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Table 8 Membership calculation (condition 4)

From: Risk assessment methodology for iron stability under water quality factors based on fuzzy comprehensive evaluation

Water quality factor

Value

Slight risk (vslr)

Small risk (vsmr)

General risk (vger)

Greater risk (vgrr)

Significant risk (vsir)

Chloride

159.2 mg/L

0

0

0.3160

0.6840

0

Sulfate

132.69 mg/L

0

0

0.8462

0.1538

0

DOC

5.35 mg/L

0.1625

0.8375

0

0

0

pH

6.85

0

0

0.2000

0.8000

0