The Impact of Effective Parameters on Muskingum-Cunge in Comparison with Dynamic Routing

River stage or flow rates are required for the design and evaluation of hydraulic structures and water resources management systems. Accordingly flood routing techniques are used to predict the river stage and flow rates while flood wave propagates along the river. The aim of this paper is to compare the Muskingum–Cunge method with constant and variable parameters with Dynamic flow routing. The results showed that the errors in application of Muskingum-Cunge method in rivers with low slope are high and therefore some concerns should be taken when using Muskingum-Cunge in low slopes rivers. Sensitivity analysis showed that the most dominant parameters on the peak outflow are orderly the peak inflow rate, the roughness coefficient, and the bed slope. Also, the most important parameters on peak timing of outflow are orderly the channel length and the roughness coefficient.