摘要
针对复式河道的特点,建立复式河道一维非恒定流数学模型,采用四点线性隐格式离散圣维南方程组,在动量方程中通过对主槽宽度进行修正,很好地解决了漫滩瞬间流量波动问题。通过2006年汛期调水调沙期间的实测资料对黄河下游白鹤—孙口河段洪水演进过程进行验证,结果表明,计算的洪峰变化过程比较符合实测情况,洪水传播时间的计算值与实测值基本吻合。
A one-dimensional unsteady numerical model for a compound channel is established, and the Saint-Venant equations are diseretized by use of the Preissmann weighted implicit four-point seherne. In the momentum equation, the width of the main channel is modified in order to avoid flow fluetuation at floodplain sites. On the basis of observed sediment-nmoff regulation data in 2006, this model was verified by flood routing along the Baihe and Sunkou reach of the lower Yellow River. It is shown that the calculated peak stage hydrograph and the time of propagation of the flood peak accord well with those of the observed flood. compound channel;flood routing; width of flood discharge; numerical simulation
出处
《水利水电科技进展》
CSCD
北大核心
2008年第5期6-9,共4页
Advances in Science and Technology of Water Resources
基金
“十一五”国家科技支撑计划重点项目(2006BAB06B02)
国家自然科学基金
黄河研究联合基金(50439020)
水利部黄河泥沙重点实验室开放基金(2007006)
关键词
复式河道
洪水演进
行洪宽度
数值模拟
compound channel
flood muting
width of flood discharge
numerical simulation
