Water level data during pumping for stressed HPFM measurements for selected boreholes near GMH Electronics Superfund site, Roxboro, NC (2012-2015)

The collection of borehole geophysical logs and images and continuous water-level data was conducted by the U.S. Geological Survey South Atlantic Water Science Center in the vicinity of the GMH Electronics Superfund site near Roxboro, North Carolina, during December 2012 through July 2015. The study purpose was part of a continued effort to assist the U.S. Environmental Protection Agency in the development of a conceptual groundwater model for the assessment of current contaminant distribution and future migration of contaminants. Previous work by the U.S. Geological Survey South Atlantic Water Science Center at the site involved similar data collection, in addition to surface geologic mapping and passive diffusion bag sampling within monitoring wells (Chapman and others, 2013). The continued data compilation efforts included the delineation of more than 900 subsurface features (primarily fracture orientations) in 10 open borehole wells. Geophysical logs, borehole imagery, pumping data, and heat-pulse flow measurements were collected and are presented within this data release. The data on this page consists of .csv and .xlsx files with water-level information collected from a pressure transducer within the borehole during pumping conditions for the "stressed" heat-pulse flow measurements. The water-levels were used for drawdown calculations.

2012年12月至2015年7月，美国地质调查局（U.S. Geological Survey）南大西洋水科学中心在北卡罗来纳州罗克斯伯勒市附近的GMH电子超级基金（Superfund）场地周边开展了钻孔地球物理测井、钻孔成像及连续水位数据采集工作。本研究作为持续工作的一部分，旨在协助美国环境保护署（U.S. Environmental Protection Agency）构建概念地下水模型，以评估当前污染物分布及污染物未来迁移情况。此前美国地质调查局南大西洋水科学中心在该场地开展的相关工作包含类似的数据采集，同时还进行了地表地质填图及监测井内的被动扩散袋采样（Chapman等人，2013）。本次持续的数据汇编工作在10口裸眼钻孔井中圈定了900余个地下特征（主要为裂缝走向）。本次采集并在本数据集发布中呈现的数据包括地球物理测井、钻孔成像、抽水数据及热脉冲流量测量数据。本页面包含的数据集为.csv与.xlsx格式文件，涵盖了为开展“受激”热脉冲流量测量，在抽水工况下从钻孔内压力传感器采集得到的水位信息。上述水位数据可用于水位降深计算。