摘要
以信息熵和分形理论为指导,在遥感和GIS技术支持下构建绿地空间结构熵模型,以番禺区为例对广州市边缘区绿地结构在空间上的分异进行分析,结果表明:III梯度区得益于良好的水资源及地形等自然条件,斑块平均面积最大、边缘密度最低、斑块结合度指数最高,生境破碎化程度最小,熵值最高,为-12524,稳定性最好;II梯度区熵值最低,为-62553,主要由于受游移多变且支流众多的水系胁迫导致绿地空间结构被切割破碎,稳定性最差;而I梯度区熵值为-36819,处于II、III梯度区之间,但由于距城市最近受人为干扰最强烈,连通性最差、生境破碎化程度最高,其稳定性很大程度取决于人为干扰活动的剧烈程度和政府行为对用地结构的调控。
Based on fractal theory and information entropy,the landscape entropy model is constructed with the help of the tech-niques of RS and GIS to analyze the spatial disparity of Greenland pattern structures taking Panyu district as a case study.The results show that the value of landscape entropy varies greatly in three gradients.III gradient has a high entropy（-12 524）,average patch area,contagion index,low edge density,and the best stability benefiting from sound natural conditions including water resources and ter-rain.II gradient has a low entropy（-62 553）,which reveals due to the coerce in vacillating river,the stability is the worst.Value of entropy in I gradient is-36 819 which is between II and III,but the impacts of human activity lead to worse connectedness and high fragmentation,its stability depends on the intensity of human disturbance and the adjustment of land use structure from government behavior.
出处
《生态环境学报》
CSCD
北大核心
2010年第7期1593-1598,共6页
Ecology and Environmental Sciences
基金
国家自然科学基金项目(40801236)
广东省自然科学基金项目(7300652)
关键词
空间结构
绿地
信息熵
分形理论
番禺区
spatial structure
greenland
information entropy
fractal
Panyu district
