Development of a Spiral Flow Type Chute and Field Application

Abstract

It is very difficult to design and construct irrigation and drainage canals or chutes in steep slope areas as compared to plain areas, and the cost of construction becomes very high. This is due to the fluctuation of water surface caused by the subtle unevenness of the chute located in steep slope areas, where hydraulic characteristics that differ from the plain areas were observed, because flow with high velocity makes shock waves to take place at the curved portion of the wall of the chute and the ninning water overflows.
Therefore as a solution, this paper presents the development of a new spiral flow control structure of open canal type. The developed structure alters the rectangular canal into a arc shape canal to transform the upward jump energy into the revolved spiral flow energy. Such that it could be constructed at low cost compared to the conventional rectangular canals.