HYDRAULIC CHARACTERISTICS OF RISING SECTOR GATE FOR SAND SLUICEWAY

Abstract

Headworks(diversion weir) are defined as the facilities which divert water from a river into a canal for irrigation use. Many headworks will reach it in durability for the next 50 years. Therefore we clarified hydraulic characteristics and various performance of a new gate (rising sector gate for sand sluiceway) by hydraulic model tests. Rising sector gate is a shell type gate with a disk at both ends. In comparison with fixed wheel type gate, the following characteristics became clear; 1) coefficient of discharge was higher, 2) gate operation was simple, 3) removal area of sediment spread to 4 times, 4) the sound pressure level was reduced 20 dB, 5) reduction of around 10% in running cost was anticipated.