平原区河网水流计算校正模型  

Correction model for flow calculation of plain river network

作　　者：吴晓玲[1,2] 向小华[1,2] 李菲菲[3] 王船海[1,2] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098 [2]河海大学水文水资源学院,江苏南京210098 [3]吉林省电力勘测设计院,吉林长春130022

出　　处：《河海大学学报（自然科学版）》2012年第1期48-51,共4页Journal of Hohai University(Natural Sciences)

基　　金：国家自然科学基金(51009045;51079038;40930635);国家重点基础研究发展计划(973计划)(2009CB421105);中央高校基本科研业务费专项(2009B06614;2010B00414);海洋公益性行业科研专项(200905013-8);水利部公益性行业科研专项(201101024)

摘　　要：为提高平原河网水流计算的精度,针对其中交错相连的复杂河网水流运动以及测点又相对较少的情况,提出以环状河网节点水位三级解法为基础、河段方程系数为载体的平原河网校正模型.将观测位置上的模型系统误差校正信息由测点向河网其他断面传播,修正相邻河道断面的水位、流量预报值.选择长江澄通段河网进行实例分析,选用2004年9月的水文资料进行演算.结果表明,该方法能在一定空间范围内有效地传播误差修正量,对提高河网水流预报精度具有实用意义.Complex water movement and fewer measuring points are the unfavorable factors in improving the accuracy of flow calculation of river networks. For this reason, a correction model for a plain river network was developed based on the three-step method in dealing with the water levels at key nodes of a looping river network, with the coefficients in the equation considered to be the media carrying the correction information. The correction information of the model errors at observation stations was transmitted to the other cross sections of the river network to correct the forecasted values of water levels and discharges at the cross sections of neighboring rivers. A case study was conducted in the river network of the Chengtong section of the Yangtze River. Hydrological data in September 2004 were selected for model calculation. The results show that the proposed model can effectively transmit the correction information of model errors in a certain spatial range and has practical significance in improving the accuracy of forecasts for river networks.

关 键 词：水流计算 环状河网 平原区河网 校正模型 水动力学模型 

分 类 号：TV131.4[水利工程—水力学及河流动力学]