本支在整理和分析赤湾有关实测资料的基础上,讨论了赤湾附近深槽水道和岸滩自然演变情况,并作叙述了赤湾港的泥沙来源和建港前湾内自然淤积情势。然后根据赤湾港及其附近的有关水文、地形图等资料,藉助于附近港口的淤积实际,采用计算港内淤积强度的半理论半经验公式对赤湾港分期建成后的港池和航道年平均淤积强度作出了预报。 Based on the data collected from Chiwan, this article discusses the natural evolution of deep channel and beach near Chiwan and describes the source of sediment in Chiwan Harbor and natural siltation in the bay before the harbor was built. Then, based on the information about hydrology and topography in Chiwan Harbor and its vicinity, and based on the siltation in the nearby port, the semi-theoretical and semi-empirical formula for calculating the siltation intensity in the port was used to calculate the annual average of the port basin and waterway after the completion of the Chiwan Port Sediment intensity made a forecast.