Surface runoff is one of the most important hydrological cycle components associated with water erosion, being responsible for sediment transport. Several hydrological models have been developed for a better understanding of this process and for representing the hydrological behavior of the watershed. The objective of this study is to analyze the Nash Conceptual Model for Instantaneous Unit Hydrograph (IUH) generating the flow behavior in the Ribeirão Marcela Watershed, Alto Rio Grande region. The IUH generated by the Nash Conceptual Model presents a good accuracy for the modeling of surface runoff hydrograph in this watershed.
Nash's modeling; surface runoff; unit hydrograph
