Management Model for Electrical Power Production and Flood buffering Reservoirs

Código

I-EBHE0197

Autores

Edelino Guilherme Foquiço

Tema

WG 2.6: Water systems analysis for integrated planning & management

Resumo

Along the riverine areas downstream of dams, important communities are located at high risk of flooding resulting from the management of reservoirs upstream. Dams are important structures with a great capacity to transform economies and provide security for local communities, countries and regions. While on the one hand they have the capacity to transform economies through the production of electrical power (a vital determinant on development of communities) and the capacity to provide security (through the protection and preservation of social and economic infrastructures), on the other hand they have the potential to negatively impact mainly on downstream communities located or that have social and economic infrastructures or develop their activities in areas prone to flooding. The problem of flooding downstream of dams, results from the combination of two determinants: poor management (characterized by the release of volumes of water capable of generating large flood waves in the middle of the rainy season) associated with the lack of reliable meteorological information or lack of confidence in the information provided. On the other hand, in an attempt to maximize the levels of electricity production, the management of the reservoir becomes conflicting because this maximization requires high volumes of water in the reservoir. Given this problem, the main objective of this work is to present a management model for multiple-use reservoirs (electrical power generation and peak flow buffering). This work was conducted based on information on inflow and outflow rates, volume stored in the reservoir at the beginning of the rainy season and under the assumption of the existence of a safe and reliable source of meteorological data using the Volume-Durance Curve Method (VDCM) as a basis for which restriction discharges were defined. From the simulations carried out with various flow rates, results were obtained that demonstrate that the advance availability of meteorological data on the rainfall amount of the next rainy season is essential for decision-making without significant losses in electrical power production and with excellent results in the process of lowering the flood wave downstream. With the model it was possible to demonstrate that it is possible to improve the management efficiency of reservoirs with multiple uses by preparing a storage volume on the eve of the next rainy season.