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| ROZON,Christine; LUCOTTE,Marc; DAVIDSON,Robert; PAQUET,Serge; OESTREICHER,Jordan Sky; MERTENS,Frédéric; PASSOS,Carlos José SOUSA; ROMANA,Christine. |
| Pressures on the Brazilian Amazon forest have been accentuated by agricultural activities practiced by families encouraged to settle in this region in the 1970s by the colonization program of the government. The aims of this study were to analyze the temporal and spatial evolution of land cover and land use (LCLU) in the lower Tapajós region, in the state of Pará. We contrast 11 watersheds that are generally representative of the colonization dynamics in the region. For this purpose, Landsat satellite images from three different years, 1986, 2001, and 2009, were analyzed with Geographic Information Systems. Individual images were subject to an unsupervised classification using the Maximum Likelihood Classification algorithm available on GRASS. The classes... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Deforestation; Watershed scale; Landsat Satellite Images; Cities; Roads. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672015000200203 |
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| Gaigne, Carl; Riou, Stephane; Thisse, Jacques-Francois. |
| There is a wide consensus among international institutions and national governments in favor of compact (i.e. densely populated) cities as a way to improve the ecological performance of the transport system. Indeed, when both the intercity and intra-urban distributions of activities are given, a higher population density makes cities more environmentally friendly as the average commuting length is reduced. However, when we account for the possible relocation of activities within and between cities in response to a higher population density, the latter may cease to hold. Because changes in population density affect land rents and wages, firms and workers re-optimize and choose new locations. We show that this may reshape the urban system in a way that... |
| Tipo: Working Paper |
Palavras-chave: Greenhouse gas; Commuting costs; Transport costs; Cities; Environmental Economics and Policy; D61; F12; Q54; Q58; R12. |
| Ano: 2012 |
URL: http://purl.umn.edu/121692 |
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