【摘要】 利用多时段的航卫片和最新的TM/ETM+图像,采用目视解译和微机图像处理相结合的方法,辅以历史资料分析,对江西长江河道的演变特征进行了详细研究。基本查清了近代江西长江河道的发展演变历程,自清代以来未发生重大的变迁事件,但也处于不断演变中,其演变主要表现在河道的冲淤作用,即岸线的冲刷侧蚀后退和边滩的淤胀,江心洲、心滩、浅滩的增生淤胀、消亡和移动,河道的淤塞等。为研究洪涝灾害生成背景、致灾作用以及防灾治灾提供科学依据。更多还原

【Abstract】 Through of use airphotoes and satellite pictures of multi|time and multi|wave bands and the newest TM+ETM photograph,this paper detailed studied the evolutionary characteristics of the Yangtze River course in Jiangxi section according to take the methods with eye|sighting explanation and picture disposal technique in computer,as well as analyse the historical data.The evolutionarg process of the Yangtze River channel in Jiangxi Province has been known basically,include of the important transitional events since the Qing Dynasty.But it has been evolving which shows mainly sapping and depositing of the trunk stream,that is,the riverbank line is scoured and lateral erosived and recessived,the side shoal is silted and inflated,the continent and the shoal in the center of river and the shoal patch are increase|silted and inflated and died out and floated, and the river bed is fouled, etc.It provides science evidence for studying the genetic background of waterlogging hazards and the damage causing,as well as preventing and governing disaster.更多还原