Table 6 Values of threshold velocities (U cr and u cr ).

From: The effect of tetrahedron framed permeable weirs on river bed stability in a mountainous area under clear water conditions

No.

U cr (cm/s)

u cr (cm/s)

Upstream

Downstream

Upstream

Downstream

1

63.24

62.45

56.01

54.34

2

64.66

57.59

58.59

48.22

3

58.17

57.75

50.83

48.98

4

61.99

56.52

55.35

48.22

5

60.40

56.03

54.34

47.06

6

57.06

56.46

50.83

47.84

  1. Note: U cr  = threshold average velocity; u cr  = threshold near-bed velocity.
Back to article page