Geology Reference
In-Depth Information
Figure 3.
Contour map of sigma (in m) with 40 measurement
points (500 m × 500 m)
a regular 4-mile (6.4 km) network, without affecting the present level of
accuracy. It also indicates that it is not practical to reduce the estimation
error in the water table surface uniformly throughout the region because to
do so would increase the cost of monitoring wells drastically. For example,
reducing the presently existing error by 50 percent throughout the area would
require 16 times more wells than the currently existing well network.
Table 2:
Comparison of
k
for the existing and revised network
Grid Size
Total Measurement
Min.
Max.
Mean
Variance
Point
500 m × 500 m
56
1.56
10.30
5.03
3.78
500 m × 500 m
40
2.34
10.17
5.32
3.19
250 m × 250 m
56
1.53
11.82
5.49
3.84
250 m × 250 m
40
1.57
11.56
5.77
3.26
