Changes in soil cover in Nechí, Antioquia: An approach to the environmental impact of mining, 1986-2010
The municipality of Nechí (Antioquia, Colombia) has a long mining history associated with the extraction of gold. This paper evaluates the evolution of land cover changes caused by this mining activity over 24 years. The spatial analysis was based on the Normalized Difference Vegetation Index (NDVI)...
| Main Authors: | , , , , |
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| Format: | Online |
| Language: | eng |
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Universidad Pedagógica y Tecnológica de Colombia
2017
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| Online Access: | https://revistas.uptc.edu.co/index.php/ingenieria/article/view/6423 |
| _version_ | 1801706079119212544 |
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| author | Gómez-Rodríguez, Michael Ezequiel Molina-Pérez, Francisco José Agudelo-Echavarría, Diana María Cañón-Barriga, Julio Eduardo Vélez-Macías, Fabio de Jesús |
| author_facet | Gómez-Rodríguez, Michael Ezequiel Molina-Pérez, Francisco José Agudelo-Echavarría, Diana María Cañón-Barriga, Julio Eduardo Vélez-Macías, Fabio de Jesús |
| author_sort | Gómez-Rodríguez, Michael Ezequiel |
| collection | OJS |
| description | The municipality of Nechí (Antioquia, Colombia) has a long mining history associated with the extraction of gold. This paper evaluates the evolution of land cover changes caused by this mining activity over 24 years. The spatial analysis was based on the Normalized Difference Vegetation Index (NDVI) of three LANDSAT images (1986, 1996 and 2010). The difference in NDVI values between 1986 and 2010 were used to determine the actual state of vegetation, the direction of change (improvement, stability or deterioration), and the area associated with each soil cover. Polygons for different types of coverage (forest, pasture, bare soil, and water bodies) were extracted from each satellite image to quantify the changes and develop land cover maps for each year. Results show that almost 124.8 km² of forest have been lost during the analyzed period. By contrast, water bodies gained an area of 66.3 km². Both results may be related to the type of gold exploitation in the region. |
| format | Online |
| id | oai:oai.revistas.uptc.edu.co:article-6423 |
| institution | Revista Facultad de Ingeniería |
| language | eng |
| publishDate | 2017 |
| publisher | Universidad Pedagógica y Tecnológica de Colombia |
| record_format | ojs |
| spelling | oai:oai.revistas.uptc.edu.co:article-64232022-06-15T16:17:56Z Changes in soil cover in Nechí, Antioquia: An approach to the environmental impact of mining, 1986-2010 Cambios en la cobertura del suelo en el municipio de Nechí: Una aproximación al impacto ambiental de la minería, 1986-2010 Gómez-Rodríguez, Michael Ezequiel Molina-Pérez, Francisco José Agudelo-Echavarría, Diana María Cañón-Barriga, Julio Eduardo Vélez-Macías, Fabio de Jesús GIS Landsat Mining NDVI Soil cover Cobertura del suelo Minería NDVI Landsat SIG The municipality of Nechí (Antioquia, Colombia) has a long mining history associated with the extraction of gold. This paper evaluates the evolution of land cover changes caused by this mining activity over 24 years. The spatial analysis was based on the Normalized Difference Vegetation Index (NDVI) of three LANDSAT images (1986, 1996 and 2010). The difference in NDVI values between 1986 and 2010 were used to determine the actual state of vegetation, the direction of change (improvement, stability or deterioration), and the area associated with each soil cover. Polygons for different types of coverage (forest, pasture, bare soil, and water bodies) were extracted from each satellite image to quantify the changes and develop land cover maps for each year. Results show that almost 124.8 km² of forest have been lost during the analyzed period. By contrast, water bodies gained an area of 66.3 km². Both results may be related to the type of gold exploitation in the region. El municipio de Nechí (Antioquia, Colombia) es una zona influenciada por la minería aurífera desde épocas prehispánicas. En este artículo se evalúa la evolución de los cambios de cobertura del suelo producidos por la minería aurífera durante 24 años. El análisis espacial de cada imagen fue basado, principalmente, en el cálculo del Índice de Vegetación de Diferencias Normalizada (NDVI) de tres imágenes LANDSAT de los años 1986, 1996 y 2010. Adicionalmente, se calculó la Diferencia de NDVI entre los dos años extremos, con el fin de analizar el estado actual de la vegetación; la dirección de su cambio, es decir, si hubo mejoría, estabilidad o deterioro, y cuantificar la extensión asociada con cada cubierta del suelo. Se extrajeron polígonos para los diferentes tipos de coberturas de cada imagen satelital (bosques, pastos, suelo desnudo y cuerpos de agua), para cuantificar los cambios y elaborar los mapas de cobertura del suelo para cada año. Los resultados muestran que casi 124,8 km² de bosque se han perdido en el período analizado; por el contrario, los cuerpos de agua ganaron un área de 66,3 km²; ambos resultados pueden estar relacionados principalmente con el tipo de explotación del oro en la región. Universidad Pedagógica y Tecnológica de Colombia 2017-04-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion investigation investigación application/pdf application/xml https://revistas.uptc.edu.co/index.php/ingenieria/article/view/6423 10.19053/01211129.v26.n45.2017.6423 Revista Facultad de Ingeniería; Vol. 26 No. 45 (2017); 149-163 Revista Facultad de Ingeniería; Vol. 26 Núm. 45 (2017); 149-163 2357-5328 0121-1129 eng https://revistas.uptc.edu.co/index.php/ingenieria/article/view/6423/5593 https://revistas.uptc.edu.co/index.php/ingenieria/article/view/6423/6414 |
| spellingShingle | GIS Landsat Mining NDVI Soil cover Cobertura del suelo Minería NDVI Landsat SIG Gómez-Rodríguez, Michael Ezequiel Molina-Pérez, Francisco José Agudelo-Echavarría, Diana María Cañón-Barriga, Julio Eduardo Vélez-Macías, Fabio de Jesús Changes in soil cover in Nechí, Antioquia: An approach to the environmental impact of mining, 1986-2010 |
| title | Changes in soil cover in Nechí, Antioquia: An approach to the environmental impact of mining, 1986-2010 |
| title_alt | Cambios en la cobertura del suelo en el municipio de Nechí: Una aproximación al impacto ambiental de la minería, 1986-2010 |
| title_full | Changes in soil cover in Nechí, Antioquia: An approach to the environmental impact of mining, 1986-2010 |
| title_fullStr | Changes in soil cover in Nechí, Antioquia: An approach to the environmental impact of mining, 1986-2010 |
| title_full_unstemmed | Changes in soil cover in Nechí, Antioquia: An approach to the environmental impact of mining, 1986-2010 |
| title_short | Changes in soil cover in Nechí, Antioquia: An approach to the environmental impact of mining, 1986-2010 |
| title_sort | changes in soil cover in nechi antioquia an approach to the environmental impact of mining 1986 2010 |
| topic | GIS Landsat Mining NDVI Soil cover Cobertura del suelo Minería NDVI Landsat SIG |
| topic_facet | GIS Landsat Mining NDVI Soil cover Cobertura del suelo Minería NDVI Landsat SIG |
| url | https://revistas.uptc.edu.co/index.php/ingenieria/article/view/6423 |
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