The article discusses how to regulate the waterway between Anxiang and Maocaojie in Dongting Lake. This area experiences changes in water and sand levels due to flooding, leading to erosion and the formation of dangerous shoals. By studying the Qixingdui shoal as an example, the researchers developed methods to design and regulate these types of shoals. They found that grooving arrangements can help control erosion and maintain safe navigation in the waterway.