摘要
采用土地利用景观格局指数和土地利用转移矩阵的方法,对嘉峪关市土地利用空间格局进行定量分析.结果表明:嘉峪关市未利用土地所占比例过大,2000年和2010年分别为87.65%和86.42%,但随着耕地和住宅用地及工矿用地比例的增加,未利用土地的主导地位逐渐降低;在主要斑块所占景观面积比例增加的前提下,各地类斑块数量减少,斑块密度下降,说明10年间景观破碎度下降,整体趋于完整化;景观多样性指数从2000年的0.555 2增加到2010年的0.587 7,说明土地利用的复杂程度增强,不同景观斑块在景观格局中的空间分布更加均衡化.通过转移矩阵数据处理结构分析,发现嘉峪关市各地类间的相互转化比较频繁,说明土地利用空间格局容易受到人类活动的干扰,故人类活动因素是嘉峪关市土地利用空间格局变化的根本原因.
In view of the adverse natural condition in Jiayuguan city,its weakness of ecological environ-ment,and the scarcity in high quality land resources,this essay carried out on quantitative analysis at the land in Jiayuguan City by two methods,landscape pattern index,and the land use change matrix.The re-search demonstrated that the scale of unused land in 2000 and 2010 were oversized with 87.60% and 86.42%.However,this phenomenon was gradually decline with the increasing of the proportion of arable land,housing land,industrial and mining land.Around the class reduced the number of patches,patch den-sity decreased,indicating that the landscape fragmentation decade decline,tends to complete.Landscape pattern index increased from 0.555 2 to 0.587 7,the complexity of the land use enhanced.The spatial dis-tribution of different landscape patches in the landscape pattern was equalized.Analysis the data processing by the transfen matrix structural found that the mutual conversion between classes was more frequently a-round.The results showed that the spatial pattern of land use was vulnerable to human disturbance,the hu-man activity factors were the root cause of Jiayuguan City land use spatial pattern change.
出处
《甘肃农业大学学报》
CAS
CSCD
北大核心
2013年第6期116-122,130,共8页
Journal of Gansu Agricultural University
基金
国家自然科学地区科学基金项目(71263003)
教育部人文社科研究规划基金项目(07JA630056)
关键词
土地利用
动态变化
景观格局
嘉峪关市
land use
dynamic change
landscape pattern of land use
Jiayuguan City
