Investigation into the Impacts of the Gezhouba and the Three Gorges Reservoirs on the Flow Regime of the Yangtze River
Investigation into the Impacts of the Gezhouba and the Three Gorges Reservoirs on the Flow Regime of the Yangtze River
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DOI：
10.1061/(asce)he.1943-5584.0000545
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发表时间：
2013-09
影响因子：
2.4
通讯作者：
Meixiu Yu;Qiongfang Li;Guobin Lu;Tao Cai;W. Xie;Xue Bai
中科院分区：
文献类型：
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作者：
Meixiu Yu;Qiongfang Li;Guobin Lu;Tao Cai;W. Xie;Xue Bai
摘要近几十年来，人类活动的加剧，特别是三峡工程的修建，使长江的流态发生了不同程度的变化。为了评估大坝建设对长江水流的影响，长江上游两座最大的水库，葛洲坝和三峡水库被选为案例研究地点。为分析坝前坝后水流变化规律，根据水库蓄水年份将整个研究期分为3个子期。本文根据长江中下游四个重点水文站的日流量时间序列，通过对湖北省寸滩、宜昌、汉口、大同等5个典型流域的年、季、月、日流量动态及不同时段的涨水、枯水动态的分析，探讨了这些流域的变化驱动力。结果表明，两水库对下游水流的影响随水库水位的变化而变化。
AbstractThe flow regime of the Yangtze River (Changjiang) has been altered to some extent by intensified human activities over the past decades, particularly dam construction. To assess the impacts of dam building on the flow regime in the Yangtze River, two of the largest reservoirs on the upper reach, i.e., the Gezhouba and Three Gorges reservoirs, have been selected as case study sites. To analyze the changes in flow regime between predam and postdam periods, the whole study period was divided into three subperiods according to the years when these two reservoirs started to store water. On the basis of the time series of daily flow discharge from four key hydrological stations, i.e., Cuntan, Yichang, Hankou, and Datong, the alterations in annual, seasonal, monthly, and daily flow regimes and water rising or falling regime in different subperiods were investigated and the driving forces were explored. The results revealed the impacts of the two reservoirs on their downstream flow regime varied with rese...