Deformation of flood wave during ice river period in the Ningxia-Inner Mongolian Reach of the Yellow River

The existence of ice cover in northern river courses may affect flood rooting and the deformation of flood wave propagation. Taking the Ningxia-Inner Mongolia Reach of the Yellow River as the research object, the Muskingum method is applied to calculate the flood rooting during ice period, analyzing the relationship between the Muskingum parameters and the roughness, and comparing the difference of the impacts of ice cover thickening and thawing processes on the flood wave deformation. The results indicate that it is feasible to apply the Muskingum method to calculate flood during ice river period, the greater the section roughness, the longer the flood wave propagation and the greater the degree of deformation will be. During the ice cover thickening process, the deformation of flood wave increases at first, then decreases, and afterward increases again. During the ice cover thawing process, the deformation of flood wave increases. In the case of same ice thickness, there is an intersection of flood wave deformation during two processes of ice thickness development. Before the intersection point of ice thickness range, the deformation of flood wave is greater when ice cover melts and thins. After that, the deformation of flood wave is greater when ice cover freezes and thickens. © 2018, China Water Power Press. All right reserved.