Geology Reference
In-Depth Information
Answer
h
(
h
)
Number
h
(
h
)
Number
of pairs
of pairs
1
647.7
15
9
707.8
7
2
962.7
14
10
834.6
6
3
896.2
13
11
543.4
5
4
615.7
12
12
481.6
4
5
810.7
11
13
484.0
3
6
1116.5
10
14
1450.0
2
7
861.5
9
15
2592.0
1
8
565.8
8
Question 4.3
2.4 3.0 - 1.8 1.5 3.0 - 2.5
I-------- I-------- I-------- I-------- I-------- I-------- I-------- I
The numbers represent the tenors in percentage. Two values are missing.
Calculate the experimental variogram.
Answer
Note:
While calculating the variograms with missing values, the pairs
with missing values is omitted and it is not taken into consideration
while calculating the number of pairs.
h
0
1
2
3
4
5
6
7
(
h
)
0
0.45
0.52
0.60
0.22
0.18
0.13
0.01
Number of pairs
6
3
3
3
3
1
1
1
CONCLUSIONS
Geostatistical methods have found applications in many fields of Earth
Sciences and much more in hydrogeology. In this article, efforts have been
made to introduce the subject in a possible simple way by defining the basic
statistics utilized to develop the method, the basic mathematical derivations
required as well as a few critical comparisons between classical statistical
methods and that of geostatistical methods. Variography, the most important
component of the geostatistical methods, has been dealt with in details and
finally a number of examples of computing the variograms are presented for
demonstration purpose.
REFERENCES
Isaaks, H.E. and Srivastava, R.M., 1989. An Introduction to Applied Geostatistics,
Oxford Universtity Press, USA.
Marsily, G.De., 1986. Quantitative Hydrogeology: Groundwater Hydrology for
Engineers, Academic Press.
Matheron, G., 1963. Principles of Geostatistics,
Econ. Geol.
58:
1246-1266.
