Name: JAMES RAFAEL ULISSES DOS SANTOS
Type: MSc dissertation
Publication date: 11/07/2016
Advisor:
Name |
Role |
|---|---|
| EBERVAL MARCHIORO | Advisor * |
Examining board:
| Name |
Role |
|---|---|
| ANDRE LUIZ NASCENTES COELHO | Internal Examiner * |
| EBERVAL MARCHIORO | Advisor * |
| GILBERTO FONSECA BARROSO | External Examiner * |
Summary: work research, aims determine the Erosive vulnerability (VE), through an integrated analysis of the landscape, in the river basin Duas Bocas, located between the counties of Cariacica and Santa Leopoldina in Espirito Santo State, Brazil. The integrated analysis takes the natural and anthropic attributes that make up the landscape, being them: slope, soils, land use and cover and rainfall. As objectives were checked the transformations in land use and land cover for the years 1970, 2008 and 2012, which in combination with the natural and antropic attributes contributed to the characterization of the erosive vulnerability in 1970, 2008, 2012 and 2013. Methodological resources were make a bibliographical research on dissertations, theses and scientific journals about the subject, and also take a cartographic data in official institution of the State, such as: aerial photographs of 1970, aerial images of 2008 and 2012, vector and matrix data. The method adopted for modeling of erosive vulnerability was the environmental fragility proposed by Ross (1994) and Amaral and Ross (2009), based on the concept of ecodinâmica of Tricart (1977). In the results was founded that use and cover of the land had gradual growth on the native forest between 1970 to 2012, because the forest through regeneration in areas previously occupied by Macega, At the same time was protagonist of major losses of land-use, in relation to the lost grazing area in-site of REBIO, but showed an increase in portion comprising the river Plains, downstream of basin. Agricultural crops classes, specifically of Banana, there were no big changes, staying even with bigger concentration in the central part of the area. Another important class, but that did not provide a significant evolution, was the building, since the process of expansion was virtually outside the perimeter of the basin. With regard to the year of 1970 VE featured a predominance of low and very low classes, and medium and high in central and potions amount. The year 2008 also resembled 1970 because the classes to see very low and low occurred downstream, WHERE the average and high also in the central portions and amount. For the lower and middle classes 2012 in downstream of basin, and with medium and high in the central portion, and the amount the middle classes, and therefore the year with the lowest percentage of high vulnerability. In this way, 2013 was the year that presented the largest discrepancies in VE, with prevalence for the entire basin of the middle and upper classes, except for downstream, in the part which includes the river plain, which presented low class. However, what determined which areas had more or less erosive vulnerability were the variables slope, soils the Uct and precipitation each year, except for 1970, which used normal climatological rainfall data.
