Groundwater well pressure, temperature, conductance, salinity and oxygen measurements for GCE-LTER study hammock HN_i_1 from 30-Oct-2008 to 03-Dec-2013

Groundwater pressure, temperature and other parameters (e.g. conductance, salinity, oxygen and pH) were measured using various instruments installed in PVC wells at the GCE-LTER HN_i_1 holocene study hammock from 30-Oct-2008 to 03-Dec-2013. Observations were logged continuously at 15 minute intervals, and accumulated data were downloaded from loggers using manufacturer-provided communications software semi-monthly, then imported into MATLAB for post-processing, quality control and documention. Raw, unvented pressure readings were corrected for atmospheric pressure and sensor height from the bottom of the well to generate corrected pressure readings. Separate data tables are provided for each combination of instrument and well due to differences in parameters measured and post-processing steps, but all tables include detailed information on location and well characteristics to support integration and analysis. These data were collected as part of the Georgia Coastal Ecosystems LTER Intensive Hammock Characterization and Hammock Groundwater Modeling projects, and will be used for groundwater modeling studies at two marsh hammocks on Sapelo Island, Georgia.

2008年10月30日至2013年12月3日期间，研究团队于佐治亚海岸生态系统长期生态研究（Georgia Coastal Ecosystems LTER, GCE-LTER）的HN_i_1号全新世研究沼台地的聚氯乙烯（PVC）井中安装多类监测仪器，对地下水压力、温度及电导率、盐度、溶解氧、pH值等相关参数开展观测。监测以15分钟为间隔连续记录数据，研究人员每半月借助仪器厂商提供的通信软件从数据记录仪中下载累计观测数据集，随后将数据导入MATLAB进行后处理、质量控制与文档整编。原始非通气式压力读数需针对大气压力与传感器距井底部的安装高度完成校正，以生成修正后的压力监测值。由于不同仪器与井组的监测参数、后处理流程存在差异，本数据集按仪器与井的组合分别提供独立的数据表，但所有数据表均包含详细的点位信息与井体特征参数，以支撑后续的数据整合与分析工作。本数据集为佐治亚海岸生态系统长期生态研究「密集型台地特征表征」与「台地地下水模拟」项目的采集成果，将用于佐治亚州萨佩洛岛两处沼台地的地下水模拟研究。