SYSTEMS ANALYSIS OF MULTIRESERVOIRS

Abstract

Vision of any engineer involved in water resource project planning is optimal utilisation of available water resources. This has resulted in initiation of various techniques aiming at defining means and methods of achieving the objective. One such technique to look at water resource projects is through the systems approach wherein the reservoir and other auxiliary works are considered as a system and each component of this system is then decomposed into different subsystems with their appropriate linkages. This facilitates the planning engineer to look at the system from a closer angle and understand the functioning of each and every subsystems and hence the system as a,whole in a better way. Eventhough there are many ways to deal with systems approach in water resource project planning, viz., (i) direct problems involving analysis, estimation and prediction (ii) indirect problems involving identification and. detection and (iii) simulation problems involving identification and analysis, the simulation approach is perhaps the most widely used method for evaluating alternative water resource systems. The reason for its simplicity lies in it mathematical simplicity and versatility. In this method the essential characteristics of the system are reproduced in a model which is then studied in an appropriate time -scale. The model is formed using arithmetic and algebraic relationships along with logical processes. Computer simulation is more efficient and time saving to deal with large volume of data. Water resource projects are planned aiming at deriving certain. objectives. This could be meeting certain social needs like increase in crop production, municipal and industrial needs, power generation, flood control, meeting navigational and recreational needs, etc. rir The very acceptance of a project proposal depends on the benefit that is expected to be accrued on implementation of the project. Hence the thrust is on optimisation of benefit from the project. The main direct benefit from a project aimed at irrigation is from the increase in revenue accrued through enhanced production from crops grown. Naturally the planners endeavour is on optimisation of produce, One of the most widely used technique for optimisation of benefit from irrigation is the Linear Programming (LP) approach. LP involves formulation and solution of certain type of managerial problems by optimising a linear objective function subject to linear constraints.