Abstract: Aiming?at?the?movement?characteristics?of?the?flow?and?sediment?in?Rongjiang?River?and?combining?with?the?waterway?regulation?engineering,?the?two-dimensional?mathematical?model?which?simulates?the?movement?characteristics?of?the?flow?and?sediment?in?this?area?is?established.?The?field?measurement?data?are?adopted?to?verify?the?correctness?of?the?model,?and?the?simulation?result?is?closely?fitted?with?the?field?data,?which?shows?that?the?model?is?creditable?to?simulate?the?movement?situation?of?water?and?sediment?in?tidal?river.?Therefore,?it?can?provide?the?technical?support?for?the?waterway?regulation.

Key words: Rongjiang River , 2D planar model , numerical simulation , waterway regulation

摘要： 针对榕江的水沙运动特点,结合工程河段的航道整治工程,建立了适合该区域的二维水沙数学模型,模拟该 区域的水沙运动情况,并采用实测资料进行了模型验证,所得计算结果与实测资料比较吻合。证明模型能较好地 模拟受潮汐影响河道的水流泥沙运动情况,可为河道的整治提供技术支持。

关键词: 榕江, 平面二维模型, 数值模拟, 航道整治