Banca de QUALIFICAÇÃO: ANDRESSA PADOVANI GIL

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : ANDRESSA PADOVANI GIL
DATA : 02/08/2021
HORA: 14:00
LOCAL: Videoconferência
TÍTULO:

CONTRIBUIÇÃO DA BACIA HIDROGRÁFICA DO RIO CUIABÁ PARA AS INUNDAÇÕES DO PANTANAL 

PALAVRAS-CHAVES:

 Cuiabá river; Alto Paraguai Basin; Pantanal; floods; SIGs.

PÁGINAS: 151
GRANDE ÁREA: Ciências Humanas
ÁREA: Geografia
SUBÁREA: Geografia Regional
ESPECIALIDADE: Regionalização
RESUMO:

The Cuiabá river has its springs located in the upper part of the Alto Paraguai Basin, running in a southwesterly direction until it flows into the Paraguai river, the main collecting trunk of the Pantanal waters. It has great importance for the formation of the Pantanal, developing the second largest megafan in the plain. The Pantanal, one of the largest wetlands in the world, has a water dynamic marked by drought and flood events, and the effective role of rivers in local flooding is unknown in the literature. Thus, this research sought to analyze the contribution of the Cuiabá river basin to the Pantanal floods, through the understanding of the environmental conditions of the basin for the entry of water into the Pantanal and the mapping of the floods in the Cuiabá’s Pantanal, identifying the areas of river-plain connection. The mapping of the floods was done using remote sensing techniques in a GIS environment (geographical information systems), with the application of the Modified Normalized Water Difference Index, processed in Landsat satellite images, using the historical series of images in the river flood period from 1985 to 2018. To analyze the floods, the stretch covered by the Cuiabá river in the Pantanal was divided into three compartments: upstream, medium and downstream. The research results identified that the Cuiabá river basin has an important contribution to the flooding of the Pantanal, considering that it registers higher rainfall than the Pantanal plain and its morphometric, lithological and pedological characteristics favor greater surface runoff, contributing to the flow of the Cuiabá river. The Pantanal, on the other hand, has altimetric and pedological characteristics that favor surface runoff, with soaked soils and low, flat relief that allow the permanence of vast flooded areas for a long period of time. The Cuiabá river overflows and floods large areas of the Pantanal during flood periods, and the presence of several abandoned paleochannels throughout its geomorphological evolution is important, as they are reactivated in these periods and establish paths for the flow of water. The contribution of the Cuiabá river occurs in a different way in each analysis compartment: in the first, when entering the Pantanal, there are the greatest losses of water to the plain, where the river assumes a distributary pattern (multichannel) and floods an area of approximately 785.25 km². In the second compartment, in the middle section, the river has the smallest contribution, flowing again in a single meandering channel and flooding an area of 199.25 km². In the third compartment, downstream, the river has some breaking points on the bank and connects with some lakes in the plain, flooding an area of approximately 495.71 km²; totaling 1389.48 km² of flooded area along the entire stretch of the plain. It is concluded that the Cuiabá river plays a significant role in the flooding of the Pantanal, considering that its overflow waters are mixed with the areas flooded by other rivers in the plain, especially the Paraguay river.

MEMBROS DA BANCA:
Presidente - 83161001 - CELIA ALVES DE SOUZA
Interno - 393.900.588-64 - GUSTAVO ROBERTO DOS SANTOS LEANDRO - null
Interno - 114163019 - LEILA NALIS PAIVA DA SILVA
Externo à Instituição - PATRICIA HELENA MIRANDOLA AVELINO - UFMS