超过±5%，则按照制造商规范对传感器进行校准。通过向传感器实测值添加校正因子的方式，对传感器漂移导致的比电导率数值进行校正。为开展传感器维护与校准工作，技术人员偶尔会在各监测井之间调换水位记录仪。由于在重新部署前需定期暂停水位记录仪以下载数据，因此各部署周期之间的记录可能存在数据间隙。