摘要
近 5 0年来长江中下游河道演变分析表明 ,河道演变具有如下特点 :河道总体河势基本稳定 ,局部河势变化较大 ;河道总体冲淤相对平衡 ,部分河段冲淤幅度较大 ;荆江和洞庭湖关系调整幅度加大 ;人为因素未改变河道演变基本规律 ;坐崩是长江中下游岸线崩退和护岸工程崩毁的主要形式 ;
The analysis on fluvial processes of Middle and Lower reaches of Yangtze River in recent fifty years shows that:(1)the river regime of all reaches as a whole is stable,but there are relatively obvious changes in some reaches;(2)the erosion and siltation of all reaches is in a state of relative equilibrium,but variations in some reaches are rather noticeable;(3)the regulating ranges of relation between Jingjiang River and Dongting Lake increased;(4)the regularity of fluvial processes has not been changed under human activities;(5)rotational slip is a major mode of banks failure and river bank protection works;(6)the impact of human activities on the fluvial processes of the Yangtze River estuary is increasing.
出处
《长江科学院院报》
CSCD
北大核心
2001年第5期18-22,共5页
Journal of Changjiang River Scientific Research Institute
