Imagens CBERS para o estudo de manguezais do Brasil aplicações, potencialidades e limitações

Brazil shows the third largest world mangrove area, but the increase of anthropogenic pressures has\ud been leading to high loss of these forests. This highlights the need for synoptic, multiscale and multitemporal\ud studies of Brazilian mangroves by the use of remote sensing tools. For this purpose, the CBERS (China-Brazil\ud Earth Resources Satellite) images are valuable tools. In this paper we presented and discussed features,\ud applications, potentialities and limitations of the CBERS-2 and 2B images from sensors IRMSS, CCD and HRC\ud for the study of Brazilian mangroves. For a case study, images of these three sensors of the coastal zone of\ud Sergipe State (Northeast Brazil) were processed in GIS. The use of CBERS images allows the identification\ud (IRMSS), mapping, area quantification, change detection, identification of types of mangroves stands, analysis\ud of canopy closure and biomass estimate (CCD) and extraction of detailed information about mangrove coverage\ud (HRC). The selection of the most appropriate sensor for a particular mangrove study should mainly occur by the\ud scale of analysis. The joint use of the three sensors is suitable for micro-region studies, since this approach offers\ud a range of supplementary information, which is not possible to obtain using images of a single sensor.Fapesp (Fundação de Amparo à Pesquisa do Estado de São Paulo, processo 2010/20028-

Imagens CBERS para o estudo de manguezais do Brasil aplicações, potencialidades e limitações

Abstract. Brazil shows the third largest world mangrove area, but the increase of anthropogenic pressures has\ud been leading to high loss of these forests. This highlights the need for synoptic, multiscale and multitemporal\ud studies of Brazilian mangroves by the use of remote sensing tools. For this purpose, the CBERS (China-Brazil\ud Earth Resources Satellite) images are valuable tools. In this paper we presented and discussed features,\ud applications, potentialities and limitations of the CBERS-2 and 2B images from sensors IRMSS, CCD and HRC\ud for the study of Brazilian mangroves. For a case study, images of these three sensors of the coastal zone of\ud Sergipe State (Northeast Brazil) were processed in GIS. The use of CBERS images allows the identification\ud (IRMSS), mapping, area quantification, change detection, identification of types of mangroves stands, analysis\ud of canopy closure and biomass estimate (CCD) and extraction of detailed information about mangrove coverage\ud (HRC). The selection of the most appropriate sensor for a particular mangrove study should mainly occur by the\ud scale of analysis. The joint use of the three sensors is suitable for micro-region studies, since this approach offers\ud a range of supplementary information, which is not possible to obtain using images of a single sensor.Fundação de Amparo à Pesquisa do Estado de São Paulo, processo 2010/20028-

Avaliação do estado de conservação da vegetação nas encostas da Serra do Mar - Município de Cubatão, utilizando sensoriamento remoto e SIG

O município de Cubatão, no estado de São Paulo, sedia atividade industrial de importância nacional, principalmente nas áreas siderúrgica, petroquímica e química. No entanto, sua localização na planície litorânea junto à base da Serra do Mar não favorece a dispersão dos poluentes atmosféricos lançados diariamente pelas indústrias. Essa condição tem gerado sérios problemas de degradação da vegetação que cobre a área serrana, tendo sido detectados, em meados da década de 80, inúmeros escorregamentos do solo que cobre as encostas. Nessa época, o governo do estado, através da CETESB, iniciou programa de controle da poluição industrial no município, incluindo o replantio de espécies nativas da Mata Atlântica que cobre as encostas. O presente estudo pretende verificar o estado de conservação dessa vegetação após seu replantio, utilizando sensoriamento remoto e sistema de informação geográfica ou SIGThe city of Cubatão, in the state of São Paulo, comprises significant industrial activities, mainly metallurgy of iron and steel, chemical and petrochemical. It is located in the littoral plain, at the bottom of the "Serra do Mar" mountain range, unabfing the dispersion of the pollutants released daily in the atmosphere by all the industries. The amount of pollution was such in the early 80s that it caused severe damage to the vegetation, specially those located on the mountain slope. As a result, hund reds of soil sliding occurred, strongly affecting the lan dscape. At that time, the state government, through Cetesb, began a program to control industrial pollution in the municipality, which included sowing , "Mata Atlântica" native species over the degraded areas. The purpose of the present study is to verify the vegetation state of conservation after the sow ing program , using remote sensing and GIS techniques

Riqueza e abundância de Culicidae (Diptera) em área impactada, Mato Grosso do Sul, Brasil

The damming of Paraná River for the construction of Porto Primavera Hydroelectric Power Plant, between the states of Mato Grosso do Sul, Midwestern Brazil and São Paulo, Southeastern Brazil, has changed the ecological relationships in the area. The objective of the study was to describe the fauna that can be potential vectors in this reservoir, 2 km away from its right bank, in Bataguassu, Mato Grosso do Sul, before flooding. Mosquitoes were monthly captured in different environments from July 1997 to November 1999. During this period 16,553 adult specimens and 1,795 immature forms were collected with richness of 86 different species of adults and 44 different species of immature forms. The fauna presented a richness that included species of epidemiological importance, as Anopheles darlingi and other mosquitoes with potential for arbovirus transmission.O represamento do Rio Pananá para construção da hidrelétrica de Porto Primavera, entre os Estados do Mato Grosso do Sul e São Paulo, alterou as relações ecológicas na região. O objetivo do estudo foi descrever a fauna de culicídeos potencialmente vetores nesse reservatório, a 2km da margem direita, em Bataguassu, Mato Grosso do Sul, na fase anterior à inundação. Os culicídeos foram capturados em ambientes distintos mensalmente, de julho de 1997 a novembro de 1999. Foram calculados índices de riqueza e abundância. Obtiveram-se 16.553 exemplares adultos e 1.795 imaturos, com riqueza de 86 e 44 espécies, respectivamente. A fauna culicídea da área de estudo apresentava relativa riqueza, com espécies de valor epidemiológico, como o Anopheles darlingi, além de outras com potencial na veiculação de arbovírus

Dificuldades no uso de dados espectrais orbitais para inferir ou estimar concentração de clorofila em ecossitemas lênticos tropicais

There are many details about limnological parameters which may jeopardise the use of satellite images to estimate them. Two or the major factors affecting surface water quality, suspended sediments and chlorophylls, produce visible changes in reflected solar radiation. However, depending on the concentration, the mineral suspended sediments in the euphotic zone can mask completely the spectral response due to the chlorophyll. Another problem is the degradation products of the chlorophylls, the phaeophytins, which are structurally so similar to chlorophyll that absorb red light at the same wavelengths. Since both pigments occur in fresh watre in variable amounts and from two different origens (autochthonous and allochthonous), it is impossible to determine the spectral influence of each pigment in the radiance registered by satellite. The intention of this paper is to meet some of these aspects in order to help decision-makers wheather they should use or not satellite images to estimate limnological parameters like algal biomass and trophic state.Pages: 109-11

Estudo preliminar para a estimativa de níveis de eutrofização utilizando dados espectrais obtidos pelo sistema TM-Landsat: Reservatório de Paraibuna

Pages: 86-8

Utilização de índices vegetativos obtidos com dados do sistema TM-LANDSAT no estudo da qualidade ambiental urbana: cidade de São Paulo

Este documento foi aprovado e publicado pelo INPE como uma publicação individual (independente da versão que consta nos Anais Digitalizados)