%0 Journal Article %T Uncertainty Analysis ofWater Surface Profile Computations in Rockfill Structures Using Fuzzy Probabilistic Method %J Journal of Hydraulics %I Iranian Hydraulic Association %Z 2345-4237 %A Yousefi, A. %A Hosseini, M. %D 2013 %\ 01/20/2013 %V 7 %N 4 %P 37-52 %! Uncertainty Analysis ofWater Surface Profile Computations in Rockfill Structures Using Fuzzy Probabilistic Method %R 10.30482/jhyd.2013.85354 %X Rockfill is one of the construction materials used in hydraulic structures. Water surface profilecomputations are required in the design and performance evaluation of many rockfill structures. Inwater surface profile computations in rockfill structures, some physical parameters cannot beaccurately measured and are uncertain. Uncertainty analysis can be used to estimate the uncertainty inthe output of a model due to uncertainty in its input parameters. In this study, uncertainty analysis ofwater surface profile computation in rockfill structures is conducted using a hybrid approach which isa fuzzy probabilistic method. This is done for Wilkins and Stephenson empirical equations and theresults are compared with those of a physical model. Results indicate that the Stephenson equationshows a better agreement with the experimental data. Also, if fuzzy parameters are estimated properly,the Stephenson equation shows less uncertainty. %U https://jhyd.iha.ir/article_85354_4ae8565a35214526934f078c97e5138c.pdf