Return period (year)

2

5

10

25

50

100

500

Peak flow formula [47]

Q₂ =

60.3A^0.649

Q₅ =

123A^0.627

Q₁₀ =

174A^0.617

Q₂₅ =

245A^0.606

Q₅₀ =

309A^0.600

Q₁₀₀ =

380A^0.594

Q₅₀₀ =

550A^0.583

Q (m³s⁻¹)

12.0

22.9

31.5

42.9

53.2

64.2

76.9

Maximum discharge m³s⁻¹ by Pearson type-III (1965-1976)

15.9 (±3.2)

25.1 (±3.9)

30.6 (±5.1)

37.0 (±7.4)

41.5 (±9.5)

45.7 (±11.8)

Minimum discharge m³s⁻¹ by Gumbel distribution

0.035

0.031

0.026

0.021

0.017

0.010