Banca de QUALIFICAÇÃO: TAMIRES CUNHA DE AGUIAR

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : TAMIRES CUNHA DE AGUIAR
DATE: 30/06/2023
TIME: 14:00
LOCAL: Porto Velho
TITLE:

Não possui

KEY WORDS:

Erodibility, Rural roads, Soil erosion

PAGES: 119
BIG AREA: Ciências Exatas e da Terra
AREA: Geociências
SUBÁREA: Geografia Física
SPECIALTY: Hidrogeografia
SUMMARY:

This study aims to analyze the effect of the different homogeneous units of soil-relief-geology interaction of Morphopedological Units (UMF) on the production of runoff and sediment on unpaved roads in the upper Rio das Garças basin using the portable rainfall simulation model by sprinkling (SCPA), which basically aims to simulate rainfall that occurs in intense events in the area as a way to control one of the variables that act in the erosive process of roads, in open hydroerosive plots to establish patterns of surface runoff production and quantification of sediments. The present study focuses on the southern part of the Rio das Garças basin, which stands out due to the current occupation process, in which a potential for opening new roads in currently exploited areas was observed. It is an area that puts pressure on the limits of the Bom Futuro National Forest, established by decree No. 96,188 of 06/21/1988, and disaffected in 2010, and the Karipunas Indigenous Land. This region becomes the scene of intense exploitation of its natural resources, therefore, it suggests a focus on its current stage of
exploitation. The morphopedological units (FMU) were defined following the methodological script proposed by Castro and Salomão (2000). The delimited compartments establish recognizable and demarcated relief physiognomies where specific pedological and lithological structures are established based on the Planafloro database (RONDONIA, 2001). The physical characterization of the basin showed predominance in more than >80% of the area constituted by dystrophic Cambisol and dystrophic Red Yellow Latosol soils. A mapping of the basic structure of the roads was carried out with the aim of selecting ideal locations for carrying out the simulated rain, which keep physical conditions of the soil profiles and which imprint the identity of the morphopedological units and finally the survey of the type of use and predominant coverage in the area, where uses such as: temporary crops such as rice planting, soybean planting and pasture were identified. BHARG was divided into sectors considering the following basic criteria: 1. Type of use and land cover; 2. Mapped morphopedological units; 3. Function and hierarchy of the roads, which resulted in six sectors. Experiments have already been carried out that preliminarily account for some main conclusions: the rates of total sediment released by the analyzed stretch were not explained by the runoff coefficient; there is a tendency for the moisture percentage to be well correlated with the runoff response time in the plots; it may be that the slope presented in the plots explains the runoff coefficients and sediment loss rates; better organize the general information that support the discussion of the data than the delimitation of the FMUs only. The next steps are necessarily carrying out field activities to carry out the SPCA experiments in the repetition of the sections that are scheduled for may, which is a month of seasonal transition that is established in the region. After the
execution of the rainfall simulation experiment, the data will be worked on software for the analysis of descriptive statistics, seeking answers that support the hypothesis of the thesis. In the data analysis, some techniques of statistical comparison between averages will be adopted, in addition to correlation between the analyzed properties.

COMMITTEE MEMBERS:
Externo à Instituição - VALDEMIR ANTONELI
Interno - 1810294 - ADNILSON DE ALMEIDA SILVA
Externo à Instituição - ANDERSON VOLPATO SCCOTI
Interno - 396929 - DORISVALDER DIAS NUNES
Externo à Instituição - EDIVALDO LOPES THOMAZ
Interno - 3102827 - JOAO PAULO ASSIS GOBO
Interno - 2313615 - MICHEL WATANABE
Interno - 2374782 - RICARDO GILSON DA COSTA SILVA
Interna - 2322602 - SIANE CRISTHINA PEDROSO GUIMARAES SILVA