长江南京段岸线资源GIS评价与分析

岸线资源是特殊的国土资源,岸线资源评价是岸线资源研究的主要工作之一。以往的研究仅从自然和经济的角度出发,对于生态条件的考虑鲜有涉及。为了达到经济和生态的双赢,根据长江南京段岸线资源的特点,综合考虑自然、经济和生态因素,构建了岸线前沿水深、岸线稳定性、岸线陆域宽度、岸线集疏运条件、水源保护区、风景名胜区六项指标组成的评价指标体系。选取合理的评价单元,运用GIS空间分析技术和ArcGISEngine开发包,在完成单项指标评价的基础上,依据建立的指标体系对研究区内的岸线资源进行综合评价,以期为长江岸线南京段的合理利用与开发提供参考依据。

GIS-based Waterfront Resources Evaluation of the Yangtze River in Nanjing

Waterfront resource is an important component of land resource in China,and resource evaluation is the major work in waterfront resource studies.In China,the studies began at the end of the 1980s and focused mainly on the lower and middle reaches of the Yangtze River.In those methods,quantitative analysis and GIS tools have been applied.It is impractical to analyze the waterfront resource only according to the natural conditions and economic conditions.In order to gain both socio-economic and ecological benefits,in terms of the characteristic of Nanjing section of the Yangtze River,the factor index in this study is established including waterfront depth,stability of waterfront,water-behind land width,water resources protection areas and scenic resort and historic sites.In accord,the steps of resource evaluation are to cut cells,to evaluate each factor,and to grade waterfront.Applying GIS and ArcGIS Engine exploring tools,this paper implements the integrative evaluation along the Yangtze River in Nanjing,on the basis of which,index of individual evaluation is evaluated and reasonable division of waterfront cells.The evaluation results show that waterfront resource is rich,of which the fine parts take up around half of the overall length;furthermore,the fine parts are very concentrated which are fit to utilization.All the jobs can provide some consultation for scientific and reasonable utilization and exploitation of waterfront resource of the Yangtze River in Nanjing.