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Article . 2017 . Peer-reviewed
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Cartografía de incendios forestales en Paraguay mediante imágenes AQUA-MODIS

Authors: Martín Isabel, María del Pilar; Rejalaga Noguera, Larissa K.;

Cartografía de incendios forestales en Paraguay mediante imágenes AQUA-MODIS

Abstract

[ES] Uno de los principales problemas ambientales que se plantean actualmente a nivel mundial es la pérdida de los recursos forestales ocasionada por el fuego. La gran extensión y dificultad de acceso a muchas de las zonas afectadas, especialmente en zonas tropicales, hace difícil la cuantificación del daño que provocan los incendios forestales. La cartografía operativa de las áreas quemadas requiere disponer de métodos fiables y rápidos que permitan obtener resultados en un margen relativamente corto de tiempo y a una escala espacial y temporal adecuada para la gestión del fenómeno. La teledetección desde satélite supone una técnica adecuada para esta finalidad ya que proporciona datos de la superficie terrestre con una cobertura espacial y temporal suficientemente detallada y ofrece información espectral apropiada para la cartografía de áreas quemadas. En este trabajo se aborda el uso de imágenes procedentes del sensor AQUA-MODIS para la cartografía de áreas afectadas por incendios forestales en Paraguay. Se propone una metodología que combina productos MODIS con distintas resoluciones espaciales (500 y 250 metros) y espectrales (7 y 2 bandas) con el propósito de mejorar la capacidad de discriminación y delimitación de las zonas afectadas por incendios forestales en un ámbito tropical. La metodología propuesta nos permitió discriminar todos los incendios ocurridos en la zona de estudio con tamaño igual o superior a 150 hectáreas. La capacidad de discriminación resultó aceptable (en torno a los 60 %) para los incendios entre 100 y 125 hectáreas, en cambio demostró ser mas limitada para los incendios inferiores a 100 hectáreas.

[EN] One of the major environmental problems facing the world today is the loss of forest resources caused by fire. The large size and difficulty of access to many affected areas, especially in tropical areas, make difficult to quantify the damage caused by forest fires. Operational mapping of burned areas requires the availability of reliable and rapid methods that can produce results in a relatively short time range and a spatial and temporal scale appropriate to the management of the phenomenon. Satellite remote sensing is a suitable technique for this purpose as it provides data on the Earth's surface with enough spatial and temporal coverage and provides detailed spectral information suitable for mapping burned areas. This paper discusses the use of images from the AQUA-MODIS sensor for mapping areas affected by forest fires in Paraguay. It propose a methodology that combines MODIS products with different spatial (500 and 250 meters) and spectral (7 and 2 bands) resolutions for the purpose of improving the capacity of discrimination and delimitation of areas affected by forest fires in a tropical area. The proposed methodology allowed us to discriminate all fires in the study area with size equal to or greater than 150 hectares. The discrimination capacity was acceptable (around 60%) for fires between 100 and 125 hectares, however proved to be more limited for fires less than 100 hectares.

Peer reviewed

Country
Spain
Keywords

Spatial resolution, Spectral indexes, resolución espacial, spectral indexes, AQUA-MODIS, Áreas quemadas, índices espectrales, Índices espectrales, Resolución espacial, Burned areas, Mapping, Paraguay, mapping, Cartografía, spatial resolution

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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
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