长江口南北港泥沙冲淤定量分析及河道演变

Calculation of the amount of siltation and erosion in the South and North channel in the Changjiang estuary and its evolution

作者收集了自 184 2至 1997年多幅不同年代的长江口南北港地区海图资料 ,利用地理信息系统 (GIS)和数字化仪进行处理 ,并考虑不同基准面的换算关系 ,建立不同时期的长江口南北港水下数字高程模型 (DEM) ,以此作为基础资料 ,计算了南北港河槽容积 ,分析了南、北港河槽容积与分汊口演变的互动关系 。

The digital elevation model of the South and North channel in the Changjiang estuany is established through analyzing lots of Charts of Changjiang estuany from 1842 to 1997 by using the Kriging gridding method and the transfer relations among different datum planes.Then,the relation between its channel-fill volume and the evolution of its bifurcation was analyzed.The evolution process of the South and North Channel was summarized.