Estudo do efeito das cargas de nutrientes no reservatório APM-Manso: uma abordagem através da modelagem numérica tridimensional.

Abstract

The water managers are responsible for long-term management, regulation and protection of water resources. However, it is recognized that these managers should take into account the multiple uses of water resources that are made by interested parties such as farmers, water suppliers and environmental groups. Given the complexity of the hydrological system, the development and use of mathematical models are often necessary. In this context, environmental modeling is often performed to assess the impacts of ecosystem degradation due to human action. This type of application-oriented research provides an important means by which scientists can interact and influence policies at local, regional, national and international. In the Mato Grosso State during the implementation of the hydropower plant to multiple use, called APM-Manso, measures were taken to mitigate the socioeconomic impacts caused. These measures create a trend of increasing population coupled with a changing socioeconomic characteristics for the entire area surrounding the reservoir, which aggravates the problem of nutrient pollution and indicates that there is a need prominent studies of the impact that the excess nutrients causes in the ecosystem of the reservoir. Using the hydrodynamic and thermodynamic threedimensional model, ELCOM, associated with the biogeochemical model, Caedym, this work aims to create a model representative of the loads of the main nutrients that cause the cultural eutrophication, which are: ammonia (NH4), nitrate (NO3) and orthophosphate (PO4), in order to study the effects of spatial and temporal dynamics of these nutrients in the trophic state of the reservoir around the points of discharge of sewage and in its entirety.