【摘要】 依据大量的实测资料,详细分析了长江中下游近50年来的洪水位变化与河床冲淤及其分布关系,发现部分水文断面洪水位抬升明显、高洪水位持续时间加长的现象,与河段河床演变及河道形态变化以及沿江湖泊的淤积密切相关,并阐述了二者的理论关系,为长江中下游洪水抬升机理分析提供了重要的依据.更多还原

【Abstract】 Based on a large number of field data, the flood level and bed level variation at the middle and lower reaches of the Yangtze River in the last 50 years, has been analyzed. It has been found that there is nearly relationship between the river and lake beds variation and the phenomenon of flood level going up distinctly and keeping long time. And the theoretical relationship has been analyzed in detail so as to offer an important basis to analyze influential factors on higher flood level.更多还原