摘要
莱州湾东岸发育有分形特征典型的小尺度河流,受区域内陆海相互作用影响显著。基于前人对莱州湾东岸的研究以定性描述为主,而缺乏定量分析这一现状,以莱州湾东岸3条典型河流为例,采用分形分析和GIS技术相结合的方法,对区域内流域地貌特征进行了定量分析。结果表明,分形分析同样适用于研究小尺度河流,可很好地揭示区域内陆海相互作用特征及流域地貌所处的发育阶段。基于分形方法所反映的流域地貌特征与数字高程模型所提取的流域地貌信息较吻合,最终结果能较客观地反映出流域地貌的发育特征。
There are several small-scale rivers with typical fractal features in the eastern coast of Laizhou Bay.The fluvial landform character are deeply influenced by regional land-ocean interaction.Most previous researches on Laizhou Bay focused on the southern coast,mainly including landform descriptions,saltwater intrusion,coastal erosion,sedimentary environment and dynamics and so on.There were few quantitative studies on fluvial landform of the eastern coast.Besides,the fractal features of large-scale rivers have been well-studied,but not the small-scale rivers.In this study,based on the contour data of the eastern coast of Laizhou Bay in 1969 （because there are few anthropic activities at that time）,the fluvial landform features are quantitatively analyzed by applying fractal methods,including Overlay Method and Horton＇s Law,and GIS technology to three typical smallscale rivers （the Huangshuihe River,the Wanghe River and the Jiehe River） in the region.On the basis of Overlay Method＇s results and He＇s standard of classification of fluvial landform,the fluvial landform in the eastern coast of Laizhou Bay is on the primary stage,not well-developed;and the river channel fractal dimension data of the Wanghe River is the largest,which demonstrates that its evolution is deeply influenced by historical migration of the river channel.According to Horton＇s Law,the fractal dimension data show that the evolution of rivers in the eastern coast of Laizhou Bay are natural and normal,and are influenced by the intensity of tectonic movements and the number of fault zones in this region or adjacent area.The fractal dimension data of the Jiehe River is the smallest,because there are only a few fault zones in its drainage area and it is less influenced by the famous Tancheng-Lujiang Fault Zone.Compared with our field work,the fractal methods can better reveal the fluvial landform features of the eastern coast of Laizhou Bay,and both the fractal dimension data and regional Digital Elevation Model （DEM） information a
出处
《地理科学》
CSCD
北大核心
2010年第5期755-759,共5页
Scientia Geographica Sinica
基金
国家自然科学基金项目(40271004)外延成果
山东省自然科学基金重大项目(Z2003E01)
鲁东大学校基金重点项目(20053202)资助
关键词
莱州湾东岸
小尺度河流
分形方法
数字高程模型
流域地貌
eastern coast of Laizhou Bay
small-scale rivers
fractal methods
Digital Elevation Model （DEM）
fluvial landform
