Banca de DEFESA: JUCINEI DA SILVA ARRUDA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : JUCINEI DA SILVA ARRUDA
DATA : 04/09/2024
HORA: 13:00
LOCAL: meet.google.com/pjm-ndhy-xxs
TÍTULO:
PALAVRAS-CHAVES:

Environmental Legislation; River-Fluvial Plain System; Wetlands; Delimitation – APPs; Pantanal Mato-grossense.

PÁGINAS: 127
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Geociências
SUBÁREA: Geografia Física
ESPECIALIDADE: Geocartografia
RESUMO:

Permanent Preservation Areas are fundamental in order to maintain water resources, geological/soil stability and biodiversity. Thus, the objective was to analyze the suitability and applicability of the Brazilian Forest Code, in the lower course of the Sepotuba River – Mato Grosso, taking into account the uses and occupation of land, its hydrological behavior and seasonal hydrodynamics in the river-fluvial plain system. For this, bibliographical research was carried out; analysis of spatio-temporal mappings of land use and occupation: low course, permanent preservation area delimited by Law No. 4,771/65 and in the river-fluvial plain system; also application of the Modified Normalized Difference Water Index (MDWI). In 1967, most of the lower course was covered by native vegetation (97.5%), comprising 2.5% of river environments. However, from 1985 to 2015, vegetation cover was removed (-35.95%). Simultaneously, land use and occupation increased from 28.88% to 53.85%, an increase of 86.40% in 30 years. In relation to river environments, its occurrence decreased from 1967 to 1985 (2.29%), with a reduction of -11.35% until 2015 (2.03%). In this context, the river-fluvial plain system with 218 km², are morphological units that correspond to 11.41% of the total area of the lower course and 2.21% of the hydrographic basin. So, in 1967, 81.65% was covered by native vegetation, while 18.35% corresponded to river environments. In turn, in 2022, vegetation cover was reduced to 53.20%, replacing land use and occupation with 34.42% and river environments totaling 12.38%. The role of changes in Brazilian environmental legislation stands out, especially the Brazilian Forest Code, as from Law 12,727/2012 onwards, the regular bed is considered to be the river bed for the delimitation of the Permanent Preservation Area and no longer the largest bed. (river plain) in accordance with Law 4,771/1965. Therefore, among the main consequences in relation to the appropriation process, the suppression of vegetation covers with direct impacts on river environments stands out, with a view to reducing humid areas. It should be noted that during the 1988 flood period, the river-fluvial plain system was flooded with an area of 53.63 km². However, in 2020 the area was reduced to 11.75 km² (-78.09%). In any case, the delimitation of the Permanent Preservation Area - APP, taking the regular bed as a criterion, cannot encompass the dynamics existing in river systems with alluvial stretches, as is the case of the lower course of the Sepotuba river, where they are found beyond of the main river channel, the floodplain (larger bed) with morphological features such as secondary channels, bays, lagoons, abandoned meanders, among others. River environments that, eventually, can be reoccupied by the flow of water during periods of flood and assume the condition of a main channel. Therefore, there is a need to resume discussions about the complexity of river systems, and the role of environmental legislation, considering that flood cycles denote the interactions of hydroclimatic and appropriation conditions, as well as river connectivity with its basin hydrographic.

MEMBROS DA BANCA:
Presidente - 393.900.588-64 - GUSTAVO ROBERTO DOS SANTOS LEANDRO - FUFGD
Interna - 83161101 - CELIA ALVES DE SOUZA
Externo à Instituição - PAULO CESAR ROCHA -