The purpose of this work is to analyze the morphometric characteristics that the Upano River sub-basin presents with the help of SIG tools, which is located in the Ecuadorian Amazon in the Morona Santiago Province. For the analysis of the study, nine morphometric parameters were taken into consideration: area, perimeter, axial length, length of the main channel, total drainage length, average width, shape factor, Gravelius coefficient of compactness or Gravelius index, Drainage density and their results were calculated using ArcGIS® software using the ArcMap® tool. The area of the sub-basin comprises approximately 6075.54 km2 with its main channel 266.73 km long. The compactness coefficient is related to the concentration time, being a dimensionless value, resulting in 1.35 which presents a round oval to oblong oval shape. From this result, an environmental interpretation was made using the Gravelius index and it was determined that the sub-basin of the Upano River is medium with a tendency to floods. Keywords: morphometric characteristics; sub-basin, parameters, Gravelius index, drainage density. Resumen La finalidad del presente trabajo es analizar las características morfométricas que presenta la subcuenca del rio Upano con ayuda de herramientas SIG, la cual se encuentra ubicada en la Amazonía ecuatoriana en la Provincia de Morona Santiago. Para el análisis del estudio se tomó en consideración nueve parámetros morfométricas: área, perímetro, longitud axial, longitud del cauce principal, longitud total de drenaje, ancho promedio, factor forma, coeficiente de compacidad de Gravelius o índice de Gravelius, densidad de drenaje y sus resultados fueron calculados por medio del software ArcGIS® mediante la herramienta ArcMap®. El área de la subcuenca comprende aproximadamente 6075,54 km2 y su cauce principal de 266,73 km de longitud. El coeficiente de compacidad está relacionado con el tiempo de concentración siendo un valor adimensional, teniendo como resultado 1,35 lo cual presenta una forma de oval redonda a oval oblonga. A partir de dicho resultado se realizó una interpretación ambiental por medio del índice de Gravelius y se pudo determinar que la subcuenca del Rio Upano es mediana a tendencia a inundaciones. Palabras Clave: características morfométricas, subcuenca, parámetros, índice de Gravelius, densidad de drenaje.
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