Avaliação da Importância Ambiental da Wetland do Riacho Fundo para o Lago Paranoá e Comunidades Vizinhas (Evaluation of the environmental importance of Riacho Fundo's wetland to Paranoa lake and neighboring communities)
DOI:
https://doi.org/10.5935/1984-2295.20150085Keywords:
retenção de sólidos em suspensão, sequestro de carbono, conforto térmico, aeronave R-99Abstract
O Lago Paranoá é um lago artificial de Brasília, no Distrito Federal, de grande importância para a cidade e que demanda grandes cuidados, principalmente quanto à qualidade da sua água. Um dos seus principais afluentes, o Riacho Fundo, possui muitos sólidos e sedimentos em suspensão, o que poderia ser motivo para grandes preocupações, se não fosse pela wetland que naturalmente formou-se em sua foz, objeto desse estudo. Por meio de imagens do sensor Multispectral Scanner (MSS) embarcado na aeronave R-99 e de diferentes recursos de geoprocessamento, incluindo o Índice de Vegetação da Diferença Normalizada (NDVI), o Índice de Reflectância Fotoquímica (PRI) e o Mapeador de Ângulo Espectral (SAM) foi investigada a importância ambiental da wetland para o Lago Paranoá e comunidades vizinhas, especialmente quanto a três aspectos: retenção de sedimentos e sólidos em suspensão, sequestro de carbono e conforto térmico. Os resultados comprovaram que a wetland contribui de forma significativa para a melhoria da qualidade da água do Lago Paranoá, pois desempenha um importante papel de retenção dos sólidos em suspensão oriundos da montante do riacho e, além disso, coopera com a geração de oxigênio e conforto térmico, pois executa o sequestro de carbono de forma mais efetiva do que as áreas ao redor e possui temperaturas mais baixas em relação à margem e localidades próximas.
A B S T R A C T
The Paranoa Lake is an artificial lake of Brasilia-DF, very important for the city and that demands great care, especially regarding water quality. One of its main tributaries, the Riacho Fundo, has many solids and sediments in suspension, which could be cause for great concern, but a wetland naturally was formed at the downstream, object of this study. Using images of the airborne sensor of R-99 aircraft, Multispectral Scanner (MSS), and applying different resources of geoprocessing including Normalized Difference Vegetation Index (NDVI), Photochemical Reflectance Index (PRI) and Spectral Angle Mapper (SAM) was investigated the environmental importance of the wetland to the Paranoa Lake and neighboring communities, especially regarding to three aspects: suspended solids retention, carbon dioxide sink and thermal comfort. The results proved that the wetland contributes significantly to the improvement of water quality of Paranoa Lake, because it is able to retain the suspended solids coming from upstream, and also cooperates with the oxygen generation and thermal comfort, because it sinks carbon more strongly than the areas of margins and appears colder than the edges.
Keywords: suspended solids retention, carbon dioxide sink, thermal comfort, R-99 aircraft
Downloads
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2016 Breno Ricardo de Araujo Leite, Gustavo Macedo de Mello Baptista
This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors who publish with Revista Brasileira de Geografia Física agree to the following terms:
Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under the Creative Commons Attribution 4.0 International (CC BY 4.0) license that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
Authors are permitted to make their work available online before or during the editorial process, on academic social networks, digital repositories, or preprint servers. After publication in Revista Brasileira de Geografia Física, authors are expected to update the preprint or postprint versions on the platforms where they were originally made available, providing a link to the final published version and any other relevant information, with proper recognition of authorship and the initial publication in this journal.
You are free to:
Share — copy and redistribute the material in any medium or format for any purpose, even commercially.
Adapt — remix, transform, and build upon the material for any purpose, even commercially.
The licensor cannot revoke these freedoms as long as you follow the license terms.
Under the following terms:
Attribution — You must give appropriate credit , provide a link to the license, and indicate if changes were made . You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
