SIMULATION OF THE RAKNAMO RESERVOIR OPERATION BY USING LINEAR PROGRAMMING

Abstract

This research intends to build the simulation of the Raknamo reservoir operation as to adaptation to the climate change impact in the semi-arid area. The methodology consists of the simulation for building the reservoir operation to produce the optimal result. The optimization and simulation were carried out in the Raknamo dam that is located in the Raknamo village-Amabi Oefeto district-Kupang regency-NTT province. The development of the Raknamo dam is intended to fulfill the demands of irrigation water, raw water, and mini-hydro electrical generation. The water service is prioritized for irrigation that needs the water about 1.05 m3/s (1,050 l/s) through the water intake channel, which is flowed to rotate the turbine that will produce the electricity about 0.21 MW. The total of water that is needed including the raw water is 0.1 m3/s (100 l/s). The analysis results show that the water availability is unbalanced with the large outflow demand. This means that there is happened the water deficit in the certain periods. Therefore, it is needed to be carried out the optimization of the water operation pattern. The result shows that the relationship of inflow-outflow in the Raknamo reservoir indicates that the outflow curve is under the inflow curve and that part of the points in the outflow curve touches the inflow points. Mathematically, the result shows the optimal condition. The simulation of the Raknamo reservoir operated from 1993 to 2018 due to the dependable discharges of 80%, 70%, 60%, and 50%.