Determination of discharge in rivers is one of the most important problems that is considered in river hydraulics. Researchers and designers have always been trying to access simpler and cheaper methods to estimate discharge. This research aims to facilitate determination of discharge by applying remote sensing technique as well as the concept of isovel contours. For this purpose, the geometry of the river cross section is determined using remotely sensed data from images of Sentinel-2 satellite and then discharge passed through the cross section is estimated by the single point velocity measurement method (SPM). In order to verify this method, observations have been conducted at the Molla-sani station located in the Karun River, Iran. The obtained discharges are used to evaluate the accuracy of the proposed methodology. Results of statistical analyses show that the mean value of the percentage error calculated based on the difference between the estimated and observed discharges is within 6.3%.

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