苏北废黄河三角洲海岸侵蚀脆弱性评估  

Vulnerability assessment of coastal erosion along the Abandoned Yellow River Delta of northern Jiangsu, China

作　　者：刘小喜[1] 陈沈良[1] 蒋超[1] 胡进[1] 张林[1] 

机构地区：[1]华东师范大学河口海岸学国家重点实验室,上海200062

出　　处：《地理学报》2014年第5期607-618,共12页Acta Geographica Sinica

基　　金：全球变化研究重大科学研究计划(2010CB951202);河口海岸学国家重点实验室自主课题经费(SKLEC2012KYYW06)~~

摘　　要：随着全球气候变化、海平面上升、人类活动加剧以及巨量泥沙来源断绝的影响,苏北废黄河三角洲海岸正面临前所未有的侵蚀灾害风险。本文基于研究区特点和脆弱性指数法(CVI),选取岸线变化速率、等深线变化速率、岸滩坡度、水下坡度、沉积动力环境、年平均含沙量、年平均高潮位、海岸利用类型、海岸开发适宜性等9个评估指标,采用层次分析法(AHP)确定各评估指标权重,结合遥感(RS)和地理信息系统(GIS)技术对废黄河三角洲海岸侵蚀脆弱性进行评估。结果表明废黄河三角洲整体表现为较高的侵蚀脆弱性,其中较高以上脆弱性超过50%,中度以上脆弱性超过75%。评估得出的海岸侵蚀脆弱性分布可为海岸带资源保护、防灾减灾、规划管理等提供重要的参考。The Abandoned Yellow River Delta of northern Jiangsu faces serious erosion hazard due to global climate change, sea-level rise, human activities and shortage of sediments. In this present work, coastal erosion hazard and vulnerability level along the Abandoned Yellow River Delta have been assessed with the aid of RS and GIS. The coastal vulnerability index （CVI） is used to map the relative vulnerability in the study area. Shoreline change rate, depth contours change rate, coastal slope, subaqueous slope, sedimentary dynamic environment, suspended sediment concentration, mean high tidal height, utilization of coastal types and coastal development suitability are used as the evaluation indexes to assess the coastal erosion hazard and vulnerability level. Analytic hierarchy process （AHP） is used to calculate the weights of each evaluation index. The results show that the Abandoned Yellow River Delta presents a high coastal erosion vulnerability level. The vulnerability level indicates that over 50% of the study area presents a high and very high vulnerable level, and over 75% of coastal area presents above the moderate vulnerable level. The coastal erosion vulnerability map prepared from this study can provide reference for the coastal zone protection, disaster prevention and mitigation, proper planning and management of this coastal region.

关 键 词：海岸侵蚀 脆弱性指标 脆弱性评估 废黄河三角洲 

分 类 号：P737.1[天文地球—海洋地质]