| 梯级电站水温累积影响研究 |
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| 引用本文： | 邓云,李嘉,李克锋,李然.梯级电站水温累积影响研究[J].水科学进展,2008,19(2):273-279. |
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| 作者姓名： | 邓云 李嘉 李克锋 李然 |
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| 作者单位： | 四川大学水力学与山区河流开发保护国家重点实验室, 四川, 成都, 610065 |
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| 基金项目： | 国家自然科学基金
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三峡建设委员会重点项目联合资助项目
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国家自然科学基金委员会和二滩水电开发有限责任公司雅砻江水电开发联合研究基金 |
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| 摘 要： | 采用数学模型进行梯级电站的水温累积影响研究,预测了雅砻江锦屏一级和二滩两个梯级电站联合运行时的库区水温分布及下泄水温过程,并与二滩电站单独运行时的水温进行比较。结果显示,锦屏一级水库全年稳定分层,库底保持稳定低温8.6℃,坝前表层水温在12.7~24.2℃内变化,下泄水温明显延迟。二滩库区在单独运行和联合运行时均稳定分层,但联合运行较单独运行时库表水温降低,库底水温升高,水温分层有所减弱,而下泄水温过程的延迟和均化现象进一步加强,梯级电站的累积生态环境效应显著。
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| 关 键 词： | 水温 梯级电站 累积影响 数学模型 温度分层 |
| 文章编号： | 1001-6791(2008)02-0273-07 |
| 收稿时间： | 2007-05-14 |
| 修稿时间： | 2007年5月14日 |
Cumulative impact of cascade power stations on water temperature |
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| DENG Yun,LI Jia,LI Ke-feng,LI Ran.Cumulative impact of cascade power stations on water temperature[J].Advances in Water Science,2008,19(2):273-279. |
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| Authors: | DENG Yun LI Jia LI Ke-feng LI Ran |
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| Institution: | State Key Lab. of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China |
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| Abstract: | The cumulative impacts of the cascade power stations on water temperature are studied by using the mathematic model.The water temperatue of Jinping and Ertan in reservoir area and the outflow temperature are computed.Comparison is carried out between the joint operation and single operation of Ertan.The results show Jinping reservoir is steadily thermal-stratified in the year round.The temperature at bed keeps cold steadily at 8.6℃.The temperature on the surface near dam varies from 12.7～24.2℃ in the year round.The course of the outflow temperature is obviously delayed.Ertan reservoir is thermally stratified both at the single operation and joint operation conditions.But compared with the single operation condition,the surface temperature declines and the bed temperature rises at the joint cooperation condition.The stratification in reservoir area is weakened.The delay and evenness of the outflow temperature course is further strengthened.The cumulative impact of the cascade power station on ecology environment is obvious. |
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