Runoff and stream flow discharge monitoring in the Roujan catchment area (Hérault) is operational since 1992 at catchment and sub-catchments hydrological stations on which automatic sensors records water level time series on a long-term and continuous basis.

The data from these sensors are collected and instantaneously transmitted to servers in Montpellier.

Verification and correction processes on the raw data, as well as the generation of elaborated data (e.g. calculation of flows from water heights or modification of time steps) are applied before integration of the data sets into the HYSAE database.

The water level and discharge time series can be downloaded from an interactive map through the OMERE data portal accessible from this page.