梯级电站联合调节非恒定流对枢纽间航运安全的影响

Effect of unsteady flow caused by joint regulation of cascade hydropower stations on safety navigation between dams

摘要: 针对嘉陵江干流中游亭子口至沙溪航电枢纽间河段建立了非恒定流数学模型,并采用基于Preissmann四点隐格式的有限差分法进行求解.利用2001年亭子口至沙溪河段实测的洪、中、枯下沿程各断面水面线资料率定模型综合糙率值.用黄河四龙至龙湾段2002年实测资料对模型精度进行了验证.应用该模型分别计算梯级电站联合调节时苍溪反调节枢纽兴建前后亭子口至苍溪段非恒定流水流条件,并做对比分析.结果表明梯级电站联合调节时反调节枢纽的兴建能明显改善河段通航水流条件.

Abstract: An unsteady flow model is established for numerical simulation of flow between Tingzikou and Shaxi Dam in the middle reach of the Jialingjiang River.Finite difference method based on Preissmann 4-point implicit scheme is employed in the study.Roughness coefficients are rated by using the measured water surface data of the river reach during flood,and the medium and low stages in the year of 2001.The model with corresponding numerical methods are verified by the field water surface profile data of Silong to ...