Name: JULIANA MENDES FRECHIANI
Type: MSc dissertation
Publication date: 30/08/2021
Advisor:
Name |
Role |
|---|---|
| EBERVAL MARCHIORO | Advisor * |
Examining board:
| Name |
Role |
|---|---|
| ANDRE LUIZ NASCENTES COELHO | Internal Examiner * |
| EBERVAL MARCHIORO | Advisor * |
Summary: This research aimed to investigate and compare the morphological changes in the
landscape resulting from anthropic interference. The district of Itaoca, city of
Cachoeiro de Itapemirim, in the state of Espírito Santo/Brazil was chosen because its
morphology is impacted by the extraction and processing of stone (quarrying) to
meet the demands of the international market. The research is based on the
application of retrospective geomorphological mapping for the proof of landscape
transformations, such as changes in hydrography and the shaping of anthropogenic
lagoons for the period 1970s to 2012/15. For this analysis, the changes in land use
and land cover in the years 1970, 2007/08, 2012/15 and 2019 were considered,
pointing out the relations of economic activities, mainly exploration and processing of
stones, cause changes in morphology. The changes in the hydrography were
described by morphometric parameters in order to correlate the implications of
human actions on the natural processes, to prove and also to dimension the changes
on the physical environment. In the first moment, a bibliographic and cartographic
survey was carried out. Subsequently, photointerpretation analyses were conducted
and geomorphological mapping based on the proposals of Tricart (1965), Verstappen
and Zuidam (1975), Simon (2007), Valeriano (2008) adaptations of Dikau (1990),
Florenzano (2008) adaptations of Dent and Young (1981) Paschoal, Conceição and
Cunha (2010), Valeriano and Albuquerque (2010) and Paschoal (2011, 2014). As a
result, observed there was an expansion of the mining class between 1970s and
2012/15 in the northeastern side. This directly impacted the relief and promoted the
development of anthropogenic morphology, such as the expansion of anthropogenic
lagoons. In terms of main river length, total stream length and drainage density, the
stream channels have been reduced. In addition, the decrease in the hierarchical
orders of streams was observed from 1970 to 2012/15 over a fifty-year interval. The
geomorphological mapping on the scale 1:10.000 showed that the human actions on
the morphology was decisive for the shaping new flow patterns, directly influencing
the depositions in the accumulation alluvial plain area. The excavations resulted in
the disfiguring of rounded interfluves and created rectilinear surfaces, causing the
predominance of concave and rectilinear planar slope forms. In this way, it was
possible to verify the human being as a geomorphological agent, and the
geomorphological cartography as an important instrument in the supply of
information, subsidizing the planning of human actions that are developed on the
physical environment.
