This resource contains dissolved gas (O2, CO2, CH4) concentrations collected at three reach sections of New Hope Creek in Duke Forest, North Carolina. Dissolved oxygen (DO) was measured using high-frequency (15 minutes) sensors at 9 locations continuously from July 2023 to January 2024. CO2 and CH4 concentrations were measured from water samples collected during three sampling periods (July 20-August 3, September 20-26 in 2023, February 4-18 in 2024). 

File 'code_figures.R' is the R code to make Figure 3-6 from the uploaded data.

All data files are in '.csv' format. 

For all files, column 'reach' is reach sections (A, B, C), 'station' is sensor deployments at each reach section (1, 2, 3), and 'dist_down' is distance (m) from the most downstream sensor at each reach section (A3, B3, C3). Subdaily data of DO, temperature, and pressures for C3 was obtained from StreamPULSE (https://data.streampulse.org).

File 'gas_raw' contains CO2 and CH4 concentrations in both mass (uM; column 'CO2' and 'CH4') and percentage saturation (%; 'pct_CO2' and 'pct_CH4'). Columns 'CO2_excess' and 'CH4_excess' is the excessive gas concentration over equilibrium. This file also includes air temperature (°C). Column 'pool.run' indicates whether a sample was collected at a pool or run. 

File 'do_subdaily' contains continuous DO measurements (mg/L) from nine locations. This file also includes air pressure and water temperature, which were used to estimate DO concentration at equilibrium (column 'DO_sat'). It also contains pH measurements, which were collected intermittently, and discharge estimations (m3/s).

File 'flux_chamber' contains field-estimated flux estimations of two gases (CO2, CH4; ppm/m2/min). 

File 'elevation_raw' contains raw elevation data of ~12 km NHC reach, including all three study reaches. 'elev_unfilled' is the raw elevation extracted from a DEM, and 'elev' is depression-filled elevation values. 

File 'elev' contains elevation (m) profile of each reach section (~550 m). Column 'dist_C3' is the distance from the sensor station 'C3', which is the most downstream among nine sensors. Columns 'lat' and 'lon' are latitude and longitude. Columns 's3' to 's300' are channel slope values calculated at example distances.

File 'channel_survey' contains the result of field survey of channel geomorphology at each reach section. For the pool of reach 'C', we measured depth only at two sensor locations using a Deeper CHIRP 2 sonar sensor as a cross-sention survey was not possible due to deep water depth. Column 'dist_field' is the field-measured distance from the most downstream sensor (C3).

File 'sensor_info' contains coordinates of nine sensor locations as well as distances from C3 and whether sensors were located at pools or runs. 'dist_down' column was added to align the locations of sensors to the nearest gas sampling locations.