Caracterização da qualidade da água da lagoa de Jijoca em Jijoca de Jericoacoara - CE

Abstract

The Jijoca’s Lagoon, is a coastal lagoon and is part of an environmental protection area (APA), with major tourist activity. Due to the increasing number of visitors, especially during vacations, the region may suffer environmental impacts. The characterization of water quality is one way of assessing the impacts caused by human interference in aquatic systems, enabling their management more adequately. This study aimed to characterize and evaluate the water quality of Jijoca Lagoon. The water collection was performed by means of scuba diving in apnea and cylinders, between November 2012 and July 2013, at two points of the pond; a tent in Buenas Views (P1) and another in urban areas (P2). Water samples were evaluated through physical-chemical analysis on Effluent and Water Quality Laboratory (EQUAL). According to the results, the nutrient concentrations are kept below prescribed by Resolution CONAMA n◦. 357/2005. The reactive silica showed high values values in the colon. The chloride behave uniformly, but with values above those permitted by resolution. The dissolved oxygen data remained close to the saturation value (% OD 7.6 mg / L) and within the standards required by CONAMA. The temperature was maintained at average to the region between 26.8 and 31.6. The pH values were low for all collections in the colon, revealing an acidic environment. Salinity was nil. It was concluded that in the period between 2012 and 2013, the quality Jijoca Pond water was suitable for recreation and fishing and did not show signs of discharge of sewage and eutrophication in Lake.