Avaliação do processo de evaporação em açudes do Rio Grande do Norte

• Autor(a) principal: Nascimento, Letícia Aquino do
• Data de Publicação: 2017
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UFRN
• Texto Completo: https://repositorio.ufrn.br/handle/123456789/40682
• topic: açude; evaporação; regra de operação

This work evaluates the effects of evaporation in two reservoirs of the northeastern semi-arid region, the Cruzeta (RN) reservoir and the Engenheiro Armando Ribeiro Gonçalves reservoir (RN). The water loss for this phenomenon was estimated by two methods, the empirical method of Jensen-Haise and the method of Tank Class A. The results generated showed that the reservoirs have a high annual evaporation rate. The Cruzeta dam represents an annual evaporation of 30% to 50% of its maximum volume, and the Armando Ribeiro Dam being between 10% and 18%. With regard to precipitation, it was verified that the Brazilian northeast is characterized by few rains with small volumes during the year, which are lower than the volumes evaporated from the dams. As for the uses granted, it was proved that the Cruzeta dam is underutilized, considering that the annual withdrawal volumes are around 10% while their evaporation reaches up to 50%. While in the Armando Ribeiro reservoir this difference is not so great, because it is a large reservoir and contains larger demands, but still has considerable evaporation rates in most of the period analyzed. The results also showed that the methods used returned similar evaporation values for the semi-arid waters. Therefore, it is necessary to study the phenomenon to predict the proper location of new reservoirs, as well as to ensure the efficient management of the reserved waters of existing ones.