A high space–time resolution dataset linking meteorological forcing and hydro-sedimentary response in a mesoscale Mediterranean catchment (Auzon) of the Ardèche region, France ; Un jeu de données à haute résolution spatiale et temporelle reliant forçage météorologique et réponse hydro-sédimentaire dans le bassin méso-échelle de l'Auzon (Ardèche, France)

[Departement_IRSTEA]Eaux [TR1_IRSTEA]ARCEAU The contract of Simon Gérard was funded by the Institut National des Sciences de l’Univers (INSU/CNRS). ; International audience ; A comprehensive hydrometeorological dataset is presented spanning the period 1 January 2011-31 December 2014 to improve the understanding of the hydrological processes leading to flash floods and the relation between rainfall, runoff, erosion and sediment transport in a mesoscale catchment (Auzon, 116 km 2) of the Mediterranean region. Badlands are present in the Auzon catchment and well connected to high-gradient channels of bedrock rivers which promotes the transfer of suspended solids downstream. The number of observed variables, the various sensors involved (both in situ and remote) and the space-time resolution (∼ km 2 , ∼ min) of this comprehensive dataset make it a unique contribution to research communities focused on hydrom-eteorology, surface hydrology and erosion. Given that rainfall is highly variable in space and time in this region, the observation system enables assessment of the hydrological response to rainfall fields. Indeed, (i) rainfall data are provided by rain gauges (both a research network of 21 rain gauges with a 5 min time step and an operational network of 10 rain gauges with a 5 min or 1 h time step), S-band Doppler dual-polarization radars (1 km 2 , 5 min resolution), disdrometers (16 sensors working at 30 s or 1 min time step) and Micro Rain Radars (5 sensors, 100 m height resolution). Additionally, during the special observation period (SOP-1) of the HyMeX (Hydrolog-ical Cycle in the Mediterranean Experiment) project, two X-band radars provided precipitation measurements at Published by Copernicus Publications. 222 G. Nord et al.: High-resolution hydrometeorological data in a mesoscale Mediterranean catchment very fine spatial and temporal scales (1 ha, 5 min). (ii) Other meteorological data are taken from the operational surface weather observation stations of Météo-France (including 2 m air temperature, ...