Authority for Formula.

Inclination.

1 in 50

1 in 150

l in 80

1 in 250

1 in 500

1 in 100

1 in 300

1 in 750

l in 500

1 in 1500

1 in 1500

1 in 3000

Chezy .........

55

32

248

140

99

1253

723

457

3170

1830

5043

3563

Eytelwein........

55

32

248

140

99

1256

725

458

3180

1833

5054

3.577

Neville ........

63

35

290

157

106

1509

826

490

-

-

-

-

Weisbach .........

60

34

268

148

102

1357

779

478

3431

1910

5344

3376

Box (hydraulics)

51

31

240

137

97

1230

705

448

-

-

-

-

Darcy...........

61

35

286

162

113

1485

860

533

3816

2202

6072

4274

Kutter .........

41

24

225

127

90

1133

654

414

3340

1925

5750

4020

Santo Crimp ......

51

29

259

147

103

1472

850

533

4181

2375

6891

5033

6-in.

stoneware.

12-in. stoneware.

24-in. brick.

48-in. brick.

72-in. brick.