OPTIMIZATION OF THE MRICA RESERVOIR MANAGEMENT AT BANJARNEGARA REGENCY USING A DETERMINISTIC DYNAMIC PROGRAM (FOR ELECTRICITY PRODUCTION AND IRRIGATION WATER)

A Sastrawan¹, L Makrup¹, Ruzardi¹, and S Fadilah^1*

¹Department of Civil Engineering, Universitas Islam Indonesia, Yogyakarta, Indonesia

[1]* Corresponding author’s email: [email protected]

DOI: https://doi.org/10.20885/icsbe.vol4.art21

ABSTRACT

Siltation becomes the Mrica reservoir’s main problem that causes the reduction of the effective storage capacity of the dam, so it cannot function properly. This research aims to obtain the optimal Reservoir Operating Rules that can produce maximum electrical power in hydropower and fulfill the irrigation water requirements as designed according to the existing reservoir capacity. The optimization method used in this research is a Deterministic Dynamic Program, assuming the event occurs as a certain occurrence. In this procedure, the existing constraints divide into multi-stages with decision variables at each stage. The analysis starts from a backward to a forward recursive to get the water storage and release maximum used as a recommendation to design the effective Reservoir Operation Rules. It was simulated using three scenarios, including Scenario 1 (Q IR optimization=actual); Scenario 2 (Q IR optimization=design); and Scenario 3(Q IR generate optimization=demand). Based on the benchmarking analysis results, the percentage of design, actual, and optimized Reservoir Operation Rules were 98.08%, 98.29%, and 99.04%, respectively, which indicates the design Reservoir Operational Rules performance is not better than others. Besides that, Scenario 2 has the highest profit of Rp 76350527181 and fulfills regulation No. 7 of 2004 concerning water resources.

Keywords : Optimization, Reservoir, Management

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