Q (m³/s)

D (mm)

Upstream of the scour hole average slope

Average slope scour hole downstream

400.48

500

1/3

1/5

345.36

500

1/3

1/5

291.34

500

1/4

1/4

249.46

500

1/4

1/4

400.48

300

1/5

1/6

345.36

300

1/4

1/6

291.34

300

1/5

1/7

249.46

300

1/3

1/5

400.48

100

1/4

1/9

345.36

100

1/4

1/7

291.34

100

1/4

1/8

249.46

100

1/4

1/7

400.48

50

1/3

1/9

345.36

50

1/4

1/8

291.34

50

1/4

1/7

249.46

50

1/4

1/7