River Pollution Alarm
Monitoring During Dam Restoration
A foundation and ground engineering company in the UK are restoring a derelict dam in order to stop it leaking. They plan to pump Bentonite (a type of impure clay) into the dry resevoir to create a watertight seal.
Multi-parameter water quality sonde, telemetry sytstem and Flowview.net.
A foundation and ground engineering company in the UK are restoring a derelict dam in order to stop it leaking. They plan to pump Bentonite (a type of impure clay) into the dry reservoir to create a watertight seal. This will hopefully allow the reservoir to be used again. The engineering company need to ensure that they are not pumping too much Bentonite when doing the repair work as this may cause it to be pushed out of cracks in the reservoirs wall and leak into the nearby river.
The water quality of the river will need to be closely monitored. A multi parameter sonde with a telemetry system
has been installed. It will be used to monitor pH, conductivity, level and temperature of the water. The data recorded by the sonde is uploaded to the Flowview.net web site every four hours to make the information easier to view without the user having to download manually.
The company have made use of the new email alert system at Flowview which allows our clients to set alert levels for each of their measurement parameters. In this instance alert levels have been set to warn engineers if pH and conductivity measurements reach certain levels which could mean that Bentonite is passing into the river.fig2. PT878GC used to measure landfill gas
The Equipment
A multi-parameter water quality sonde allows the user to measure up to 11 parameters at once and up to 15 parameters with optional sensors. The available parameters include level, temperature, pH/ORP, nitrate, dissolved oxygen, turbidity, conductivity, chloride and ammonia. The sonde has an onboard data logger with several different logging modes. The unit is battery powered and can be left in-situ for up to 12 months without any additional power.The Telemetry system is ideal for accessing data in remote locations.