ALTERAÇÃO DAS CONCENTRAÇÕES DE NITROGÊNIO E FÓSFORO NA BACIA DO RIO APODI-MOSSORÓ EM FUNÇÃO DOS EFEITOS DA ESTIAGEM E ESPACIALIDADE

Resumo

The river Apodi-MossoroÌ, Brazil's second largest river, has suffered great losses because of its high pollution, as a result of the anthropic action around it and conditions that involves. Among the various pollutants, which affect the River, the present work proposes to relate the content of nitrogen and phosphorus compounds with the flow the water catchment area of the river Apodi-MossoroÌ has suffered in the last five years. For the same colorimetric analyses were made of total, total N and PO4 ammoniacal nitrogen in eighteen points of collection at dams, dams and bathed by the river properties, the results were correlated to the climate factor of semi-arid region. The results showed that the temperature of the semi-arid promotes evaporation of their reservoirs and the long period of drought causes shells exhibit low water volume, because of these factors the phosphorus content has decreased in rural areas, because there was no agricultural waste being washed (fertilizer) which is the main source of this nutrient in the area, in the urban area where the main source are the domestic sewage, There was minimal change or increase. The same can be said with respect to nitrogen content in the water of the areas examined, because the nitrogen and phosphorus exhibit similar contamination sources. On the other hand, ammonia for being an indicator of pollution source next, features high on their levels in analyzed points, as there is accumulation of the same due to water shortages.