Banca de DEFESA: MATHEUS GUILHERME RAMIN

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : MATHEUS GUILHERME RAMIN
DATA : 20/11/2020
HORA: 14:30
LOCAL: Via Google Meet
TÍTULO:

 

CUIABÁ RIVER WATER QUALITY MODELING TO EVALUATE THE CONTROL OF DIFFUSED POLLUTING

PALAVRAS-CHAVES:

diffuse pollution; modeling; water quality control; HEC-RAS

PÁGINAS: 78
GRANDE ÁREA: Outra
ÁREA: Ciências Ambientais
RESUMO:

The Upper Rio Cuiabá Watershed, bounded by the Planning and Management Unit P4 (UPG-P4) and located on the plateau of the Hydrographic Region of the Paraguay River (HR-Paraguay), presents itself as a point of high interest for water quality control, since it encompasses the most populous and densest region of HR-Paraguay (with about one million inhabitants), it has a growing expansion of the agricultural and livestock sectors and is located upstream of one of the largest extensions of wetlands in the world: the Pantanal. Among the main causes of the water quality problems observed in HR-Paraguay are the transport of sediments and diffuse rural polluting loads from the plateau region to the Pantanal. Thus, this work aimed to evaluate the impact of the implementation of alternatives to control phosphorus present in the diffuse loads of the UPG-P4 on the water quality of the Cuiabá River. Using the HEC-RAS software to perform a one-dimensional stationary modeling, four water quality scenarios were simulated: (i) Base Scenario: flows during flood periods without diffuse load reduction; (ii) Scenario 1: flows during flood periods with an 80% reduction in phosphorus concentrations in pasture and agricultural areas; (iii) Scenario 2: flows during flood periods with an 80% reduction in phosphorus concentrations only in pasture areas; (iv) Scenario 3: flows during flood periods with an 80% reduction in phosphorus concentrations only in agricultural areas. The results showed that the phosphorus limits established by CONAMA Resolution nº 357/2005 were reached only in Scenario 1, and only in the stretch between the Manso River and the beginning of the urban area of Cuiabá. It was observed that, in the study area, the impact of pasture areas is more significant than agricultural areas. However, the configured model proves to be useful as a tool for making decisions related to the planning of water quality control, and can be used for the evaluation of various combinations of solutions and scenarios at UPG-P4 and with the potential to be replicated in other regions of HR-Paraguay, as long as the necessary adaptations are made. With it, it is possible to study alternatives that can reach the limits established by the legislation. However, it is important to carry out a critical assessment of the real impacts and improvements that meeting the maximum concentrations required by the CONAMA resolution would bring to the dynamics of the Pantanal. To this end, complementary studies would be needed to assist decision making within the scope of the Paraguay River Hydrographic Region.

MEMBROS DA BANCA:
Presidente - 80963002 - RODRIGO BRUNO ZANIN
Interno - 123201003 - FRANCISCO LLEDO DOS SANTOS
Externo ao Programa - 80970002 - DIONEI JOSE DA SILVA
Externo à Instituição - TELDO ANDERSON DA SILVA PEREIRA - UFMT