By-wash spillways for farm dams

Lai, K.K.; Stone, D.M.; Hattersley, R.T.

By-wash spillways for farm dams

Report (1966)

Authors

K.K. Lai

D.M. Stone

R.T. Hattersley

Affiliation

None

Erosion Grass Overflow Spillway

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Published Date

01-06-1966

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Source:

Water Research Laboratory Report nr. 89

Abstract

Model studies formed a basis for investigating the hydraulics of bywash spillways for farm darns When constructed in natural earth such spillways are trapezoidal in cross section The surface of the spillway needs protection from scour and this protection is usually in the form of grass. These tests extended to variations in spillway geometry and variations in surface roughness. The effects of these variations on head discharge relationships were noted. The variation of discharge with head over the range of spillway surface lengths and the range of roughnesses tested was less than 10 pc. of the average discharge. The report contains recommendations for the design of new spillways and examples indicating the design procedure are given.

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