Name: Selena Lopes Carvalho
Type: PhD thesis
Publication date: 18/12/2019

Namesort descending Role
Antonio Sérgio Ferreira Mendonça Advisor *

Examining board:

Namesort descending Role
Antonio Sérgio Ferreira Mendonça Advisor *
Jorge Henrique Alves Prodanoff External Examiner *
José Antônio Tosta dos Reis Internal Examiner *
Larice Nogueira de Andrade External Examiner *
Lucia Catabriga Internal Examiner *

Summary: Regarding the planning of water resources, the water pollution and watershed water
quality aspects, this research aimed to develop a methodological proposal for
subsidizing diffused and point loads reduction planning in watersheds, in such a way
that their watercourses quality parameters are kept in accordance with limits
established by environmental legislation. The methodology is based on minimum
diffuse and point loads treatments removal efficiencies for watercourses quality
standards estimation. For runoff and diffuse loads quantification it was used the
Event mean concentration and United States Soil Conservation Service methods. A
model different diffuse and point pollution sources inflows. The Biased Random-Key
Genetic Algorithm (BRKGA) was utilized for the identification and selection of the
lowest pollutant removal efficiencies values that could allow quality standards
attendance. There was developed a Decision Support System incorporating the
models and methods. The Decision Support System was applied to two watersheds,
for which there were considered various scenarios. The results indicated significant
differences amongst estimated diffused load productions in the scenarios proposed,
pointing out the need for investigation about the contribution of diffused loads
according to body water qualities. Demonstrating that concentrations of pollutants
present in pollution can overlap the dilution effects of related incremental flows. It has
been found that the first rain after drought can result in a critical pollution scenario.
Towards different simulations performed, it was possible to estimate minimal
efficiency of removal of point loads and diffused ones that would take the attendance
of class quality into account and stablished to modeled body water, as well as
considering different production scenarios of such loads. Which demonstrates that
the algorithm of research implemented correponds appropriately to the issue
necessities. The Support System of Decision, SIMPPOD, was able to effectively
apply the method proposed, and consequently, attend the proposal of its idealization.

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