秦皇岛市海水入侵灾害评价及防治对策

自20世纪80年代初秦皇岛市沿海出现海水入侵以来,入侵面积逐年增加,已发展成为海岸带主要地质灾害之一。论文在海水入侵灾害勘查、监测成果的基础上,详细阐述了该区海水入侵现状、分布特征、演化过程和入侵方式。探讨了海水入侵的机理,指出人类活动是海水入侵的诱发因素,超采地下水是海水入侵的根本原因。应用基于GIS的层次分析法进行了危险性评价,从地学角度,提出了综合防治对策。

Assessment and control countermeasures of seawater intrusion hazard on Qinghuangdao Region

Qinhuangdao region is a more serious seawater intrusion area in the north China. From the beginning of 80＇ s in last century when the seawater intrusion appeared, the intrusion areas is increasing year by year, by 2004 it has reached 341.74km2 ,and it is one restrict factor to the social and economic development. This paper is based on seawater reconnaissance and monitoring production, expatiates the present situation of seawater intrusion, distributing character, evolvement process and intrusion fashion, discusses the mechanism of seawater intrusion, points out that human＇ s activity induced seawater intrusion, underground water＇s excessive exploiting is the fundamental reason for seawater intrusion. The risk assessment is based on GIS AHP analysis method, and puts forward the control countermeasures from the point of geologic views.