Análise quantitativa dos recursos hídricos no sistema Coremas Mãe d’Água localizado no sertão da Paraíba.

Abstract

Water is a vital resource for life, but the reality of water scarcity in quantity and quality is still far from an optimal scenario. For this, the adequate management of water resources is indispensable in the search for rationality, making necessary the use of tools that aid in the decision-making process, such as mathematical models. It is in this context that this research has as main objective to analyze the water behavior of the Coremas and Mãe de Água reservoirs, located in the city of Coremas - PB, respectively, located in the Piancó- Piranhas-Açu River Basin, using the network model of flow Acquanet. It was also used to obtain the natural flow values from 1963 to 2018, the Soil Moisture Accounting Procedure (SMAP). In the analysis of the simulation of the historical series from 1963 to 2018, in the two reservoirs, the target volume was observed in most of the months, and the maximum volume was reached in the periods of more abundant rainfall. There were periods when the minimum volume was reached, due to the few rains, a fact that has become more present in recent years. As for the demands in the scenario 1 simulation as two separate reservoirs, the behavior was similar for human supply, irrigation, industry and fish farming where they presented guarantees above 95%, for animal feed, reliability was around 97%, but none of them had full guarantee of their service, that is, none presented 100%, occurring failures for

all the demands in the reservoir Coremas and Mãe de Água. In the simulation of scenario 2 as a single reservoir, in the same rainy and drought periods, all the demands linked to the system, human supply, animal watering, irrigation, industry and fish farming, obtained 100% reliability. Therefore, the Coremas-Mãe d'água system, despite the water crisis experienced, is considered sustainable.