Ground Water Depth Readings at BCEF/LTER Floodplain Sites, 1991-Present: Hourly

Campbell CR7 dataloggers were used at FP1A, FP2A, and FP4A to measure ground water and river levels (river levels only at FP4A) during the summer growing season. Each site has four wells being monitored and any river levels are in addition to these wells. A Druk Inc. sensor (model PDRC 10/D) was placed at the bottom of the 3 meter by 15 cm PVC well tubes and calibrated to output depth from forest floor to groundwater. Sensors are scanned every 5 minutes and hourly averages are output to a storage module.

本研究于FP1A、FP2A及FP4A站点部署Campbell CR7型数据采集器（datalogger），在夏季生长季期间开展监测：其中仅FP4A站点同步监测河流水位，其余站点仅监测地下水。各站点均布设4口监测井，FP4A站点的河流水位监测为独立于监测井的额外监测项。在尺寸为3m×15cm的PVC监测井管底部安装了德鲁克公司（Druks Inc.）型号为PDRC 10/D的传感器，该传感器经校准后可输出林地表至地下水的深度数据。传感器每5分钟完成一次数据扫描，并将小时均值存储至存储模块中。