Methods for detecting and locating leaks in containment facilities using electrical potential data and electrical resistance tomographic imaging techniques
- Livermore, CA
- San Antonio, TX
- Alamo, CA
Methods are provided for detecting and locating leaks in liners used as barriers in the construction of landfills, surface impoundments, water reservoirs, tanks, and the like. Electrodes are placed in the ground around the periphery of the facility, in the leak detection zone located between two liners if present, and/or within the containment facility. Electrical resistivity data is collected using these electrodes. This data is used to map the electrical resistivity distribution beneath the containment liner between two liners in a double-lined facility. In an alternative embodiment, an electrode placed within the lined facility is driven to an electrical potential with respect to another electrode placed at a distance from the lined facility (mise-a-la-masse). Voltage differences are then measured between various combinations of additional electrodes placed in the soil on the periphery of the facility, the leak detection zone, or within the facility. A leak of liquid though the liner material will result in an electrical potential distribution that can be measured at the electrodes. The leak position is located by determining the coordinates of an electrical current source pole that best fits the measured potentials with the constraints of the known or assumed resistivity distribution.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- DOE Contract Number:
- W-7405-ENG-48
- Assignee:
- Leak Location Services, Inc. (San Antonio, TX)
- Patent Number(s):
- US 5661406
- OSTI ID:
- 871121
- Country of Publication:
- United States
- Language:
- English
Comparing Reconstruction Algorithms for Electrical Impedance Tomography
|
journal | November 1987 |
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Related Subjects
detecting
locating
leaks
containment
facilities
electrical
potential
data
resistance
tomographic
imaging
techniques
provided
liners
barriers
construction
landfills
surface
impoundments
water
reservoirs
tanks
electrodes
placed
ground
periphery
facility
leak
detection
zone
located
resistivity
collected
map
distribution
beneath
liner
double-lined
alternative
embodiment
electrode
lined
driven
respect
distance
mise-a-la-masse
voltage
differences
measured
various
combinations
additional
soil
liquid
material
result
position
determining
coordinates
current
source
pole
fits
potentials
constraints
assumed
potential distribution
leak detection
electrical potential
electrical resistance
electrical current
electrical resistivity
current source
alternative embodiment
resistivity distribution
various combinations
voltage difference
zone located
voltage differences
tomographic imaging
liner material
electrode placed
imaging techniques
additional electrode
additional electrodes
locating leaks
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