Groundwater levels and ion concentrations in saprolite wells at Redlair Observatory, North Carolina, 2019-2020

Groundwater levels, temperatures, and chemistry were monitored in 14 wells at Redlair Observatory, a Critical Zone research site on the Piedmont region of North Carolina, from March 5, 2019 to August 5, 2020. Groundwater levels and temperatures from 5 wells were recorded continuously at 10-minute resolution and barometrically compensated using an onsite barometric logger. Groundwater levels were manually recorded monthly from 9 additional wells. 14 groundwater samples were collected quarterly from 14 wells and 4 stream baseflow samples were collected from seasonally flowing first-order watersheds. Groundwater chemical parameters in this data resource include pH, temperature, ion concentrations (calcium, sodium, magnesium, potassium, chloride, nitrate, phosphate, sulfate), silica concentrations, and alkalinity concentrations. In addition, hydrogen and oxygen isotope ratios (δD, δ18O) are reported for 69 groundwater samples and carbon isotope ratios of dissolved inorganic carbon (δ13C-DIC) are reported for 14 samples.

本数据资源对位于北卡罗来纳州皮德蒙特地区的关键带研究站点Redlair观测站的14口地下水井进行了监测，记录时间从2019年3月5日至2020年8月5日。其中，5口井的地下水位和温度以每10分钟一次的分辨率连续记录，并使用现场气压计进行气压补偿。另外9口井的地下水位每月手动记录一次。从14口井中每季度收集14个地下水样品，并从季节性流动的一级流域中收集了4个基流样品。本数据资源中包含的地下水化学参数包括pH值、温度、离子浓度（钙、钠、镁、钾、氯、硝酸盐、磷酸盐、硫酸盐）、硅浓度和碱度浓度。此外，对69个地下水样品报告了氢和氧同位素比值（δD、δ18O），对14个样品报告了溶解无机碳碳同位素比值（δ13C-DIC）。