Determination of support in soil sampling
Short-range variation of measurements of a soil characteristic is a function of the support (i.e., size, shape, and orientation of the physical sample taken at a sample point) of the soil samples. This short-range variance often shows up as a substantial component of the ''nugget effect'' in experimental semivariograms or estimated generalized covariance functions. Proper choice of support may substantially reduce short-range variance (or nugget) of measurements made at sample points and thereby reduce estimation variance in point or block kriging based on these measurements. Appropriate variance formulas and an example are given for determination of support when support is an array of vertical cores (or bucket auger samples) of equal depth and diameter.
- Research Organization:
- Univ. of Nevada, Las Vegas, NV
- OSTI ID:
- 7166903
- Journal Information:
- Math. Geol.; (United States), Vol. 18:6
- Country of Publication:
- United States
- Language:
- English
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LAND POLLUTION
KRIGING
SAMPLING
SOILS
ACCURACY
COMPUTER CODES
COMPUTERIZED SIMULATION
DATA COVARIANCES
DRILL CORES
OPTIMIZATION
STATISTICAL MODELS
MATHEMATICAL MODELS
MATHEMATICS
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SIMULATION
STATISTICS
510200* - Environment
Terrestrial- Chemicals Monitoring & Transport- (-1989)