This paper presents the results of a research on uncertainty interval estimation of WetSpa model for flood simulation in Ve watershed. The method applied to uncertainty estimation is the GLUE methodology. The initial results show that uncertainty intervals obtained are reasonably capture the observations with the use of Nash-Sutcliff as likelihood measure. Over-estimation often occur with the low flow, which is acceptable in case of flood simulation. To estimate the prediction interval, the model should be run in prediction mode.
