Based on the theory of jet diffusion the formula for predicting the position of dune in equilibriumscour pit are deduced theoretically.
并在此基础上，利用射流扩散理论导出平衡冲刷坑堆丘位置的预报公式。
2
The variations of the local scourequilibrium depth with the parameters of the jet, such as jet exit height, width, velocity and sediments characteristics, were observed in the experiments.