Banca de DEFESA: PRISCILLA BARBOSA DE ARAÚJO MOREIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : PRISCILLA BARBOSA DE ARAÚJO MOREIRA
DATE: 14/10/2022
TIME: 14:00
LOCAL: PLATAFORMA VIRTUAL GOOGLE MEET
TITLE:

Degradation of aquatic environments: Impacts of erosion on quality of water in a Conservation Unit

KEY WORDS:

Soil quality, erosion, water quality.

PAGES: 101
BIG AREA: Outra
AREA: Ciências Ambientais
SUMMARY:

The occurrences of erosive processes, due to the misuse and occupation of the soil, are considered one of the most worrying environmental problems currently faced. In Conservation Units, the occurrence of these processes entails risks to the quantitative and qualitative stability of an entire system, especially water and soil. In this context, the drainage area of Lagoa dos Macacos, located in an Integral Protection Conservation Unit, the Municipal Natural Park of Timbaúbas, in Juazeiro do Norte - CE, has presented several erosive processes. Associated with this fact, the aforementioned Park receives daily releases of gray water from rainwater galleries. That said, this research aims to evaluate the influence of gray water release on the erosive process at the edge of Lagoa dos Macacos and, consequently, on the water quality of this lagoon. To evaluate the water quality, the parameters pH, electrical conductivity, dissolved oxygen, chemical oxygen demand, biochemical oxygen demand, total solids, suspended solids, dissolved solids and sedimentable solids were determined. The soil, in turn, was evaluated through the analysis of pH, electrical conductivity, total organic carbon, labile carbon and soluble carbon. Soil erodibility was determined through granulometry, liquidity limit, plasticity limit, real grain density, rapid dispersion, disaggregation test and aggregate stability. Statistical analysis of the physical-chemical data of water and soil was performed using descriptive statistics and the Kruskal Wallis test, using the Excel 2019 and BioEstat 5.3 programs, in that order. The R Studio software was used for the elaboration of box plot graphs. From the results obtained, it was verified that, despite the gray waters having altered the content of organic matter in the pond's edge area, the mechanical characteristics of the soil, evaluated in this research, were not altered. However, due to the also direct supply of gray water to the lagoon, associated with the transport of soil particles eroded during surface runoff, it was found that the water quality conditions of the researched lagoon do not meet the requirements established by Resolution No. 357 of CONAMA, for Class 1 water bodies. In view of these results, it is inferred that it is necessary for the managing body of this Conservation Unit to prepare its Management Plan and enforce, among others, the actions aimed at meeting the mandatory objective of this unit, which is to preserve natural ecosystems and their ecologically relevant physical and biological elements, for the guarantee and maintenance of ecosystem services, among which, the contribution to water supply and soil regulation stand out .

BANKING MEMBERS:
Interna - 1239724 - ANA CELIA MAIA MEIRELES
Externa ao Programa - 1657653 - ANA PATRICIA NUNES BANDEIRA
Interna - 1337574 - MARIA GORETHE DE SOUSA LIMA BRITO