三峡水库2003年蓄水对长江中下游水情影响分析

Influence of TGP reservoir filling in 2003 on the water regime of middle and lower reach of Yangtze river

三峡工程经过近10a的建设于2003年6月上旬蓄水至135m,工程进入围堰发电运行期,10月由于航运月5日。11月6日以后由于三峡水库坝前水位基本维持在11月份的蓄水对长江中游来水影响不大。等方面的需要,水库第2次蓄水至139m。水库蓄水减少了上游来水,使中下游的水情发生了相应的变化,其变139.0m,对中下游来水没有影响,长江中下游各站12月份的来化也引起了社会各界的关心。根据三峡水库的蓄水情况,对2003年三峡水库蓄水期间长江中下游主要站螺3 三峡水库蓄水对长江中下游水情的影响水与天然情况相当,基本不受三峡工程调节的影响。山、汉口、大通站水位、流量进行研究,分析三峡水库蓄水对长江中下游水情的影响。表3 2003年三峡水库蓄水对中游各站水位影响m为分析三峡水库蓄水的影响。

Through 10 years of construction, the Three Gorges Project started impoundment in the first ten-days of June in 2003 to 135 m water level, entering power generation period with cofferdam in use. Due to the requirement of navigation, the secondary impoundment of the reservoir reached to 139 m water level in October. The impoundment of the reservoir reduced the flow in the middle and downstream channel of the Yangtze river and made the water regime of the middle and downstream channel changed and the change aroused the attention of all circles. According to the impoundment of the TGP reservoir, the analysis of water level, discharge of the main hydrological stations of Luoshan, Hankou, Datong on the middle and lower reach of the Yangtze river in the period of impoundment as well as the impact of TGP reservoir impoundment on the water regime of the middle and downstream reach of the Yangtze river are carried out.