| Water level updating model for flow calculation of river networks简 |
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| 作者姓名： | Xiao-ling WU Xiao-hua XIANG Li LI Chuan-hai WANG |
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| 基金项目： | This work was supported by the Major Program of the National Natural Science Foundation of China （Grant No. 51190091）, the National Natural Science Foundation of China （Grant No. 51009045）, and the Open Research Fund Program of the State Key Laboratory of Water Resources and Hydropower Engineering Science of Wuhan University （Grant No. 2012B094）. |
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| 摘 要： | Complex water movement and insufficient observation stations are the unfavorable factors in improving the accuracy of flow calculation of river networks. A water level updating model for river networks was set up based on a three-step method at key nodes, and model correction values were collected from gauge stations. To improve the accuracy of water level and discharge forecasts for the entire network, the discrete coefficients of the Saint-Venant equations for river sections were regarded as the media carrying the correction values from observation locations to other cross-sections of the river network system. To examine the applicability, the updating model was applied to flow calculation of an ideal river network and the Chengtong section of the Yangtze River. Comparison of the forecast results with the observed data demonstrates that this updating model can improve the forecast accuracy in both ideal and real river networks.
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| 关 键 词： | 更新模型 流量计算 河网 水位 预测精度 圣维南方程 流量预报 离散系数 |
| 收稿时间： | 15 July 2012 |
Water level updating model for flow calculation of river networks |
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| Xiao-ling WU Xiao-hua XIANG Li LI Chuan-hai WANG.Water level updating model for flow calculation of river networks[J].Water Science and Engineering,2014,7(1):60-69. |
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| Authors: | Xiao-ling WU Xiao-hua XIANG Li LI Chuan-hai WANG |
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| Affiliation: | [1]College of Hydrology and Water Resources, Hohai University, Nanjing 210098, P. R. China [2]State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, P. R. China [3]Zhenjiang Engineering Survey and Design Institute Co., Ltd., Zhenjiang 212003, P. R. China |
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| Abstract: | Complex water movement and insufficient observation stations are the unfavorable factors in improving the accuracy of flow calculation of river networks. A water level updating model for river networks was set up based on a three-step method at key nodes, and model correction values were collected from gauge stations. To improve the accuracy of water level and discharge forecasts for the entire network, the discrete coefficients of the Saint-Venant equations for river sections were regarded as the media carrying the correction values from observation locations to other cross-sections of the river network system. To examine the applicability, the updating model was applied to flow calculation of an ideal river network and the Chengtong section of the Yangtze River. Comparison of the forecast results with the observed data demonstrates that this updating model can improve the forecast accuracy in both ideal and real river networks. |
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| Keywords: | plain river network cyclic looped channel network water level updating model hydrodynamic model error correction |
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