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本文以现场调研和多年实测资料为基础,采用理论分析与数学模型计算相结合的方法,对长江中游周天河段的河床演变及趋势进行了分析和预测。结果表明:周天河段为顺直微弯河段,河道演变符合顺直型河流演变的规律;过渡段主流摆动频繁、滩槽冲淤多变是河床演变的主要特点;三峡水库蓄水后,周天河段河势格局整体较为稳定,但局部滩槽变化范围仍较大;后续应加强观测,并尽早实施航道整治工程。
Based on the field investigation and many years of measured data, this paper analyzes and predicts the evolution and trend of the riverbed in the Zhoutian section of the middle reaches of the Yangtze River using the method of theoretical analysis and mathematical model calculation. The results show that the Zhoutian section is straight and slightly curved, and the evolution of the river course accords with the regularity of the straight river. The main stream of the transition section is swirling frequently, and the ebb and flow changes are the main characteristics of the river bed evolution. After the Three Gorges Reservoir is impounded, The overall pattern of river sections is relatively stable, but the range of partial troughs is still relatively large. Observation should be strengthened in the follow-up and the waterway regulation should be implemented as soon as possible.