摘要
本文从水沙运动机理出发,将简化的一维不平衡输沙模型与假定河道水量调节为线性水库式调节前提下推导出的河道流量沿程变化模型相结合,建立了冲积性河流含沙量过程预报模型。并利用花园口—夹河滩河段以及龙门—潼关河段水沙资料对模型的模拟效果进行了检验。结果表明,由于模型考虑了流量沿河道纵向上的变化,而使模型的模拟预报效果较单一的一维恒定均匀流不平衡输沙模型有明显改善,含沙量模拟预报效果较满意。
From the mechanism of river flow and sediment movement, this paper built a model for forecasting sediment concentration of an alluvial river by combining stable sediment nonequilibrium transportation model with discharge distribution model along channel which was derived from the assumption that the amount of river water regulation for the linear reservoir regulator. The observations of water and sediment from the Huayuankou to Jiahetan section and from the Longmen to Tongguan section at the Yellow River had been used to verify the proposed model, which indicated that since the change of discharge along channel has been considered, the proposed model made better forecasting performance than stable nonequilibrium transportation model used solely and the forecasts were reasonably satisfied.
出处
《地理科学进展》
CSCD
北大核心
2009年第4期553-557,共5页
Progress in Geography
基金
国家"十一五"科技支撑项目(2006BAB06B05-2)
关键词
模型
流量沿程变化
不平衡输沙
含沙量过程预报
黄河
model
discharge distribution along channel
nonequilibrioum transportation
sediment concentration hydrograph forecasting
Yellow River
