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Research Group in Environmental Physics

Environmental Physics Laboratory

Multiparametric probe: CTD probe that allows the properties of a column of water to be defined with great accuracy. It is equipped with depth, temperature, conductivity (salinity), dissolved oxygen, fluorescence, cloudiness and PAR sensors. It is an essential device to understand water quality. It works as a water column profiler.

5-Channel fluorimeter: This instrument gives information on the temperature and chlorophyll concentrations of 5 different populations of phytoplankton in situ and at different depths as a pressure sensor is attached. It incorporates 5 LEDs that emit different wavelengths to allow to populations of diatoms, green algae, cryptophytes, and others, to be identified. The range of chlorophyll concentration for each wavelength is between 0.03 and 100  µg·L-1.

Pressure sensors: These sensors provide information on small scale, very high frequency water level variations. They allow temporary evolutions of the water level to be monitored for long periods of time.

Turbidity instrument: This instrument measures turbidity at five points with high frequency and accuracy. It can monitor turbidity during long periods of time.

Particle concentration and sedimentation speed system (LISST): Laser in situ scattering and tranmissometry. The device measures the concentration of particles in volume within a specific range of diameters (from 5 to 600 microns). The device consists of a laser that records the distributions of particles at a specific point using the light diffracted by the particles. It can profile a column of water or be used during a high frequency monitoring phase. The device allows organic and inorganic particle transport processes to be described in situ, mainly such as currents of density and particle resuspension.

Two independent ADVOcean-Hydra Sontek acoustic doppler velocimeters, measuring three dimensional ADV speeds through field measurements. The velocimeter measures the speeds in a point with high resolution. It can measure unattended and in submerged mode, so it is essential for taking measurements both inside and outside the plant beds.

Two MICROADV 18 MHz, Sontek laboratory speed measurers. 3D downward-facing velocimeter, 25 cm arm, 5 cm in sample volume. This device has to measure the speed of the fluid at a point to determine the turbulent speeds and the turbulent kinetic energy outside and in the zones with submerged plants and emergent plants. Its design allows vertical profiles to be taken.

Sedimentation traps consist of stainless steel supports for 6 sampling tubes that can be placed at the desired depth for collecting sediment.

Three experiment channels (recirculation, swell and turbulence).

Three reactors with Daphnia magna culture (3 years old).

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