A variety of optimization models have been developed in the last decades to solve complex problems in water resources management. Thought that some of these methods are unreliable and do not improve the water resources management problem in reality, it is thus essential to investigate and compare the capabilities of these models. One of the most general and well-known optimization problems in water resources is the Dynamic Programming (DP) which can be solved using continuous and/or discrete solution approaches. Since the discrete solution techniques is computationally burden and inefficient in complex problems, the continuous solution techniques takes much attention recently. In this paper a continuous solution of dynamic programming model, called Constraint State (CS) method is adopted to solve a problem related to reservoir operation and its results are compared with those obtained from two different discrete solution methods, called DP and SDP methods. The reliability of these techniques for reservoir operation is investigated using a set of reliability indices. The results show that the CS solution method can even improve the reliability of system, as a comparison with the SDP method.

A continuous solution for optimal reservoir operation problem using the constraint-state technique

A real-time operational methodology has been developed for multipurpose reservoir operation for irrigation and hydropower generation with application to the Bhadra reservoir system in the state of Karnataka, India. The methodology consists of three phases of computer modelling. In the first phase, the optimal release policy for a given initial storage and inflow is determined using a stochastic dynamic programming (SDP) model. Streamflow forecasting using an adaptive AutoRegressive Integrated Moving Average (ARIMA) model constitutes the second phase. A real-time simulation model is developed in the third phase using the forecast inflows of phase 2 and the operating policy of phase 1. A comparison of the optimal monthly real-time operation with the historical operation demonstrates the relevance, applicability and the relative advantage of the proposed methodology.

S Mohan

Papers

Real-time multipurpose reservoir operation: a case study / Exploitation en temps reacuteel d'un reservoir agrave buts multiples: eacutetude d'un cas