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根据洞庭湖出口控制站城陵矶站１９５６～１９９８ 年实测断面和流量等资料， 分析该站水文断面年内及年际冲淤变化规律， 并运用水位流量关系单值化技术， 分析该站水位流量关系历年的变化。分析表明， 城陵矶站河道断面年内冲淤变化渐趋稳定， 年际冲淤变化呈淤积状态， 从１９８８ 年起出现冲刷趋势； 其水位流量关系历年变化， 同水位下泄洪能力高、中、低水均呈减小趋势， 同流量下水位低、中水均有不同程度的抬高， 高水变化趋小。本成果可供洞庭湖综合治理、三峡工程运行调度和长江中下游防洪规划等参考
According to the measured sections and flow data of Chenglingji Station of Dongting Lake Exit Control Station from 1956 to 1998, the variation law of erosion and silting in the hydrological section of this station during and after the year was analyzed. With the application of the single value technique of water level flow rate, Relationship changes over the years. The analysis shows that the scouring and silting changes in the Chenglingji Station section gradually become stable during the year, and the scouring and silting changes in the interannual period are in a siltation state. The scouring trend has been observed since 1988; the relationship between the water level and discharge has changed over the years, Low water showed a decreasing trend, with low water level under the same flow, both of which had elevation in different degrees and small changes in high water. The results are available for comprehensive management of Dongting Lake, the Three Gorges Project operation scheduling and flood control planning in the middle and lower reaches of the Yangtze River