Continuous water quality data from the Arkansas River above John Martin Reservoir, Colorado, USA, 2020-ongoing

This data resource contains continuous water quality measurements (water temperature, specific conductance, turbidity, pH, dissolved oxygen) from the Arkansas River upstream of the John Martin Reservoir in southeastern Colorado, USA. These data support the U.S. Army Corps of Engineers (USACE) Albuquerque District Reservoir Operations by quantifying the delivery of sediment to John Martin Reservoir as well as the impacts of the reservoir on sediment retention and water quality. This site is located ~9.5 km downstream of the confluence of the Arkansas and Purgatory rivers. Data were collected using a YSI EXO3 sonde, deployed in an ~5’ aluminum casing bolted to a rock face. Discharge values for this site were obtained by combining data from the U.S. Geological Survey (USGS) sites named \"Arkansas River at Las Animas, CO (07124000)\" and “Purgatoire River Near Las Animas, CO (07128500),” both of which are located ~15 km upstream of the water quality station. Data collection is ongoing, with this release spanning August 25, 2020 through June 30, 2024.