| 摘要: |
| 【目的】解决复杂地形条件下天然河道间断水面线计算问题。【方法】采用预测-校正求解方法，在一维河床冲淤变形计算模型基础上，增加了急流均匀流水深与临界水深判断公式，为解决河道正坡、倒坡交替出现，突扩、突缩频繁发生的复杂地形条件下水面线计算的不连续性问题，并将该方法在黄河羊曲水电站河段进行了实例验证。【结果】建立了解决复杂地形条件下天然河道水面线计算模型，并将该模型进行实例验证，结果表明，用该模型计算的水面线与实测水面线吻合较好，可满足工程设计的精度要求。【结论】将该研究应用于黄河羊曲水电站天然河道的水面线计算，得到了原河道各级流量下的水面线，可供其上、下游水库梯级开发的水能规划部门参考应用。 |
| 关键词: 复杂地形条件 急流均匀流 临界水深 水面线计算 |
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| 基金项目:国家自然科学基金重点项目(40335050)；2009高等学校博士学科点专项科研基金项目（20090204110019）；西北农林科技大学留学归国人员科研基金项目（01140507）；西北农林科技大学科研专项基金项目（A213020503） |
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| Study on natural river water surface calculation under complex terrain conditions |
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| Abstract: |
| 【Objective】For complex terrain conditions,a calculation method is provided to solve the interruption of natural river water surface.【Method】By using Predictor-Corrector Method,based on the application of one-dimensional deformation of riverbed erosion and deposition calculation model,an increase of a formula to solve the river-slope,down slope turns,sudden expansion,sudden contraction frequent complex terrain conditions was added to determine the uniform flow depth and critical depth,the discontinuities of the water-line calculation of the problem was realized.The method was validated in Yang Qu Hydropower station in the Yellow River.【Result】A natural water line calculation model under complex terrain is established and the instance is validated by the model.The results showed that the model calculations of the water line is closer to the measurement of the water line,satistying precision requirements of the engineering design.【Conclusion】The research was applied to solve the natural water line of Yang Qu Hydropower Station on Yellow River.The discharge of the natural original river water lines at all levels was obtained,which could be used for a reference applications by its upstream and downstream reservoirs of hydropower cascade development planning departments. |
| Key words: complex terrain condition jet-uniform flow critical depth water surface calculation |
