Detection of Water

 

Measurements for detecting water migration in landfills are usually carried out in an area of approximately 1 000 to 10 000 m2. For 3D-animations of waster migration, 3D-setup measure at time intervals, approximately twelve times per day. If necessary, an initial large-scale scanning over a larger area of resistivity or other geophysical method to be done to facilitate the choice of site for further investigations.

 

Resistivity and induced polarization (IP) are non-destructive geophysical methods to measure sub-surface electrical properties by electrical current being transmitted between electrodes placed at the surface. Underground zones containing gas are signaled by relatively high resistivity, which means a high resistance to current, while zones with relatively high water content are signaled by lower resistivity. Research has also shown that zones with high gas content and migration of gas is signaled by high resistivity variation over time, due to the gas and water interaction in the soil pore system. Therefore, sub-surface landfill gas migration can be detected in the ground by measuring the change in resistivity over time.

Results of measurements to detect the presence of water can be used for example to:

 

• Optimize the placement of landfill leachate drainage

• Test of soil liner efficiency in landfill soil covers

• Mapping groundwater levels

• Estimating zones of high and low water content in landfills

 

For further information, please contact:

 

Håkan Rosqvist at hakan.rosqvist(at)tyrens.se

Torleif Dahlin at torleif.dahlin(at)tg.lth.se

Mats Svensson at mats.svensson(at)tyrens.se

 

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NULLAM LOBORTIS FUSCE

 

Copyright (c) 2012 MaLaGa. All Rights Reserved.

Håkan Rosqvist at hakan.rosqvist(at)tyrens.se

Torleif Dahlin at torleif.dahlin(at)tg.lth.se

Mats Svensson at mats.svensson(at)tyrens.se