Cokriging model for estimation of water table elevation
- Calvin College, Grand Rapids, MI (USA)
- Oak Ridge National Lab., TN (USA)
In geological settings where the water table is a subdued replica of the ground surface, cokriging can be used to estimate the water table elevation at unsampled locations on the basis of values of water table elevation and ground surface elevation measured at wells and at points along flowing streams. The ground surface elevation at the estimation point must also be determined. In the proposed method, separate models are generated for the spatial variability of the water table and ground surface elevation and for the dependence between these variables. After the models have been validated, cokriging or minimum variance unbiased estimation is used to obtain the estimated water table elevations and their estimation variances. For the Pits and Trenches area (formerly a liquid radioactive waste disposal facility) near Oak Ridge National Laboratory, water table estimation along a linear section, both with and without the inclusion of ground surface elevation as a statistical predictor, illustrate the advantages of the cokriging model.
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6950009
- Journal Information:
- Water Resources Research; (USA), Journal Name: Water Resources Research; (USA) Vol. 25:3; ISSN 0043-1397; ISSN WRERA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
54 ENVIRONMENTAL SCIENCES
540310* -- Environment
Aquatic-- Basic Studies-- (1990-)
CALCULATION METHODS
KRIGING
LEVELS
MANAGEMENT
MATERIALS
MATHEMATICAL MODELS
MATHEMATICS
NATIONAL ORGANIZATIONS
ORNL
RADIOACTIVE MATERIALS
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTES
STATISTICS
STREAMS
SURFACE WATERS
TESTING
US AEC
US DOE
US ERDA
US ORGANIZATIONS
VALIDATION
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES
WATER TABLES