Application of Information Entropy to Assessment Environmental …
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For the environmental subsystem, the ENV1 (Dissolved Oxygen—mg/L) indicator presented the lowest entropy (64.73%) and higher information weight (0.2241),
followed by ENV2 (Total Coliforms—NMP/100 mL), at 71.58% entropy and 0.1805
weight information. These indicators represented 40.46% of the total information
weight for this subsystem.
3.2 Subsystem Weighting
The subsystem weights (Zh) are presented in Table 4. The subsystems displayed
similar weights for both study areas. At GD1, the social subsystem presented 0.2446
weight, the economic subsystem, 0.3964 and the environmental subsystem, 0.3590.
Table 4 Environmental
Sanitation Sustainability
Condition (CSS) indicators at
GD1 and GD8
Period GD1 (Alto Rio Grande) GD8 (Baixo Rio Grande)
Social indicators of sustainable development
Zh
0.2446
0.2539
2008
0.5444
0.3507
2010
0.3541
0.5897
2012
0.2750
0.2614
2014
0.1379
0.1117
Economic indicators of sustainable development
Zh
0.3964
0.3935
2008
0.3929
0.6617
2010
0.2265
0.1353
2012
0.5805
0.6586
2014
0.9252
0.5780
Environmental indicators of sustainable development
Zh
0.3590
0.3526
2008
0.2316
0.5041
2010
0.3800
0.5198
2012
0.5708
0.5041
2014
0.7423
0.2952
Environmental Sanitation Sustainability Condition Index
(CSS)
2008
0.3721
0.5271
2010
0.3128
0.3861
2012
0.5023
0.5033
2014
0.6070
0.3603