尾闾段河网一维水流数学模型应用研究  

Application of 1-D mathematical model of lower river networks

作　　者：戴文鸿[1,2,3] 张云[2] 高嵩[2] 李开杰[2] 王得祥[2] 

机构地区：[1]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]河海大学水利水电学院,江苏南京210098 [3]河海大学水资源高效利用与工程安全国家工程研究中心,江苏南京210098

出　　处：《水利水运工程学报》2011年第4期97-101,共5页Hydro-Science and Engineering

基　　金：水利部公益性行业科研专项经费项目(200901005);江苏高校优势学科建设工程资助项目(水利工程);中央高校基本科研业务费专项资金资助(2009B02214)

摘　　要：尾闾段河网常常是连接上下游的水上通航要道,且上游洪水需要通过尾闾段河网下泄,这就使得尾闾段河网水流运动的研究成为非常重要和十分必要的课题之一.在对尾闾段河网水流的运动特点及一维河网计算的研究现状评述的基础上,选用自编程序"河网水动力模型"和商用软件HEC-RAS分别建立一维河网水流模型,应用于赣江尾闾段,针对洪水流量、中水流量和枯水流量分别计算沿程水位.在洪水流量下,根据计算所得的水面线,找出各主要站点的水位作为警戒水位,当该站点水位有接近警戒水位的趋势时,提请有关部门应做好防洪工作.在中水期,主要考虑造床流量的影响.在枯水期,根据计算得出的水位,得到各主要站点的最低通航水位,为枯水期能否顺利通航提供依据.The lower river networks often connect the upstream and downstream of navigation routes, and the river flood discharges have to pass from the upstream to the river networks. This makes the research on the flow in lower river networks one of the most important and necessary researches. In this paper, the authors first review and summarize the methods for the river networks ; then, apply the self established 1-D hydrodynamic program, namely ＂hydrodynamic model for river networks＂, and the 1-D commercial software ＂HEC-RAS＂ to the lower Ganjiang River networks, separately; and calculate and analyze the flow in the flooding season, normal water period and dry season in lower Ganjiang river networks. In the flooding season, water surface is derived from the model to identify the major site of water level as a warning level, when the water level is close to the site warning level or has the trend to become close to the warning water level. At this point, the department concerned should prevent floods to reduce loss. In the normal water period, the effects made by dominant discharge should be considered. In the dry season, the water level at the main site according to the calculation of the model is considered to be the of lowest navigable level for the dry season. It can provide the basis for the smooth navigation.

关 键 词：一维水流 数学模型 HEC-RAS 尾闾段河网 

分 类 号：U612.14[交通运输工程—船舶及航道工程] TV147[交通运输工程—船舶与海洋工程]