三峡水库蓄水期洞庭湖水力要素变化初步分析.pdf

第33 卷 第2 期 水 力 发 电 学 报 Vol.33 No.2 2014 年4 月 JOURNAL OF HYDROELECTRIC ENGINEERING Apr., 2014 （武汉大学水资源与水电工程科学国家重点实验室，武汉 430072 ） 为了研究长江-洞庭湖关系对三峡水库径流调蓄作用的响应，本研究基于近期数据，对三峡水库蓄水期 长江干流及洞庭湖水力要素进行比较研究。结果表明：长江入湖流量和出口顶托关系是影响洞庭湖调蓄过程的主 要因素；三峡水库蓄水后，受蓄水影响三口 10 月流量减少，11 月变化不大，城陵矶 10、11 月份水位略有降低， 而流量有增加趋势；通过类比分析法提出了洞庭湖水量平衡时的临界水位，建立了该临界水位和入湖流量及监利 流量量化关系，可量化洞庭湖水量受三峡水库调蓄作用的影响程度。 洞庭湖；调蓄水量；城陵矶水位；三峡水库 TV697.1+ 1 A Preliminary analysis of changes in hydraulic elements of Dongting lake in storage period of Three Gorges reservoir WANG Dong, LI Yitian, DENG Jinyun, YANG Yunping (Wuhan University ，State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan 430072) Abstract ： The hydraulic elements of the Yangtze River and the Dongting lake are analyzed for the storage period of the Three Gorges reservoir based on the recent data to study the responses of the Yangtze-Dongting relationship to the reservoirs behaviors in flow regulation and retardation. The results show that the lake inflow and the rivers pushing to the lakes outflow are two key factors that have caused flow regulation and retardation in the lake. After the reservoirs impoundment, the average flows at the three diversion outlets were decreasing in October but changed little in November, while the flow at Chenglingji was increasing in these two months and the corresponding water level was dropping. By using analogy analysis, a threshold water level was determined for the water balance condition of the Dongting and a quantitative relationship of this threshold versus the lake inflow and the river flow at Jianli was established. This work would provide a qu