Vallon de Nant glacier and tributary discharge and water quality data from summer and autumn 2023 (isotopic composition, electrical conductivity, water temperature, discharge)
Creators: name: Meier, Anna
name: Helfer, Martine
name: Ceperley, Natalie
name: Schaefli, Bettina
Publisher: name: Zenodo
Year: 2024
Subjects: subject: ephemeral stream
subject: intermittent stream
subject: tributary
subject: Glacier
subject: glacial melt
subject: glacier melt
subject: stable isotope
subject: oxygen-18
subject: deuterieum
subject: oxygen-17
subject: electrical conductivity
subject: water
subject: streamflow
subject: water temperature
subject: meteorology
subject: Meteorology
subject: headwater
subject: catchment
subject: freshet
subject: snow
subject: water quality
subject: glacier des Martinets
subject: Vallon de Nant
subject: Swiss Alps
subject: Vaud Alps
subject: master thesis
subject: Thesis

description: This upload includes the original data from two master theses from the headwater catchment Vallon de Nant in the Vaud Alpes (Switzerland) focusing on glacier melt and tributary streamflow. The collected data refers to the sampling period of summer and autumn 2023 (June to October), including stable isotopic composition of water (and snow and ice), electrical conductivity, water temperature, streamflow discharge volumes and meteorological conditions. The data collection was mostly a collaboration of the two authors and should therefore be referred to as such. Additionally, both theses are available for more detailed information on sampling procedures, sensors descriptions and data processing.

Martine Helfer's thesis focusses on tributary water contributions in the upper (southern) Vallon de Nant in terms of discharge quantity (salt dilution method) and water composition by means of stable isotopic composition of streamflow, electrical conductivity and water temperature monitored by the HOBO pendant temperature sensors. 

Anna Meier's  thesis deals with the study of the outflow of the Glacier des Martinets, located in the southern basin of Vallon de Nant. A weather station and drainage station measure continuously: wind, temperature, rainfall, humidity, solar radiation, water temperature, electrical conductivity, drainage. These data are supplemented with continuous HOBO pendant temperature measurements and a few salt dilution discharge measurements and the isotope ratios of individual water samples.

Following data files are available and contain measurements of various natural tracers, streamflow discharge and meteorological parameters:



The "measuring_station.csv" file includes recordings from the installed meteorological weather station at LV95 2573713E, 1118375N from the end of July to the end of October 2023 (25.07.2023 to 19.10.2023). For a more detailed description of the sensors and calculated discharge consult the chapter "Data and Methods" form Anna Meier's thesis. Column description:



datetime [dd.mm.yyyy hh:mm]

discharge [l/s]: calculated discharge from the measured water level

air_temperature [°C]: at approximately 2m from ground 

relative_humidity [%]

windspeed [m/s]

precipitation_tot [mm]: total recorded precipitation

solar_radiation [W/cm2]

water_temperature [°C]

water_conductivity [µS/cm]



 



The "quality_variables" file includes all water quality measurements from the sampling period. Column description:



datetime [dd.mm.yyyy hh:mm]

dDmean [‰]

d18Omean [‰]

d17Omean [‰]

dDstd [-]

d18Ostd [-]

d17Ostd [-]

detex [‰]

location [-]: defined in"location_metadata" or if referred as GLA in gps_x and gps_y

gps_x [LV95]: latitude of the GLA location

gps_y [LV95]: longitude of the GLA location

aggregate [-]: description of sample type, aggregate state of water 

depth_snow_ice [cm]: how deep the sample was taken

date_of_analysis [dd.mm.yyyy]

EC_WTW [µS/cm]: electrical conductivity measured with the digital muliparameter portable meter WTW in the field

temperature_WTW [°C]: water temperature measured with the digital muliparameter portable meter WTW in the field

EC_Lab [µS/cm]: electrcal conductivity measured in the Laboratory 

temperature_lab [°C]: water temperature measured in the Laboratory



 



The "long-term_water temperature" file includes the long-term water temperature monitoring data of the tributaries recorded by the HOBO pendant temperature sensors. For sensor description and missing data values consult chapter "Data" from Martine Helfer's thesis. Column description: 



location [-]: defined in the file "location_metadata"

datetime [dd.mm.yy hh:mm]

temperature [°C]: recorded water temperature in degree celsius 



 



The "discharge_tributaries" file includes the calculated and corrected discharge measuremnents from the tributaries. Discharge was calculated by means of the salt dilution method. Column description:



location [-]: defined in "location_metadata"

datetime [dd.mm.yy hh:mm]

Q_corr [l/s]: corrected discharge values in liter per second



 



The "location_metadata" file includes the metadata from the sampling spots and therefore referes to the column "location" in the other files (i.e. discharge_tributaries, long-term_water temperature, quality_variables). Column description:



location [-]

latitude [WGS84]

longitude [WGS84]

elevation at location [m.a.s.l.]: elevation at location in meter above sea level



 

Keywords: tributaries, ephemeral streams, intermittent streams, glacial melt, summer, Swiss Alpes, Vaud Alpes, stable isotopic composition, electrical conductivity, discharge volume, water temperature, meteorological conditions, headwater catchment, snow freshet, water quality, Glacier des Martinets, Vallon de Nant, master thesis.