Reliability in Multipurpose Reservoir Operation: Case Studies with Correlated Inflows: Fid-Bau Portal

Reliability in Multipurpose Reservoir Operation: Case Studies with Correlated Inflows

Schultz, Gert A.

Abstract Three techniques for the determination of reservoir system operating rules are discussed, all of which use reliability related performance indices (PIS) or figures of merit (FMS) as decision criteria. Two of the techniques were used in the context of consulting work for a river authority. The methods applied for finding adequate reservoir operating rules are optimization and simulation. While in the first case (Wupper river system) optimization is used such that an objective function for two non-commensurate objectives is optimized, in the second application (Dhünn river system) simulation is used in order to obtain operating rules which fulfill reliability requirements according to specified PIS for two purposes. In the first cast reliability PIS are not primary (but secondary) decision criteria since the objective function does not contain reliability related parameters. In the second situation no optimum operating rule was obtained since the decision was made on the basis of reliability PIS alone and no explicit optimization technique was applied. The third technique discussed combines multi-objective optimization (compromise programming) with various PIS, three of which are reliability related. In this way an optimum rule is determined such that all PIS are combined to form an optimum compromise FM.