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。

Based on the theory of jet diffusion the formula for predicting the position of dune in equilibrium scour pit are deduced theoretically.

youdao

实验观测了射流局部达到冲刷平衡时，最大冲刷深度随射流喷口高度、喷口宽度、喷口流速、横流流速及泥沙特性变化的规律。

The variations of the local scour equilibrium depth with the parameters of the jet, such as jet exit height, width, velocity and sediments characteristics, were observed in the experiments.

youdao

并进行多组冲刷数值实验，分析泥沙冲刷过程，总结出一套冲刷平衡深度经验公式。

Groups of scour experiment were took and the process of scour was analyzed. Finally, a empirical formula about scour deep was concluded.

youdao