| Summary: | Abstract 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 km 2 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.
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