Author(s): M. Yura Kafiansyah; Anang M. Farriansyah
Linked Author(s):
Keywords: Equal; Iterative; Optimization; Release; Simulation
Abstract: The policy of reservoir release every time period is based on rule curve design. Conflict by inequal reservoir release is inevitable because there is a misconception on designing rule curve about equality. Pandanduri (29.690 mcm) is the biggest reservoir in Lombok river basin and had the common hydrological issue to fulfilling the demand of reservoir. With lack of annual inflow from the catchment area, Pandanduri had to irrigate 8,823 ha of 8 irrigation area and for maintaining the water storage for sustainability. In this case, Pandanduri reservoir is the object of study to prove that storage sustainability can be achieved by equalizing (with a precision limit) the end of storage period. The objective of this study is to maximize the release of Pandanduri reservoir. By equality concept and linear programming, iterative and recursive optimization of K factor on every time period is used to be the decision variable, with utilizing of Ms. Excel — VBA. The input data for simulation i.e., dependable flow (80%, 50%, and 20%) and using actual data for demand). The expected result of this research is maximum release across time period and also providing optimum storage for next year operations. The result of this study will be compared to the existing rule curve of Pandanduri. The conclusion, release on every time period is maximum and equal. At the end of the year, the model reaches for optimum storage to covering next year operation.
Year: 2018