摘要
以崔家营航电枢纽为代表,运用一维非恒定非均匀泥沙数学模型预测了枢纽下游河道冲刷趋势,数学模型预测成果表明航电枢纽修建后坝下游河道最大累计冲刷量与河床冲刷厚度均不大。通过对丹江口水库建库前后下游河道来水来沙和河床观测资料进行分析后发现,由于丹江口水库运行后下游河道发生了长时段、长距离的冲刷侵蚀,河床已较丹江口水库建库前有较明显的下切和粗化。另外因枢纽抬高水位不大,枢纽的兴建不会导致坝下游河床发生较大幅度调整。数学模型计算成果,可以为航电枢纽相关方面设计提供参考。
Based on the presentation of Cuijiaying navigation and hydropower junction, 1-D unsteady non-uniform sedimentation mathematical model s used to forecast downstream bed erosion of Cuijiaying navigation and hydropower junctions. The predicting results show that maximum scour quantity and bed erosion depth are very small. By analyzing measured runoff and sediment data since the Danjiangkou Reservoir was built, lower river course has experienced long-time erosion and degradation, the riverbed is coarsened and sediment-laden in non-saturated. In addition, the water level rising induced by junctions are quite higher, accordingly lower river courses are not eroded to a large extent. So, the simulated results of the mathematical model is reasonable and serve as a reference for the designing of Cuijiaying navigation and hydropower junctions.
出处
《中国农村水利水电》
北大核心
2009年第1期8-10,共3页
China Rural Water and Hydropower
关键词
航电枢纽
河床冲刷
一维非恒定水沙数学模型
navigation and hydropower junction
bed erosion
1-D unsteady non-uniform sedimentation mathematical model
