Sensor-based water-quality and stable isotopes of water data collected along the Upper Colorado River, 2020-24

This data release contains sensor-based water-quality and discrete stable isotopes of water data collected along the Upper Colorado River. Data collection was made by the University of Colorado at Boulder, Colorado (CO), and the U.S. Geological Survey (USGS) in Lakewood, CO. The water-quality data were collected from an inflatable raft during 5 high flow and 3 low flow sampling campaigns from June 2020 to October 2024. Discrete stable isotopes of water samples were collected every 3-5 river kilometers during the 2022-2024 sampling campaigns. Surveys were generally completed over a 480-kilometer reach of the river, from Pumphouse, CO to Potash, Utah (UT). In addition, a longer reach of the river through Cataract Canyon, UT was sampled during the June 2020 campaign, and a shorter reach of the river from Palisade, CO to Westwater Ranger Station, UT was sampled during the June-July 2021 campaign. Sensor-based water quality analytes collected during the surveys included water temperature, specific conductance, pH, nitrate as nitrogen, turbidity, and dissolved oxygen. Data files provided here include the sensor-based water-quality data as a comma-separated value (.csv) file (ucol_sensor_data.csv), and the discrete stable isotopes of water data as a .csv file (ucol_isotopes.csv).