| 摘要: |
| 在模型比尺为1∶100的正态物理模型基础上,对考虑橄榄坝修建前后澜沧江景洪水电站8个日调节工况方案进行了模拟,通过在坝址下游约6.4 km河段内影响通航水流条件的关键河段布设测站,实测非恒定流水流特征参数,分析影响船舶安全航行和靠泊的重要非恒定流特征参数,研究景洪水电站各个日调节工况对坝址下游近坝河段通航水流条件的影响.研究结果表明,电站运行工况的流量最大日变幅以及小时变幅是影响下游水位变化特征参数的重要因素,所有工况下景洪水电站下游河段水位日最大变幅、小时最大变幅及20分钟最大变幅均呈沿程递减的趋势. |
| 关键词: 日调节非恒定流 反调节水库 物理模型 通航水流条件 |
| DOI： |
| 分类号:U697 |
| 基金项目: |
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| Influence of daily regulation schemes of Jinghong hydropower station on downstream navigation flow conditions |
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LIU Ya-hui,WANG Yun-li
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(Chongqing Southwest Water Transport Engineering Research Institute,Chongqing Jiaotong University,Chongqing 400016,China)
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| Abstract: |
| Based on the normal model with the model scale of 1∶100,and considering 8 daily regulation schemes in the cases before and after the construction of the Ganlanba hydropower station,unsteady flows of the Jinghong hydropower station have been simulated.By laying out the measurement stations at the key places controlling the navigation in the 6.4 km long downstream reach of the Jinghong hydropower station,the characteristic parameters of the unsteady flow have been measured and analyzed.The characteristic parameter values such as the maximum daily,hourly and 20 minites’ variation amplitudes of water level have an important influence on navigation and mooring.As a result,this paper has studied the influence of 8 daily regulation schemes of Jinghong hydropower station on the downstream navigation flow conditions.The model test results show that the maximum daily and hourly variation amplitudes of discharge of the regulation schemes are two key factors which have an important role in characteristic parameters of the unsteady flow,and in all cases of the regulation schemes the maximum daily,hourly,and 20 minites’ variation amplitudes of water level decrease gradually in the downstream of the Jinghong hydropower station.The model test results have provided reference for rationally drawing up the daily regulation scheme of Jinghong hydropower station. |
| Key words: unsteady flow of daily regulation reservoir of reverse regulation physical model test navigation flow condition |
