| Revue: | Investigaciones geográficas - Instituto de Geografía. UNAM |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000451115 |
| ISSN: | 0188-4611 |
| Autores: | Flores Rodríguez, Ana Graciela1 Flores Garnica, José German2 González Eguiarte, Diego Raymundo1 Gallegos Rodríguez, Agustín1 Zarazúa Villaseñor, Patricia1 Mena Munguía, Salvador1 |
| Instituciones: | 1Universidad de Guadalajara, Centro Universitario de Ciencias Biológicas y Agropecuarias, Nextipac, Jalisco. México 2Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias, Tepatitlán, Jalisco. México |
| Año: | 2021 |
| Número: | 106 |
| País: | México |
| Idioma: | Español |
| Tipo de documento: | Artículo |
| Enfoque: | Analítico, descriptivo |
| Resumen en inglés | The effects of forest fires on ecosystems are variable depending on the severity of the fire. However, its evaluation in the field means a significant expenditure of resources, either due to its breadth or inaccessibility in the field. Due to this, alternative strategies have been implemented, such as the use of spectral indices derived from remote sensors. However, there is a large number and diversity of these, so in this work a comparative analysis was made in relation to the detection and classification of the severity of a forest fire, which occurred in 2018 in a pine-oak forest. The indices were derived from Landsat 8 images (OLI) and were grouped as: a) Monotemporal (They consider a single image date): NIR = Band 5 near infrared; NDVI = Normalized Difference Vegetation Index; NDWI = Normalized Difference Water Index; NBR = Normalized burn ratio; EVI = Improved Vegetation Index; NBRT = Normalized burn ratio with thermal band BAI = Burned area index; OSAVI = Optimized soil adjusted vegetation index; GCI = Green Chlorophyll Index; SIPI = Structure insensitive pigmentation index; GNDVI =, Green Normalized Difference Vegetation Index; GRMI = Global Environmental Monitoring Index; and b) Bitemporal (For its estimation, two image dates are used, one before and the other after the fire): RdNBR = Relative difference of normalized burn ratio; dNBR = Normalized Burning Ratio Difference; RBR = Relative Combustion Ratio; RI = Regeneration Index; NRI = Normalized Regeneration Index; dNDVI = Normalized difference vegetation index difference. These indices were applied to immediate images prior to the fire and to images obtained during a rainy season after the occurrence of the fire, and were compared with the severity observed in the field during a rainy season after the occurrence of the fire. Subsequently, a severity classification was applied into three categories: unburned, moderate severity and very high severity. This by dividing by natural breaks the value |
| Disciplinas: | Geografía, Agrociencias |
| Palabras clave: | Cartografía, Silvicultura, Incendios forestales, Impacto ambiental, Imágenes de satélite, Landsat |
| Keyword: | Cartography, Silviculture, Forest fires, Fire, Environmental impact, Satellite images, Landsat |
| Texte intégral: | Texto completo (Ver HTML) Texto completo (Ver PDF) |
