Water level updating model for flow calculation of river networks

作者：Wu Xiao Ling^*; Xiang Xiao Hua; Li Li; Wang Chuan Hai

来源：Water Science and Engineering, 2014, 7(1): 60-69.

DOI：10.3882/j.issn.1674-2370.2014.01.007

• Channel network
• Flow calculations
• Forecast accuracy
• Hydrodynamic model
• Model corrections
• Plain river networks
• Saint Venant equation
• Water movements

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.

• 出版日期2014
• 单位河海大学