Journal: | Revista brasileira de geofisica |
Database: | PERIÓDICA |
System number: | 000340005 |
ISSN: | 0102-261X |
Authors: | Santos, Valdenira Ferreira dos1 Polidori, Laurent2 Silveira, Odete Fatima Machado da3 Figueiredo-Junior, Alberto Garcia de4 |
Institutions: | 1Instituto de Pesquisas Cientificas e Tecnologicas do Estado do Amapa, Macapa, Amapa. Brasil 2Ecole Superieure des Geometres et Topographes, Le Mans. Francia 3Universidade Federal do Para, Centro de Geociencias, Belem, Para. Brasil 4Universidade Federal Fluminense, Laboratorio de Geologia e Geofisica Marinha, Niteroi, Rio de Janeiro. Brasil |
Year: | 2009 |
Volumen: | 27 |
Pages: | 39-55 |
Country: | Brasil |
Language: | Portugués |
Document type: | Artículo |
Approach: | Analítico, descriptivo |
English abstract | Environmental studies require information on land use and land cover. This paper presents the applicability of multi-sensor satellite data (optical and radar) for land use and land cover on the Amapa coastal plain for mapping and recognition of natural and anthropogenic dynamics. This area is influenced by the Amazon River, by tides (tidal bore) and by the Intertropical Convergence Zone (ITCZ). Anthropogenic processes are associated with water buffalo ranching. The environmental information was acquired from previous data and field observation and was correlated with remote sensing data (JERS-1, RADARSAT-1, image from ETM+ sensor from Landsat 7 and DEM SRTM), digitally processed for multi-sensor, multi-scale and multi-date approach. Eight patterns of land use and land cover were identified (mangrove, “varzea” forest, arbustive vegetation area, freshwater marsh, anthropic field, intertidal plain, estuarine channel and lakes) as well with indication of natural and anthropogenic geomorphic features. The results from the evaluation of remote sensing data and the techniques applied demonstrated the potential of the remote sensing tool for studying environments in highly dynamic tropical coastal areas of difficult access. However, these tools may present some limitations once applied to application to the Amazon coast, which is a region under strong dynamic natural and anthropogenic processes |
Portuguese abstract | Os estudos ambientais necessitam de informacoes sobre a cobertura e o uso da terra. Este trabalho apresenta a aplicacao de dados de sensores remotos orbitais (oticos e de radares) na validacao de padroes de uso e cobertura do solo na plaıcie costeira amapaense para fins de mapeamento e reconhecimento da dinamica natural e antropica. Esta costa e submetida a uma dinamica intensa devido a magnitude dos processos costeiros (mares-pororoca), sua localizacao geografica, influenciada pelo rio Amazonas e pela Zona de Convergˆencia Intertropical, e processos antropicos associados a bubalinocultura. A analise foi realizada aplicando-se dados de satelite (JERS-1, RADARSAT-1, Landsat 7 e DEM do SRTM) digitalmente processados em abordagem multisensor, multiescala e multitemporal, correlacionada com dados preteritos e informacoes de campo. A analise dos produtos gerados e dados colaterais permitiu distinguir oito padroes de uso e cobertura do solo: florestas de mangue, florestas de varzeas, campos arbustivos, areas de vegetacao campestre, campo antropico, zona de intermare, canal estuarino e lagos, al´em de feicoes morfologicas lineares associadas a estes padroes. Estas informacoes sao importantes para o mapeamento dos ambientes costeiros e fundamentais para o reconhecimento da dinamica na regiao |
Disciplines: | Geociencias, Biología, Geografía |
Keyword: | Geofísica, Ecología, Geografía física, Percepción remota, Impacto ambiental, Erosión antrópica, Costas, Amapá, Brasil |
Keyword: | Earth sciences, Biology, Geography, Geophysics, Ecology, Physical geography, Remote sensing, Environmental impact, Anthropic erosion, Coasts, Amapa, Brazil |
Full text: | Texto completo (Ver PDF) |