摘要
针对感潮河段水流情势复杂、不易获得河道地形资料的问题,考虑充分应用已有水位实测资料,采用扩散波和双向波方法建立感潮河段水位演算模型,扩散波方法以水位为研究对象,求解线性扩散波方程定解问题的解析解,双向波方法将洪水过程分解为上游洪水波和下游潮水波,分别应用水位演算方法将这两种波独立演算至计算断面,再将其演算结果进行线性叠加得到计算断面的水位过程。将上述两类模型应用于新沂河和楠溪江感潮河段水位演算中,模拟精度良好。
The flow characteristic of the tidal river is always complicated,and the topographical data is not available easily.In order to take fully use of water level data,the stage routing model for tidal reach is established using the diffusion wave method and bi-directional wave method.The analytical solution of the linear diffusion-wave equation is solved,and the stage routing model is established.As to the bi-directional stage routing model,the flood hydrograph at the forecasting section is considered as the linear superposition between flood waves from upstream and tide waves from downstream,and each propagation process simulated with the stage routing method independently.The above two models are applied at the stage routing of tidal reaches for Xinyi River and Nanxi River,and simulated precision is satisfactory.
出处
《水电能源科学》
北大核心
2010年第7期1-5,共5页
Water Resources and Power
基金
水利部公益性行业科研专项经费基金资助项目(200801033)
华南理工大学中央高校基本科研业务费专项基金资助项目(2009ZM0051,2009ZM0044)
