Source

Denotation

Dmax (mm)

Fines content (%)a

Finer fraction (%)b

Cu = d60/d10

Performance in terms of internal erosion

Rönnqvist and Viklander [14]

4

16

16 (21)

30

40

No observationsc

11

16

10 (11)

20

8

No observationsc

17

16

32 (35)

28

39

No observationsc

22

16

24 (28)

39

75

No observationsc

26

16

18 (21)

28

30

No observationsc

37

64

38 (54)

32

133

No observationsc

45

128

11 (15)

16

19

No observationsc

54

64

18 (35)

21

133

No observationsc

A

150

32 (53)

33

1357

Probable occurrenced

L

20

19 (24)

35

60

Probable occurrenced

N

150

20 (34)

28

200

Probable occurrenced

P

16

12 (16)

35

32

Probable occurrenced

S

180

11 (18)

35

53

Probable occurrenced