Page 232 - 00. Complete Version - Progress Report IPEN 2014-2016

232 Environmental Science and Technology | Progress Report

ranga reservoir, classified as Class 1. This is iments analyzed, the chemical elements Cu,
located in parts of the municipalities of Cotia, Cr, Zn showed values above the TEL and PEL.
Embu, Itapecerica da Serra, Juquitiba, São Lou- The results indicated significant environmen-
renço da Serra and São Paulo and in the Embu tal impacts from urban invasion and sewage
Guaçu’s total area. This reservoir has signifi- waste, all of which seriously affect water qual-
cant degradation in the quality of water due ity and, consequently, the sediment quality.
to domestic and industrial wastewater con-
tribution, which affects the cost of treatment Distribution of Nitrogen Species in the
and makes it difficult to access drinking wa- Guarapiranga Dam, São Paulo – SP.
ter. The study presents the results of 26 met-
als, 7 anions, limnology parameters: pH, con- Guarapiranga Dam is responsible for about 20
ductivity, temperature, dissolved oxygen, water % of the water supply of the Metropolitan Re-
clarity, obtained from samples collections be- gion of São Paulo (RMSP). This reservoir start-
tween the years 2011-2013, These are water ed to be used as public supply source to the
samples on the surface, middle and bottom city of São Paulo in 1928, however, since the
on 14 points and bottom sediment in these 60s, there has been an irregular and disordered
same points being evaluated 26 metals. The occupation around its region. As a result, the
sediment results were compared with TEL and reservoir has significantly been altered due to
PEL values, water results were compared with the multiple environmental impacts caused
the established limits by the resolution of CO- by anthropic activities. These hydrodynam-
MANA 357/2005. Limnological parameters, ic changes in the water body are involved in
conductivity, pH and dissolved oxygen were the eutrophication processes, in other words,
outside the framework of COMANA’s resolu- in the distribution of nutrients in the resource,
tion 357/05. All Ionic species responded to es- as presented by several studies. Eutrophication
tablished by CONAMA 3357/05, however it is is a natural process that ocurrs in water bodies,
noted an increase in concentrations between nevertheless, when associated with anthropic
samples collected. Nitrogen series as well as activities, it produces changes in aquatic eco-
Fe:P ratio showed important contribution of systems, increasing nutrients amount, main-
control parameters of the organic load in res- ly nitrogen and phosphorus, and through con-
ervoir. Of the 26 elements analyzed, only Al, tributions from wastewater, it may interfere
Cu, Mn concentrations was observed outside in the water quality and use. As nitrogen is
of the COMANA’s resolution 357/05. In the sed- an important nutrient and ammoniacal spe-

Figure 4 (a,b) - Nutrient and ammoniacal species distribution at Guarapiranga Dam.

Instituto de Pesquisas Energéticas e Nucleares