摘要
文章以分形理论为基础,在RS和GIS的技术支持下,对近30年来鄱阳湖湖泊岸线的动态变化特征进行定量分析。研究结果表明1975-2010年鄱阳湖湖泊岸线长度缩短,几何形态趋于简单,湖泊形态变得较为规则,不稳定性有所增加。在1975-1995年间湖泊面积显著减小,1995-2010年间面积减小速率有所下降,但岸线长度、岸线发育系数与计盒维数减小幅度明显增加,反映出这一时期人类经济活动对湖泊岸线的干扰程度加大。
Based on fractal theory, the shoreline morphology change of Poyang Lake is analyzed quantitatively with the technology of RS and GIS in recent 30 years. The results indicate that during 1975 and 2010, the length of Poyang Lake＇s shoreline has become shorter and the geometry form was simpler. Besides, the lake shape was more regular and unstable. During 1975 and 1995, the area of Poyang Lake reduced significantly, while during 1995 and 2010, the rate of area reduction has declined. However, the decrease extent of shoreline length、SDI and SBD increased obviously between 1995 and 2010, which indicated that the shoreline was disturbed seriously by human economical activity in this period.
出处
《江苏科技信息》
2015年第5期76-78,共3页
Jiangsu Science and Technology Information
关键词
鄱阳湖
岸线形态
分形
poyang lake
shoreline morphology
fractal
