Resumo:
Reservoirs are one of the main ways to shape the hydrological cycle by storing water for future uses. In this context, small reservoirs play a strategic role in water supply in communities around the world and especially in Brazil, since they increase water availability during the dry season. For this to happen, it is fundamental to have a better knowledge of the different processes that interfere in the hydraulic dynamics of these structures. The present dissertation aims to use the water balance methodology together with the application of the GoldSim software to assist the planning of small storage dams with respect to water catchment guarantee. Furthermore, to propose a methodological guide for this purpose. To elucidate the proposal, a case study was conducted on the Brejo Grande Dam in Paraisópolis, Minas Gerais. As a result, it was possible to project the behavior of the water level in the structure according to the variation of the withdrawal flow in a planning horizon. Thus, in order not to reach the operational restriction and to maintain the guarantee of water withdrawal during the three years of the simulated period, the flow demand should remain in the range between 100 m³/h and 110 m³/h.
