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3 Polish Journal of Environmental Studies

3 2017

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Spectral property observations in lakes surrounding a chilean volcano

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De los Ríos Escalante P. , Castro M. , Esse C. , Acevedo P.

Polish Journal of Environmental Studies

2017

tom 26

nr 2

Northern Chilean Patagonia has numerous pristine lakes associated with Nothofagus and Araucaria araucana forests. The present study consists of a study of optical properties in visible, close, and medium infrared wavelengths in mountain lakes surrounding Llaima Volcano – lakes that have associated Nothofagus and Araucaria araucana native forests with volcanic origins. The results revealed high reflectance values in Arcoiris Lagoon that has volcanic stones in its bottom, whereas the other lakes and lagoons have low reflectance values. These differences in spite of oligotrophy would be associated with surrounding vegetation and geological characteristics of studied sites.

Spectral properties observations in lakes of a Chilean National Park

100%

De los Ríos Escalante P. , Castro M. , Acevedo P. , Esse C.

Polish Journal of Environmental Studies

2017

tom 26

nr 1

Northern Chilean Patagonia has numerous pristine lakes associated with perennial native forests. The present study looks at optical properties in visible, close, and medium infrared wavelengths in mountain lakes of Alerce Andino National Park (41°S). These lakes have associated Nothofagus and Fitzroya cupressoides native forests of glacial origins. The results revealed high reflectance values for B1 and B3 for Chaiquenes, Triangulo, and Sargazo lakes located within Nothofagus and F. cupressoides native forest; Precipicio Lagoon has high B3, B4, B5, B6, and B7 reflectance values, perhaps due to granite surroundings; and the remaining 18 lagoons have relative low reflectance values for all bands, probably due to the predominance of Cupressaceae forest and mountains that make access difficult. These differences are associated with surrounding vegetation and geological characteristics of the studied sites.

Satellite spectral property observations in Chilean lakes

100%

De los Ríos Escalante P. , Castro M. , Esse C. , Acevedo P.

Polish Journal of Environmental Studies

2017

tom 26

nr 3

Northern Chilean Patagonia has numerous pristine lakes associated with Nothofagus and Araucaria araucana forests. The present study looks at optical properties in visible, close, and medium infrared wavelengths in mountain lakes located in Huerquehue National Park. These lakes have associated Nothofagus and Araucaria araucana native forests with glacial origin. The satellite results revealed high reflectance values in Los Patos Lagoon to B5, B6, and B7 Landsat-8 satellite bands. This lagoon is the most ephemeral pool located within A. araucana forest, whereas Tinquilco Lake has B5, B6, and B7 low reflectance values, which would be due to the presence of Nothofagus forest and probable human intervention in its surrounding basin. Whereas Angelica, Del Sacrificio, Chico, Los Condores, Las Mercedes, Olvidada, Toro, and San Manuel lagoons have low B3, B4, B5, B6, and B7 reflectance values, which would be because of the presence of native forest in their surrounding basin, and that all of these ecosystems are permanent. These differences, in spite of the oligotrophy, would be associated with surrounding vegetation and geological characteristics of studied sites.