Geomorphological reconstitution of technogenic relief in Presidente Prudente-SP

Author(s)

Érika Cristina Nesta Silva

• Document type: Doctoral Thesis
• Institution: Universidade Estadual Paulista (Unesp)
• Defense date: 2017-07-21
• Advisor: João Osvaldo Rodrigues Nunes

Abstract

Technogenic deposits are a result of direct and indirect actions of society. They are able to alter the surface structure characteristics of landscapes, and consequently, the landforms and characteristics of surface materials. These formations have been increasingly observed and studied, even though the usage of different nomenclature, according to the referential utilized. At this study, it is investigated the formation of technogenic reliefs in the city of Presidente Prudente-SP, they are related to the historical usage and the urban and rural occupation. The chosen housing complex areas to be studied are: Jardim Humberto Salvador and Augusto de Paula housing Complexes; part of East Section of Presidente Prudente and Vila Nova Prudente. The general objective is the analysis of the changes in the landscape through geomorphological reconstitution of technogenic relief in these areas. In order to fulfill this objective, it was accomplished fieldwork, laboratorial and desktop procedures, which included collecting samples from technogenic deposits in area of technogenic floodplain; particle size analysis and sand fractionation; mapping the alterations which occurred in the landscapes, especially the technogenic forms and features through stereoscopy of aerial photos from 1962, 1978, 1995 and use of current images of Google Earth; classification of the technogenic grounds, considering the presence of features and forms of aggradation and degradation relief origin. Through these procedures, it was possible to recognize that as times goes by, technogenic features changes abundantly, as an example is the technogenic deposition in valley floor areas, whose sediments comes from erosive processes installed in other compartments of the relief (top and slope), and afterwards, occur the rework of these depositions, through the installing of erosive processes in plain area. Regarding the manufactured materials and technogenic sediments, when studied in detail, provide the possibility to recognize technogenic aspects, such as volume of technogenic deposition and possible source area of these materials, such as old deposition area of solid domestic waste. Thus, the adopted procedures have shown to be efficient towards recognition of the diverse characteristics concerning the formation and evolution of forms and technogenic deposition. (AU)

• FAPESP's process: 13/01302-0 - Geomorphological Reconstitution of Technogenic Relief in Presidente Prudente-SP
• Grantee: Érika Cristina Nesta Silva
• Support Opportunities: Scholarships in Brazil - Doctorate