Investigating changes in kinetic energy of turbulence and depth average velocity in meandering compound channel

Document Type : Research Paper

Authors

Department Water Science and Engineering, Faculty of Agriculture , Ferdowsi University of Mashhad, Mashhad, Iran.

10.22059/jwim.2025.381039.1176

Abstract

In recent decades, due to factors such as the effects of climate change, human activities, the occurrence of floods has increased all over the world. With the occurrence of floods, the water level in the rivers increases and the flow spreads from the main section of the river towards the floodplains. Considering the increase in population and the development of residential areas on the banks and riverbanks and the loss of life and money caused by floods, the study of turbulence and velocity changes in the meandering and meandering compound rivers for the more accurate implementation of flood management and river engineering projects is essential. In this research, the changes of hydraulic parameters including depth average velocity, turbulence intensity and energy of flow turbulence in two conditions of main channel flow (non-flood) and floodplain (flood flow) were investigated at depth and relative depth of 0.12 m and 0.46, respectively. The results showed that in the flow of the main channel, the maximum depth average velocity and turbulence intensity occur in the outer arc and in the middle sections in the center of the main channel. The maximum depth average velocity in the main channel flow has increased by 140% compared to the floodplain flow. In the conditions of the main channel flow, the magnitude of the turbulence energy was observed in the outer arc and in the floodplain flow in the inner arc. The maximum kinetic energy in the main channel has increased by 20% compared to its value in the floodplain.

Keywords

Main Subjects

References

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Water and Irrigation Management
Volume 15, Issue 1
May 2025
Pages 93-108

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