摘要
长江荆江段通过荆江三口与洞庭湖相连。洞庭湖除通过三口接纳长江的水沙以外，还承接本流域湘、资、沅、澧四水的水沙，然后经七里山至城陵矶汇入长江，由此构成了复杂的江湖关系。１９６７～１９７２年下荆江３处裁弯取直工程后，江湖关系发生了变化。根据１９５９～１９９１年的水沙实测资料，对三口的过水量和沙量，洞庭湖的淤积，洞庭湖出口城陵矶至螺山河段的过水面积、水面比降进行了分析，阐述了荆江裁弯取直以后江湖关系的变化。
Jingjiang stretch of Yangtze River connects the Dongting Lake through three branch channels. In addition to taking in sediment laden water of Yangtze River through branch channels, the Dongting Lake also receives sediment laden water of Rivers Xiang, Zi, Yuan and Li in its own basin, and then discharges into Yangtze River at Chenlingji, forming the complex river lake relation. Since three river cut off projects in lower Jingjiang stretch were implemented in 1967～1972, the river lake relation has changed. On the basis of the hydrologic and sediment data measured in 1959～1991, and by analysing the amount of water and sediment passing through the three branch channels, the sedimentation condition of the Dongting Lake, the river cross section and water surface gradient from Chenglingji, the outlet of Dongting Lake, to Luoshan hydrologic station in Yangtze River, the changes of river lake relation are expounded.
出处
《人民长江》
北大核心
1997年第8期6-8,共3页
Yangtze River
关键词
水沙资源
水利工程
环境影响
栽弯取直
Water sand resources Environment impact by hydroproject Cut off of river Hydrologic regime Lake Dongting
