Supporting groundwater salinity data used for salinity mapping adjacent to the Lost Hills and Belridge oil fields, Kern County, California

This dataset contains summarized historical groundwater salinity observations from wells near the Lost Hills and Belridge oil fields in the southwestern San Joaquin Valley, Kern County, California. Total dissolved solids (TDS) concentration, electrical fluid conductivity (EC), and well construction information were aggregated from public data sources and local water management agencies. Trends in total-dissolved solids (TDS) concentrations and fluid conductivity were assessed on a well-by-well basis to develop a dataset of salinity observations to support the interpretation of resistivity data derived from an airborne electromagnetic (AEM) survey flown in October 2016. Results of the trend analysis were used to identify wells that were stable with respect to three salinity categories between 2004 and 2014: fresh (TDS less than 3,000 mg/L), brackish (TDS between 3,000 and 10,000 mg/L), and saline (TDS greater than 10,000 mg/L). Salinity observations considered to be contemporary with respect to the AEM survey (2015-2018) are also included in this dataset.本数据集汇总了美国加利福尼亚州克恩县圣华金谷西南部失落山（Lost Hills）油田与贝尔里奇（Belridge）油田周边井位的历史地下水盐度观测数据，其中总溶解固体（Total dissolved solids，TDS）浓度、流体电导率（Electrical fluid conductivity，EC）及井身结构信息均从公开数据源与地方水利管理机构汇总得到。研究团队以单井为单元评估了总溶解固体浓度与流体电导率的变化趋势，以此构建盐度观测数据集，用于辅助解读2016年10月航空电磁（Airborne electromagnetic，AEM）测量所得的电阻率数据。通过趋势分析结果，研究人员识别出2004至2014年间盐度稳定处于三类区间的井位：淡水类（总溶解固体浓度低于3000毫克/升）、微咸水类（总溶解固体浓度介于3000至10000毫克/升之间）以及咸水类（总溶解固体浓度高于10000毫克/升）。本数据集同时纳入了与此次航空电磁测量时间匹配的2015至2018年盐度观测数据。