ORE OMERE
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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 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.
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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.
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These data correspond to a non-systematic monitoring of dissolved, particulate or total organic carbon contents in water (rain, surface overflow, underground water) in the Roujan catchment area.
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Geological map of the Roujan catchment area ( 1/5000 scale), modified from the official BRGM geological map (1/50000 printed map number 1015)
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Evaluation of pesticides contents in cultivated soils in the Roujan catchment area.
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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.
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Pesticide contents are determined on the suspended matter extracted by filtration (0,7µm) in runoff water. Contents allow quantification of particula transport of pesticides and allow too compare it to solute transport.
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Isotope analysis of groundwater, rainfall and surface water in the Roujan watershed area. Samples of rainfall accumulated over a day or an event as well as instantaneous samples of runoff and groundwater are sent to a specialized laboratory to determine their oxygen 18 and deuterium contents.