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Ohio University (1990)

Optimal reservoir operation for drought management

Kleopa, Xenia A.

Titre : Optimal reservoir operation for drought management

Auteur : Kleopa, Xenia A.

Université de soutenance : Ohio University

Grade : MS, Civil Engineering (Engineering), 1990

This study will develop an optimization model for determining a set of optimal reservoir releases in a multireservoir system at varied levels of drought severity. Levels of drought severity will be defined by using streamflow, precipitation, temperature, ground water, and lake level from available stations in the basin under consideration. Since there is a considerable amount of data involved, the assessment of drought severity will be performed by computer. A computer program will assess the drought severity level by comparing the input daily data with respective truncation levels. The duration of a drought event will be updated daily and used as a factor for drought assessment. The probability of transition from an existing drought event to a more severe one will also be considered for drought assessment. A complete definition will be proposed for drought assessment. An optimization model for reservoir operation at different levels of drought severity will be developed. The model is based on probabilistic inflows and water demands at do,wnstream control points. Since the model is designed for periods of drought, the objective function and constraints should reflect the idea of resource conservation. Thus, the objective is to release the minimum possible amount of water from each reservoir that will satisfy the douwnstream demands. Minimizing the water release implies the conservation of water storage for a better water balance during the period of a drought. The system constraints include maximum possible release based on water storage and reservoir inflows, minimum water release imposed by truncated demand values for each of the downstream control points, and minimum release requirements for each reservoir. The proposed model is applied to a system of four reservoirs in the Scioto River Basin, in Central Ohio. The four reservoirs are owned and operated by the U.S. Army Corps of Engineers. A map of the Scioto River Basin is given in Figure 1.1.

Mots-clés : Optimal reservoir operation ; Drought management


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