磨刀门是珠江八大口门中下泄量最大的一个。1977年我所受珠江三角洲整治规划办公室委托,开展了磨刀门河口的水文泥沙调查;鉴于前人已在磨刀门内开展过水文泥沙调查和水利问题研究,故本次调查范围侧重在河口段泄水深槽和口外海滨段,进行多点同步观测和必要的检测。本文根据实测资料整理而成,着重阐述磨刀门泄水深槽及其口外海滨的水文泥沙特征,为磨刀门口门整治提供新资料。 Grinding knife gate is the largest port in the Pearl River eight largest one. In 1977, I was commissioned by the Pearl River Delta Regulation and Planning Office to carry out hydrological and sediment investigations at the Modaomen estuary. In view of the fact that predecessors have conducted hydrological and sediment investigations and water conservancy studies at the Modaomen, the scope of the survey focuses on In the estuary deep drainage trench and the mouth of the offshore section, multi-point synchronous observation and the necessary testing. Based on the measured data, this paper focuses on the characteristics of hydrological sediment in the deep groove of Sabo Gate and the waterfront outside the mouth, and provides new information for the renovation of the knife gate.