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Table 3 Some formulas used in fuzzy rules

From: Early warning of impending flash flood based on AIoT

Rule number

Input

Output

Rainfall intensity (RI)

Water speed (WS)

Water level (WL)

Steeper slopes (SS)

Warning system

1

Small

Very slow

Low

Very low

Normal

2

Moderate

Very slow

Low

Very low

Normal

3

Moderate

Slow

Low

Very low

Normal

4

Moderate

Average

Average

Average

Cautious

5

Heavy

Average

Average

Average

Cautious

6

Moderate

Fast

Average

Average

Cautious

7

Heavy

Fast

Average

Average

Cautious

8

Heavy

Fast

High

High

Dangerous

9

Storm

Fast

High

High

Dangerous

10

Large Storm

Fast

High

High

Dangerous