O Tecnógeno na cidade de Presidente Prudente-SP / The Technogene in the city of Presidente Prudente, São Paulo, Brazil

One way to observe the human changes on the Earth surface is by studying the technogenic deposits. Concerning Presidente Prudente - SP, two technogenic formations in altered floodplains, surrounding the urban perimeter, in the following settlements were studied: Parque Residencial Francisco Belo Galindo and Vila Nova Prudente. Beside the fieldworks to recognition of the social environmental aspects, samples of technogenic deposits were collected using six-inch-PVC tubes, with one meter in length. Through the fieldworks and physical analyses (textural) performed in laboratory, it was identified the presence of urbic artifact (holdover of concrete, plastics, etc.) and sedimentary materials in Parque Residencial Francisco Belo Galindo, whose predominant textural class is “sandy loam”. In Vila Nova Prudente, whose predominant textural class is “sandy”, urbic artifacts (holdover of concrete, plastics, etc.) sedimentary materials were also identified. With the data obtained in the field survey and laboratorial analyses, it was possible to understand the direct and indirect presence of factors in the formation of technogenic deposits.