DESAIN DAN ANALISIS MEKANISME BENDUNG GERAK DENGAN RADIAL GATE UNTUK PENANGANAN BANJIR ROB

Abstract

Tidal floods are high tides that occur excessively on the mainland. Radial gate weir
is a door building that moves around in a cylindrical shape to regulate the water
level elevation. This study aims to determine the influence factor of the radial gate
movement weir mechanism, analyze the fluid mechanics of the radial gate during
tidal flooding. This research is experimental design research, namely, making a
prototype design of the radial gate motion weir mechanism and analysis of
parameter data in the form of hydrostatic pressure, hydrodynamic pressure, critical
flow, and sub critical flow. The conclusion of this study is, the design is planned to
work when: the automation system runs because the two proximity sensors touch the
30 cm water level, activate the linear actuator to close the radial gate, the water
pump turns on and 15 cm opens the radial gate, the water pump stops. The results of
parameter data analysis: hydrostatic pressure of water level 30 cm = 32.0 N/m2,
hydrodynamic pressure due to earthquake according to (DSI) in Cilacap = 0.1211
tf/m2, BMKG SIG (III/Light)= 33,600 tf/m2, (IV/ Medium)= 96.075 tf/m2,
(V/Weight)= 148.3125 tf/m2. Critical flow rate of water level is 15 cm = 0.0149
m3/second, sub-critical flow rate is 0.0098 m3/second.