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

Abstract:

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.

Key words: model；discharge distribution along channel； nonequilibrioum transportation；sediment concentration hydrograph forecasting；Yellow River