The classification of bodies of water aims classify and monitor the quality of the water body,
becoming a tool that shows the conditions of water resources and enables the determination of
its needs and capabilities. The research had as general objective to draw up a proposal for a
reference classification for the quality of the water bodies into class according to the uses of
water resources for the predominant, the catchment area of Ribeirão Taquaruçu, in Palmas -
Tocantins, using mathematical models as a tool for the management of these resources.
For this reason were evaluated 16 selected points in the drainage network, for analyzes of
physical-chemical parameters of the water front to the quality patterns established By
CONAMA Resolution No. 357/05. Before the important role that the basin of Ribeirão
Taquaruçu represents for the municipality, the present study showed the procedures for
drawing up a proposal for the current qualitative classification of the water bodies into class
according to the uses of water resources predominant mentioned basin. Mathematical models
were used MGB-IPH and SAD-IPH, where respectively obtained-If flows and the modeling
of the quality parameters DBO, OD, total phosphorus, series of nitrogen and thermotolerant
coliforms. This way, it was obtained the current scenario (or river that we have) of water
quality and their respective class of classification, showing that although the basin is in an
urbanized area presented favorable conditions to the classification in class 1 and 2. Then trend
scenario was tendential (or river that we have) and conservationist (or river we want) study
based on uses and occupation of the soil. Where the trend scenario tendential that without the
deployment of policies for the management of water resources in the basin sit in class 2 and 3.
While in conservationist scenario with the application of policies framed in special class and
classes 1 and 2. Thus the decision by means of mathematical modeling tools with the
objective of the classification of the water bodies courses is possible and satisfactory.
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