ABSTRACT:

This resource includes stream chemistry data from 260 sampling locations and 4 dates (2018-2019). We collected this data at a high spatial resolution, every 50 to 100m, along 13km of streams in six agricultural headwater catchments (1.1-3.5km²). We used the Transcender portable device (Causse et al. 2017, Causse and Thomas 2020) to measure nitrate, dissolved organic carbon, temperature, oxygen, conductivity and turbidity in all 1040 sampling locations x dates. Eleven complementary parameters were also measured in the laboratory for 239 sampling locations x dates. Full data description in Dupas et al. (accepted)

Causse, J., and O. Thomas. 2020. Intérêt de la mesure de la qualité des cours d’eau à très haute résolution pour une meilleure gestion des bassins versants. Technique Sciences et Méthodes April:13-20.
Causse, J., O. Thomas, A. V. Jung, and M. F. Thomas. 2017. Direct DOC and nitrate determination in water using dual pathlength and second derivative UV spectrophotometry. Water Research 108:312-319.
Dupas, R., J. Causse, A. Jaffrezic, L. Aquilina, P. Durand. Flowpath controls on high-spatial-resolution water-chemistry profiles in headwater streams. Hydrological processes, accepted. DOI: 10.1002/hyp.14247

ABSTRACT:

This resource includes water quality samples collected within the Yvel catchment (375 km²), located in northwestern France. These data were collected to with the purpose of evaluating the spatial variations in water chemistry across the river network of a mesoscale catchment. We collected river grab samples every two weeks for 18 months (31 dates). We measured 17 water chemistry parameters for all water samples, including different forms of P (soluble reactive phosphorus [SRP], total dissolved phosphorus [TDP], total phosphorus [TP]), C species (dissolved organic carbon [DOC], dissolved inorganic carbon (DIC)), anions (NO3-, NO2-, F-, Br-, Cl-, SO42-), physicochemical parameters measured with in-situ sensors (temperature, pH, dissolved O2, conductivity), aromaticity, and specific ultra-violet absorbance at 254 nm [SUVA254]. Methods implemented for sample collection and analysis are described within the resource.