Several parameters define water masses such as:
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Temperature
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Pressure
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Salinity
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pH
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Dissolved oxygen
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Turbidity
Every parameter, pertaining to a definite context, is measured with a specific probe and technology (electrode cells, light beam…).
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Multi-parameters probes are operated following two methodologies :
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Survey from a vessel or a mobile (rov, auv, slocum glider...) for spatially located data sampling.
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Static recording with a sensor fixed to a support : quay, surface buoy, mooring line...
Data can be recovered by direct reading or recorded in the probe memory.
This long term continuous monitoring is performed trough the connection of the multi-parameter probe to an external data logging system.
That configuration allows then to retrieve data remotely (by wireless modem connections), or to manage alarms according to thresholds (e.g to trigger a sampler).
The data can be displayed as profiles, charts, graph or data base.
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Turbidity monitoring within environmental studies related to marine work.
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Quality of water: site surveys (harbour, oufall, beaches, lakes, dams...).
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Méditerranean sea monitoring and protection against land borne pollutions.
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Studies of salinity and temperature of water masses related to location and time.
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Supply of requested data to validate a digital model , in order to quantify the improvements on the environment of a discharge new managements .
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Monitoring of underground water table levels and surface waters.
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