Geochemical data collected in river water and shallow groundwater in a subarctic region (Matane river, QC, Canada) ...

• Main Authors: Biehler, Antoine, Buffin-Bélanger, Thomas, Baudron, Paul, Chaillou, Gwénaëlle
• Format: Dataset
• Language: English
• Published: PANGAEA 2023
• Subjects: aquifer-river connectivity; Carbonate chemistry; inorganic carbon; radon; subarctic river system; Sample ID; Site; DATE/TIME; LATITUDE; LONGITUDE; Type; Location; ELEVATION; Radon-222; Radon-222, standard deviation; Temperature, water; Conductivity, electrical; pH; Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Alkalinity, total; Alkalinity, total, standard deviation; Carbon dioxide, partial pressure; Method comment; Piezometer; WGS84 EPSG4326; Automated level loggers Hobo U20-001 combined with DGPS elevation only for piezometers; Two RAD7 Alpha spectrometer Durridge Inc. in a series with an outgassing unit; Multiparametric probe 600QS, YSI Inc.; Multiparametric probe, YSI Inc., 600QS [calibrated with 1413µS/cm standard]; NBS values, Multiparametric probe 600QS, YSI Inc. calibrated with three NBS buffers with known pH values 4.00, 7.00, and 10.00; Flow injection analysis technique based on the method proposed by Hall and Aller, 1992 and calibrated with a reagent grade sodium bicarbonate NaHCO3 solution, 2 replicates by samples; GRAN titration on 50 mL water samples with a Metrohm 848 Titrino Plus device calibrated by comparison with a Dickson certified reference material, 3 replicates by samples; measured or calculated according to the "PCO2 method" column; "in-situ" refers to in situ measurments using a showerhead-type gas exchanger connected to a PCO2 logger CM-0001, CO2Meter, Inc; Subarctic
• Online Access: https://dx.doi.org/10.1594/pangaea.944092; https://doi.pangaea.de/10.1594/PANGAEA.944092

This study aims to quantify groundwater discharges and associated DIC and CO2 fluxes at a high- and low- resolution scales on the Matane River (Qc, Canada). The flux calculations were based on a dataset including radon-222 activities (i.e., 222Rn), and measurements of dissolved inorganic carbon (i.e., DIC), total alkalinity, CO2 partial pressure (i.e., PCO2), and pH. The low-resolution study was undertaken at the corridor scale (07/2017), while the high-resolution study focused on a ~800 m long meander reach (08/2017). At the corridor scale, for the 12 sampling points, river water was analyzed in a riffle and in a pool to better represent river sections. Groundwater was also sampled from 4 private wells and in 2 piezometers for the corridor scale study, and from 12 piezometers inserted into the 18 ha meander floodplain for the meander scale study. ... : PCO2 method: "TA-pH" and "DIC-pH" refer to calculated values with the fresh water compatible R package "Aquaenv" for experimental aquatic chemistry using the couples pH and total alkalinity or DIC respectively" ...