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分析了三峡水库蓄水前后50年长江城陵矶—汉口河段年径流量、水沙含量的变化规律,指出三峡水库蓄水以来长江城陵矶-汉口段处于微冲状态。分析结果表明,同流量条件下水位降幅较小,三峡水库调蓄作用导致汛后10、11月城陵矶水位下降,但出流流量基本变化不大;12月～次年3、5月城陵矶站月均水位无明显变化,4、6月有减小趋势。
The variation regularity of annual runoff and water-sediment content in the Chenglingji-Hankou section of the Yangtze River for the past 50 years before and after the impoundment of the Three Gorges Reservoir was analyzed. It is pointed out that since the Three Gorges Reservoir was impacted, the Chenglingji-Hankou section of the Yangtze River is in a micro-impulse state. The results show that the decrease of water level under the same flow conditions is small, and the regulation and storage of the Three Gorges Reservoir led to the decrease of water level at Chenglingji in October and November after flood season, but the change of outflow basically did not change much. From December to March of next year Lingji station monthly average water level no significant change, 4, 6 months to reduce the trend.