Imprecise (fuzzy) information in geostatistics
Conference
·
· J. Int. Assoc. Math. Geol.; (United States)
OSTI ID:6294926
A methodology based on fuzzy set theory for the utilization of imprecise data in geostatistics is presented. A common problem preventing a broader use of geostatistics has been the insufficient amount of accurate measurement data. In certain cases, additional but uncertain (soft) information is available and can be encoded as subjective probabilities, and then the soft kriging method can be applied (Journal, 1986). In other cases, a fuzzy encoding of soft information may be more realistic and simplify the numerical calculations. Imprecise (fuzzy) spatial information on the possible variogram is integrated into a single variogram which is used in a fuzzy kriging procedure. The overall uncertainty of prediction is represented by the estimation variance and the calculated membership function for each kriged point. The methodology is applied to the permeability prediction of a soil liner for hazardous waste containment. The available number of hard measurement data (20) was not enough for a classical geostatistical analysis. An additional 20 soft data made it possible to prepare kriged contour maps using the fuzzy geostatistical procedure.
- Research Organization:
- Univ. of Waterloo, Ontario (Canada)
- OSTI ID:
- 6294926
- Report Number(s):
- CONF-8704137-
- Conference Information:
- Journal Name: J. Int. Assoc. Math. Geol.; (United States) Journal Volume: 20:4
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
CLAYS
CONSTRAINTS
DATA COVARIANCES
DIAGRAMS
ENVIRONMENTAL TRANSPORT
FILTRATION
FORECASTING
GEOPHYSICAL SURVEYS
HAZARDOUS MATERIALS
INDUSTRIAL WASTES
INFORMATION NEEDS
KRIGING
LINERS
MANAGEMENT
MAPPING
MASS TRANSFER
MATERIALS
MATHEMATICAL MODELS
MATHEMATICS
PERMEABILITY
POLLUTION
PROGRAMMING
SEPARATION PROCESSES
SET THEORY
SITE SURVEYS
SOILS
STATISTICAL MODELS
STATISTICS
STORAGE
SURVEYS
WASTE DISPOSAL
WASTE MANAGEMENT
WASTE STORAGE
WASTES
WATER POLLUTION
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
CLAYS
CONSTRAINTS
DATA COVARIANCES
DIAGRAMS
ENVIRONMENTAL TRANSPORT
FILTRATION
FORECASTING
GEOPHYSICAL SURVEYS
HAZARDOUS MATERIALS
INDUSTRIAL WASTES
INFORMATION NEEDS
KRIGING
LINERS
MANAGEMENT
MAPPING
MASS TRANSFER
MATERIALS
MATHEMATICAL MODELS
MATHEMATICS
PERMEABILITY
POLLUTION
PROGRAMMING
SEPARATION PROCESSES
SET THEORY
SITE SURVEYS
SOILS
STATISTICAL MODELS
STATISTICS
STORAGE
SURVEYS
WASTE DISPOSAL
WASTE MANAGEMENT
WASTE STORAGE
WASTES
WATER POLLUTION