The monitoring of suspended sediment loads in runoff and stream flows aims to quantify the amount of sediments translocated during runoff events. These measurements contribute to the understanding and the quantification of the soil redistribution induced by water erosion processes. The measurements of suspended matter are made through manual and automated water sampling at the hydrological stations, which are then processed and analysed in the laboratory to derive suspended sediment concentrations. A turbidimeter has been recently installed to complete the time series of sediment discharge. Suspended sediment concentrations are integrated into the HYSAE database, they can subsequently be consulted and downloaded via the OMERE data portal.

water samples ( rain, runoff, underground water) are carried in icebox and frozen. ( FILTRATION ? ). Samples are analyzed by a dedicated laboratory, that quantify a set of parameters including from 1 to 430 pesticide active ingredients and their metabolites.

The thematic map provided allows you to visualise the measurement points concerning this data acquisition device. This map is accessible via a standardised WMS flow, but also enables the data sets associated with the measurement point to be downloaded, depending on the case, via the ORE OMERE data portal.

A flow tower is installed on the watershed of Roujan as well as a meteorological station of the AgroClim service unit (INRAE). At these points a set of sensors are arranged in order to collect various meteorological variables such as wind speed, air humidity and temperature, global radiation or evapotranspiration. Just like the other measurements made on the basin by sensors, data acquisition units record the values which are transmitted several times a day to our servers at the INRAE centre in Montpellier or retrieved via Agroclim's webservice. R routines are then used to process these data and prepare them for integration into the HYSAE database of the LISAH, thus integrating them into the information system for OMERE. Through the OMERE data web portal, the address of which is given in this fact sheet, the data can be consulted and downloaded.

The water table depth from the soil surface is measured at different points in the Roujan catchment. In Roujan site, the groundwater is shallow with a free surface water table rising and falling in the soil and subsoil layers. The measurements are made at different points in the catchment with piezometers. A piezometer is a perforated PVC tube at its base installed in the soil through a borehole. In every piezometer, the water table depth is measured by manual piezometric probe or monitored at high frequency (~15') with autonomous and automatic probe integrating acquisition units. Through the OMERE data portal accessible from this website, the data can be downloaded from an interactive map.

The water table depth from the soil surface is measured at different points in the Kamech catchment. In Kamech site, the groundwater is shallow with a free surface water table rising and falling in the soil and subsoil layers. The measurements are made at different points in the catchment with piezometers. A piezometer is a perforated PVC tube at its base installed in the soil through a borehole. In every piezometer, the water table depth is measured by manual piezometric probe or monitored at high frequency (~15') with autonomous and automatic probe integrating acquisition units. Through the OMERE data portal accessible from this website, the data can be downloaded from an interactive map.

The physico-chemical parameters measured in the Roujan basin and accessible via the data portal concern the measurement of elements such as pH, redox potential, temperature and conductivity, carried out during sampling in the basin.

The groundwater temperature is measured at different points in the Kamech catchment. In Kamech site, the groundwater is shallow with a free surface water table rising and falling in the soil and subsoil layers. The measurements are made at different points in the catchment with piezometers. A piezometer is a perforated PVC tube at its base installed in the soil through a borehole. In every piezometer, the groundwater temperature is monitored at high frequency (~15') with autonomous and automatic temperature probe integrating acquisition units. Through the OMERE data portal accessible from this website, the data can be downloaded from an interactive map.

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.