A High Space-Time Resolution Dataset Linking Meteorological Forcing and Hydro-Sedimentary Response in a Mesoscale Mediterranean Catchment (Auzon) of the Ardèche Region, France

Friday, 18 December 2015: 14:40
3020 (Moscone West)
Guillaume Nord1,2, Isabelle Braud3, Brice Boudevillain1,4, Simon Gérard5, Gilles Molinié1,4, Jean-Pierre Vandervaere6, Jessica Huza3,7, Jérome Le Coz3, Guillaume Dramais3, Cédric Legout1,4, Alexis Berne8, Jacopo Grazioli8, Tim Raupach9, Joel Van Baelen10, Annette Wijbrans1,4, Guy Delrieu1,5, Julien Andrieu11, Martin Caliano1,4, Coralie Aubert4, Ryan Teuling7, Raphaël Le Boursicaud3, Flora Branger3, Béatrice Vincendon12 and Ivan Horner3, (1)LTHE Laboratoire d'étude des Transferts en Hydrologie et Environnement, Grenoble, France, (2)University Joseph Fourier Grenoble, Grenboble, France, (3)IRSTEA Lyon, Villeurbanne Cedex, France, (4)University Joseph Fourier Grenoble, Grenoble, France, (5)CNRS, LTHE, Grenoble, France, (6)LTHE Laboratoire d'étude des Transferts en Hydrologie et Environnement, Saint Martin d'Hères, France, (7)Wageningen University, Wageningen, Netherlands, (8)Swiss Federal Institute of Technology Lausanne, Lausanne, Switzerland, (9)EPFL Swiss Federal Institute of Technology Lausanne, Lausanne, Switzerland, (10)Laboratoire de Météorologie Physique Observatoire de Physique du Globe de Clermont-Ferrand, Aubiere Cedex, France, (11)University Nice Sophia-Antipolis, UMR ESPACE, Nice, France, (12)Météo-France, CNRM-GAME, Toulouse Cedex 01, France
A comprehensive hydrometeorological dataset is presented spanning the period 1 Jan 2011-31 Dec 2014 to improve the understanding and simulation of the hydrological processes leading to flash floods in a mesoscale catchment (Auzon, 116 km2) of the Mediterranean region. The specificity of the dataset is its high space-time resolution, especially concerning rainfall and the hydrological response which is particularly adapted to the highly spatially variable rainfall events that may occur in this region. This type of dataset is rare in scientific literature because of the quantity and type of sensors for meteorology and surface hydrology. Rainfall data include continuous precipitation measured by rain-gages (5 min time step for the research network of 21 rain-gages and 1h time step for the operational network of 9 rain-gages), S-band Doppler dual-polarization radar (1 km2, 5 min resolution), and disdrometers (11 sensors working at 1 min time step). During the special observation period (SOP-1) and enhanced observation period (Sep-Dec 2012, Sep-Dec 2013) of the HyMeX (Hydrological Cycle in the Mediterranean Experiment) project, two X-band radars provided precipitation measurements at very fine spatial and temporal scales (1 ha, 5 min). Meteorological data are taken from the operational surface weather observation stations of Meteo France at the hourly time resolution (6 stations in the region of interest). The monitoring of surface hydrology and suspended sediment is multi-scale and based on nested catchments. Three hydrometric stations measure water discharge and additional physico-chemical variables at a 2-10 min time resolution. Two experimental plots monitor overland flow and erosion at 1 min time resolution on a hillslope with vineyard. A network of 11 gauges continuously measures water level and temperature in headwater subcatchments at a time resolution of 2-5 min. A network of soil moisture sensors enable the continuous measurement of soil volumetric water content at 20 min time resolution at 9 sites. Additionally, opportunistic observations (soil moisture measurements and stream gauging) were performed during floods between 2012 and 2014. The data are appropriate for understanding rainfall variability, improving areal rainfall estimations and progress in distributed hydrological modelling.