Water level updating model for flow calculation of river networks

作     者：Xiao-ling WU Xiao-hua XIANG Li LI Chuan-hai WANG 

作者机构：College of Hydrology and Water ResourcesHohai University State Key Laboratory of Hydrology-Water Resources and Hydraulic EngineeringHohai University Zhenjiang Engineering Survey and Design Institute Co.Ltd. 

出 版 物：《Water Science and Engineering》 (水科学与水工程（英文版）)

年 卷 期：2014年第7卷第1期

页      面：60-69页

核心收录：

学科分类：08[工学] 081501[工学-水文学及水资源] 0815[工学-水利工程] 

基　　金：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) the Open Research Fund Program of the State Key Laboratory of Water Resources and Hydropower Engineering Science of Wuhan University(Grant No.2012B094) 

主　　题：plain river network cyclic looped channel network water level updating model hydrodynamic model, error correction 

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.