Table 6 The entropies and weight values of physical-chemical parameters.

From: Aquatic ecosystem health assessment of a typical sub-basin of the Liao River based on entropy weights and a fuzzy comprehensive evaluation method

Parameters

2011

2018

Entropy

Weight

Entropy

Weight

TP (mg/L)

0.92643

0.20011

0.77594

0.34636

NH4+-N (mg/L)

0.92881

0.19364

0.94381

0.08686

COD (mg/L)

0.93728

0.17061

0.90110

0.15289

BOD5 (mg/L)

0.89642

0.28173

0.84542

0.23896

DO (mg/L)

0.94341

0.15391

0.88683

0.17494

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