Author:
Ciptadi R,Rahardjo A P,Kamulyan B
Abstract
Sei Teras Village has been developing aquaculture since 2006 and has fresh and saltwater sources. Recently, there has been a plan for upgrading the traditional extensive ponds to intensive ones. It is expected to cultivate vannamei shrimp, which delivers a better return. An average of 5-15% of the total water volume in the ponds is recommended to be replaced every day to keep the water quality within the range of the requirements. This study aims to find an alternative design and operation of pond gates for better use of tides for fishpond water leaching. Measurements were carried out for topography, tides, and current boundary conditions for calibration. The flow simulations on the fishpond irrigation network are modeled with two scenarios of pond water gate size and variations in the number of fishpond gates operated simultaneously using HEC-RAS software. Flow simulation is carried out to determine the process of entering and leaving water into ponds. The results of the simulations are evaluated based on their water replacement capacity and changes of discharge and water level at the control point. The initial results show that wider gate opening increases the capacity of water replacement and simultaneous opening operation gives the maximum result.