Environmental monitoring facilities
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Soil moisture assessment in different areas of the Kamech catchment area is carried out using soil tensiometry measurements carried out on different areas and at different depths of the Kamech site.
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The evaluation of soil moisture in different areas of the Roujan catchment area is carried out by measuring the moisture content of fresh soil samples.
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Evaluation of pesticides contents in cultivated soils in the Roujan catchment area.
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A meteorological station and a flow tower have been installed in the Kamech watershed. Through these two stations, a set of sensors is arranged to collect various meteorological variables. The meteorological station, installed in 1998, is equipped with sensors that are placed two meters above the ground. These sensors allow the acquisition of global radiation, wind speed and direction, air temperature and humidity, atmospheric pressure. The instruments used are: pyranometer, anemometer (A100R, vector), wind vane (W200P), thermohygrometer (HPM45C, vaisala), barometer (CS100, Setra). The flow tower or micro-meteorological station, installed in 2010, is equipped with sensors installed at 10 meters from the ground, allows to measure the real evapotranspiration (ETR) by the turbulent covariance method. This method is based on high frequency measurements (10 to 20 measurements per second) of vertical wind speed, air temperature and air humidity. The instruments used are: sonic anemometer (CSAT3, Campbell Sc), icor 7500, air temperature and humidity (HMP45, vaisala). Additional sensors measuring temperature, relative humidity and speed are installed at 2 m height from the ground allowing to have a second point of measurement of the meteorological variables on the BV. A data acquisition system calculates and stores the average values over 30-minute time intervals. The data are collected by the staff of INRGREF of Tunis. They are processed, prepared in the format of integration in the database HYSAE of LISAH to be integrated into the information system of OMERE Through the OMERE data web portal, the address of which is given in this fact sheet, the data can be consulted and downloaded.
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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.
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The physico-chemical parameters measured in the Kamech basin and accessible via the data portal concern the electrical conductivity of the water.
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The rainfall of the Roujan (Hérault) catchment area has been acquired since 1992 through various measuring points on which sensors are positioned on a long-term and continuous basis. The data from these sensors are directly recorded on servers in Montpellier through remote transmission. Verification treatments and possible corrections are applied before the data sets are integrated into the HYSAE database. Through the OMERE data portal accessible from this sheet, the data can be downloaded from an interactive map. In addition to these raw data rainfall records, a so-called "synthetic" time serie is elaborated to provide a complete and uninterrupted chronicle of rainfall data representative for the catchment area.
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Water sampling in rain, runoff and undergroundwater are performed on the fields and send to a specialized laboratory to quantify major elements contents (Ca, Mg, Na, K, SO4, PO4, HCO3, NO3) ( FILTRATION ???. PH ??? ? EC, ???)
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Contents of trace metals in water (rain, run off, underground waters ) on the Roujan catchment area.
Regular sampling of surface water, rainwater or groundwater is carried out in the Roujan catchment area. These samples are sampled and analysed in order to assess the content of trace metals in the waters of the basin.