GIS支持下的辽宁省海岸线分形特征研究

Research on Fractal Characteristics of Coastline in Liaoning Province Based on GIS

为加强对辽宁省海岸线分形分维的认识与理解,以2017年辽宁省调查统计岸线为基础数据,采用网格法计算了辽宁省及其沿海6市海岸线的分形维数,对其几何学特征和空间分布规律进行了研究。结果表明:辽宁全省及沿海丹东、大连、营口、盘锦、锦州和葫芦岛6市调查统计岸线具有分形性质,分维遵循分形地貌学中的合并原理,分维值分别为1.143 1、1.108 5、1.163 4、1.116 1、1.110 3、1.105 4和1.101 3。沿岸用海活动改变了原有岸线的自然形态,一定程度上导致辽宁全省及沿海各市海岸线的分维值都有所增加,其中盘锦市、营口市海岸线的分形维数变化最大,大连市海岸线分形维数变化最小。

In order to enhance the cognition and understanding of fractal and fracted dimension along Liaoning coastline,fractal dimension of Liaoning coastline,and six inshore cities in Liaoning Province are calculated through box-counting method based on the survey and statistics data of Liaoning coastline in 2017.Geometrical characters and spatial distribution pattern of Liaoning coastline are analyzed.Results show that the fractal dimensions of Dandong,Dalian,Yingkou,Panjin,Jinzhou and Huludao are 1.1431,1.1085,1.1634,1.1161,1.1103,1.1054,and 1.1013 respectively,consistent with the principle of fractal geomorphology.The ocean exploiting activities along Liaoning coastline have changed the natural form of the original shoreline.Furthermore,the fractal dimension of the coastline of Liaoning Province and six coastal cities has been increased.The increase values of Panjin and Yingkou are the biggest,with Dalian the smallest.