长江和黄河是世界著名的多沙河流,每年入海泥沙分别为5亿吨和11亿吨,分别占世界的第四位和第二位。千万年来由她们发育了广大的冲积平原,浩浩荡荡东流入海,形成东中国海大陆架沉积物的主要来源。研究长江和黄河沉积物搬运入海的沉积动力过程,不仅对东海大陆架的了解和开发有重要意义,也给陆上经济发展提供科学依 The Yangtze River and the Yellow River are the world-famous Douhe rivers. Sediment entering the sea each year is 500 million tons and 1.1 billion tons respectively, accounting for the fourth and the second respectively in the world. For thousands of years they developed vast alluvial plains and marched eastward into the sea, forming the major source of sediments in the East China Sea shelf. Studying the depositional dynamics of sediment transport in the Yangtze River and the Yellow River into the sea is of great significance not only for the understanding and development of the continental shelf in the East China Sea but also for the onshore economic development