AN ANALYSIS OF LOCATION & ORIENTATION OF REPELLING SPURS IN RIVERS.

Abstract

SYNOPSIS e proble3 of river training is quite complea. In perhaps no other field of hydraulic engineering, the designer Is so much handicapped by the lack of knouledge of the basic factors involved. Out of the various river control measures, the most effective is by repelling or deflecting the river, by constructing a structure transverse to the river flow and extending from the bank into the main river;theee are called repelling apart,. Presently no design criterion is available to locate and orient the spurs at the correct place. The only course open to the field engineer is to refer the matter to model studios and uait for the results uhich are quite time consuming and costly. In this dissertation, perhaps for the first time, an effort has be made to collect the data of the spurs of Old cases and try to correlate dimensionless parameters to define spur's location, orientation and geometry. The data has been divided depending on discharge, control point and number of spurs proposed. Such a study will cater for all the variables met in nature in all possible permutations. Various curves have been given, 'which will serve as ready reckoner for spur orientation and design. Equations, after analysing the data dimensionally and statistically, have been evolved, to define spur length in terms of simple hydraulic parameters. A detailed hydraulic design of a spur, based on the proposed curves and equations, and structural design, based on established and proved-In-the-field methods has been given to serve as a guide for field engineers.