长江口航道治理研究中数、物模技术的应用

潮汐河口受径流和潮流共同作用。径潮流动力的不同及其复杂的时空变化导致河口的不同区段水沙特性等也明显不同。在河口治理研究和工程实践中必须充分考虑这些特征。河口治理研究应采用数模、物模多种手段综合研究的方 法，因数模和物模技术具有不同的特点和适用范围，研究方法及具体评价指标应根据研究区段的水沙特性和研究目的合理选用。以长江口深水航道治理工程的实践为例，介绍数物模综合研究技术的应用及效果。

Application of numerical model and physical model to study on the Yangtze estuary waterway regulation

The tidal estuary is jointly influenced by the river flow and tidal current. The dynamic difference of the tidal current and river flow and their complex temporal and spatial variation result in obviously different characteristics of water and sediment in different river reaches. The characteristics should be taken into account during the study of estuary regulation. An intergraded method combining numerical model and physical model are consequently adopted in the estuary regulation. Due to the fact that numerical model and physical model have different features and application scopes, the research method and evaluation index should be reasonably selected according to the characteristics of water and sediment in a specific river reach and research purposes. Based on the practice of the Improvement Project of the Deep-draft Channel of the Yangtze Estuary, the application of comprehensive research of numerical model and physical model and their effects are presented.