THE CALCULATION OF WATER RELEASE POLICY FOR BALOG-BALOG (PHILIPPINES) SINGLE MULTIPURPOSE RESERVOIR SYSTEM USING DDDP ANALYTICAL TECHNIQUE: I. MODEL DEVELOPMENT

Abstract

The monthly water release operating policy for a single multi-purpose reservoir system at each stage of development of the service area was defined using Discrete Differential Dynamic Programming (DDDP) optimization analytical technique and simulation model developed in a master program for a mainframe computer type. Irrigation and flood control were the primary and secondary purposes, respectively, of the reservoir system with hydroelectric power generation as the by-product of the system's operation.
The recorded (historical) monthly streamflow data used in the study was subjected to the following analyses prior to generating a number of sequences of 50-year monthly streamflow data, namely: identification of probability distribution that best described the recorded streamflow data, and the determination of trend and periodicity using the 3-Parameter Log-Normal (3PLN) probability distribution function (pdf) and power spectrum analysis, respectively. The Thomas-Fiering streamflow model was used to generate the sequences of 50-year monthly streamflow data.