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Frame - Weighting Factors in the Selection of Wabash Basin Probability Monitoring Sites
This example presents the 1988 Frame information for Wabash Basin Streams and initial Design weights for a sample size of 50, with equal sample sites within Strahler stream order.
Sum of stream reach length (meters) and initial design weights by strahler order
| Strahler Order | Upper Wabash
|
Percent
|
Initial Weight (in km)
|
1 length (m)
|
4514450.0
|
58.9
|
368.5265
|
2 length (m)
|
1443260.0
|
18.84
|
117.8171
|
3 length (m)
|
740145.6
|
9.7
|
60.42005
|
4 length (m)
|
660294.2
|
8.6
|
53.90157
|
5 length (m)
|
187620.2
|
2.4
|
Non-Target
|
7 length (m)
|
117727.1
|
1.5
|
Non-Target
|
Total
|
7663497
|
100.0
|
|
Target
|
7358150
|
96.0
|