摘要
通过目视解译获取了珠海市沿海区域1995、2000和2003年的土地利用数据。利用ArcGIS软件获取了各种土地利用类型的面积变化数据,以及由模型运算得到不同时期研究区的土地利用分维度、分离度、破碎度、多样性等景观指数,对不同时期的土地利用面积变化,以及各景观指数的变化机理进行了分析。结果表明,珠江口西岸的土地利用变化主要表现为耕地面积不断减少,尤其2000年以后减少的更为剧烈;而林地、建设用地、水域的面积相应的有不同程度的增长。土地利用格局的变化,致使景观指数的变化,诸如,2003年的分离度、分维度等都高于前两个时期,而土地利用多样性指数也逐年增长。造成这些变化的主要驱动力有人口的增长,对土地经济效益的追求,政府政策的影响以及海岸带的区位优势等。
The landscape spatial patterns of land use were a long-term result of interaction between human beings and nature. The coastal zone of western Pearl River Estuary,which is one of the hot spots of socio-economic devel- opment in China,was taken as the study area in this paper. The land use maps for 1995,2000 and 2003 were ob- tained by the interpretation of remote sensing images. The changes of land use information were analyzed. The result shows, main changes were that the cultivated land decreased and forest, construction land ,water areas increased to different degrees. Under the support of GIS, the landscape spatial patterns of land use in study area were also quan- titatively analyzed by using landscape indices such as fractal dimension, isolation index, fragmentation index, and diversity index. Result shows that the four landscape indices increased from 1995 to 2003 because of strong human interventions. At last the paper investigated the driving mechanism of the changes and concluded that population growth, pursuing for more economy benefits, effects of government policies, and its location advantages were the four main driving forces.
出处
《地球信息科学》
CSCD
北大核心
2009年第4期436-441,共6页
Geo-information Science
基金
国家"973"项目(2006CB701305)
国家"863"项目(2006AA12Z146)
中国科学院创新课题(kzcx2-yw-304-01)联合资助
关键词
海岸带
土地利用
景观指数
驱动力
coastal zone
land use
landscape index
driving force
