High-frequency water quality data for Dead Run, Baltimore County, MD, USA

This resource includes water quality sensor data measured at multiple locations in Dead Run, Baltimore County, Maryland. Stream temperature, specific conductance, turbidity, dissolved oxygen, pH, and nitrate data are collected for multiple purposes including (1) computation of watershed-scale export mass fluxes; (2) evaluation of event-based water quality /discharge behavior, and (2) stream metabolism calculations. Data are collected using various instruments including (1) YSI 6920 V2 sondes outfitted with temperature, specific conductance, and dissolved oxygen sensors; (2) YSI EXO2 sondes outfitted with temperature, specific conductance, dissolved oxygen and pH sensors; (3) Onset Inc. U24-001 conductivity/ temperature and U26-001 dissolved oxygen data loggers; and (4) SUNA nitrate-nitrogen analyzers. Data are collected at a 5-minute interval (SUNAs at a 30-minute interval) and either telemetered to UMBC (YSI sondes and SUNAs) or downloaded manually every 60 days (Onset loggers). The instruments are co-located with either USGS or UMBC stream gaging stations. This data set is part of the Urban Critical Zone Cluster in the NSF Critical Zone Collaborative Network and is associated with the Gwynns Falls sensor data set supported by Department of Energy. Dead Run data are backlogged to 2010 and are being reviewed and uploaded in ~2023-2024.