秦皇岛市海岸线侵淤变化规律研究

A Study on the Change Regularity of the Coastal Erosion and Deposit in Qinhuangdao City

海岸蚀退和港口淤积是当今世界各国港口城市迫切关注和急待解决的问题；秦皇岛市是我国环渤海经济区的重要港口城市。本文应用遥感手段，首次创新性地借助地理信息系统（ＧＩＳ）的支持，利用计算机图形图像处理与拟合技术对秦皇岛海岸侵淤时空演变进行定量评价；在此基础上，对其变化规律与影响因素进行了分析研究。最后认为：秦皇岛市现代海岸线总体呈蚀退形式；陆源物质入海量减少、海动力作用及沿岸工程建筑等是其海岸蚀退的主要影响因素。

oastal erosion and harbour deposit are the problems which are urgent to every harbour city in the world of today; Qinhuangdao city is a important harbour city of the economic zone round Bobal sea in China. This paper, through the use of computer processing and fitting techniques of image with the aid of geographic information system(GIS) for the first time, carries out a quantitative assessment on the space-time evolution of the coastal erosion and deposit in Qinhuangdao city by remote-sensing method; and analyses the change regularity and its influence factors. Finally, the authors consider that coastal erosion is the main trend on the modern coast-line of Qinhuangdao city jibe decrease of terrigenous material discharge,marine dynamic process and engineering structure along the coast are the main causes of the coastal erosion.