CDFLOW - A 30-year dataset on CO2 in flowing freshwaters in the United States

CDFLOW consists of CO2 estimates in flowing freshwaters across the lower 48 US states from 1990 through 2020. CO2 estimations were generated by downloading US water quality data, including pH, temperature, and total alkalinity measuments and using the USGS program PHREEQC to estimate CO2. Site data for CDFLOW was generated by spatially joining lat/long data from the dowloaded water quality data with the EPAs NHDPlus dataset to the nearest streamcatchment feature. NHDPlus streamcatchment features are geometric features of unique stream sections denoted by a unique COMID code. For a more detailed look at the creation of this dataset view (link in progrees). <br> To download data generating code and supplemental R scripts use github link below: <br> https://github.com/ttoavs/CDFLOW