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在大量实测资料的基础上,主要分析长江中游近50年来在自然因素和人为因素共同影响下河道演变特点,认为长江中游河道受自然和人为因素的双重影响,总体河势基本稳定,但局部河势变化较大;荆江和洞庭湖关系的调整幅度加大;河道总体冲淤相对平衡,部分河段冲淤幅度加大;人为因素未改变河道演变基本规律。最后提出河道治理须注意的几个问题,即河势控制工程尽早全面实施;研究制定长江中游洪水河槽堤线规划;加强岸线利用现状观测调查,综合分析各类工程对河道泄洪的影响。
Based on a large amount of measured data, this paper mainly analyzes the characteristics of the river course under the influence of both natural and man-made factors in the middle reaches of the Yangtze River in the past 50 years. He believes that the river course in the middle reaches of the Yangtze River is affected by both natural and human factors and the overall river regime is basically stable. However, The trend of Jingjiang River and Dongting Lake increased. The overall erosion and sedimentation of the river channel was relatively balanced, and the erosion and deposition margin of some river sections increased. The human factor did not change the basic law of river channel evolution. At last, several problems which should be paid attention to in the course of river training should be noticed, that is, the river course control project should be fully implemented as soon as possible. The planning of flood embankment embankment in the middle reaches of the Yangtze River should be studied and developed. The current status of shoreline survey should be strengthened.