End Depth for Exponential Channels

by Nallamuthu Rajaratnam,
Durbakula Muralidhar,

Serial Information: Journal of the Irrigation and Drainage Division, 1964, Vol. 90, Issue 1, Pg. 17-40

Document Type: Journal Paper


An extensive investigation of the end depth problem for exponential channels is presented. General theoretical equations have been developed for all the cases. From a large number of carefully conducted experiments, the end depth ratio for horizontal free overfalls has been found to be 0.795 for the triangular shape and 0.772 for the parabolic shape. For sloping channels, the end depth ratio has been found to be a function of the relative slope. For the rectangular free overfall, it was found that the already available results for the confined case could be used with little error for the unconfined case also. Appendix I gives a direct solution to the end depth problem when the free overfall is used for flow measurement. Appendix II gives a two-parameter table for the normal depth in parabolic channels.

Subject Headings: Paraboloid | Slopes | Flow measurement | Free flow | Parameters (statistics)

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