Continuous water quality data from the Arkansas River below 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 downstream 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 impacts of the reservoir on sediment retention and water quality. This site is located immediately downstream of the U.S. Geological Survey (USGS) site named \"Arkansas River Below John Martin Reservoir, Co. (07130500).\" Data were collected using a YSI EXO3 sonde, deployed in an ~8’ aluminum casing bolted to a concrete weir face and connected to a Campbell Scientific CR300 datalogger powered by a photovoltaic system. Data collection is ongoing, with this release spanning August 25, 2020 through June 30, 2024.