Análisis de la cobertura vegetal y cambio de uso de suelo en el área de influencia del canal Azúcar-Río Verde mediante teledetección.
Fecha
2018
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Facultad de Ciencias Naturales, Universidad de Guayaquil
Resumen
Se realizó el análisis multitemporal de la cobertura de uso de suelo en un área de influencia de 22649,15 hectáreas alrededor del canal Azúcar-Río Verde para la cuantificación de coberturas de uso de suelo en el período 1998-2017 mediante clasificación supervisada se usaron imágenes Landsat de tres años distintos, las clasificaciones se validaron mediante matrices de confusión donde los índices Kappa oscilaron entre 0,87 y 0,91, validando la clasificación realizada mediante áreas de entrenamiento y verificación tomadas en el área de estudio. Las tasas de cambio anual calculadas indicaron un crecimiento de 5,55% de tierra agropecuaria, 1,86% de zona antrópica y 0,81 % de otras tierras, mientras que los cuerpos de agua y la cobertura vegetal decrementaron en -3,08% y -1,87% respectivamente, aceptándose la hipótesis planteada. Se concluye que existe un notable crecimiento de las zonas agrícolas a partir de la operación del canal Azúcar-Río Verde en 1998, lo que produjo también crecimiento de la zona urbana y disminución del volumen de recurso hídrico debido a su utilización. Todos estos hallazgos facilitan la comprensión de los beneficios que trajo la única infraestructura construida en la provincia de Santa Elena, de lo que constituía el Plan Hidráulico Acueducto Santa Elena (PHASE).
The multitemporal analysis of the land use coverage in an area of influence of 22649,15 hectares around the Azúcar-Río Verde canal was carried out for the quantification of land use coverage in the period 1998-2017 through supervised classification using Landsat images from three different years, the classifications were validated using confusion matrices where the Kappa indexes ranged between 0.87 and 0.91, validating the classification made by training and verification areas taken in the study area. The calculated annual change rates indicated a growth of 5.55% of agricultural land, 1.86% of the anthropogenic zone and 0.81% of other lands, while the bodies of water and vegetation cover decreased by -3.08. % and -1.87% respectively, accepting the proposed hypothesis. It is concluded that there is a remarkable growth of agricultural areas after the operation of the Azúcar-Río Verde canal in 1998, which also produced growth in the urban area and a decrease in the volume of water resources due to its use. All these findings facilitate the understanding of the benefits brought by the only infrastructure built in the province of Santa Elena, of what constituted the Plan Hidráulico Acueducto Santa Elena (PHASE).
The multitemporal analysis of the land use coverage in an area of influence of 22649,15 hectares around the Azúcar-Río Verde canal was carried out for the quantification of land use coverage in the period 1998-2017 through supervised classification using Landsat images from three different years, the classifications were validated using confusion matrices where the Kappa indexes ranged between 0.87 and 0.91, validating the classification made by training and verification areas taken in the study area. The calculated annual change rates indicated a growth of 5.55% of agricultural land, 1.86% of the anthropogenic zone and 0.81% of other lands, while the bodies of water and vegetation cover decreased by -3.08. % and -1.87% respectively, accepting the proposed hypothesis. It is concluded that there is a remarkable growth of agricultural areas after the operation of the Azúcar-Río Verde canal in 1998, which also produced growth in the urban area and a decrease in the volume of water resources due to its use. All these findings facilitate the understanding of the benefits brought by the only infrastructure built in the province of Santa Elena, of what constituted the Plan Hidráulico Acueducto Santa Elena (PHASE).
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KAPPA, LANDSAT, TELEDETECCIÓN, PHASE, USO DE SUELO