海口市东海岸带土地利用变化强度及其尺度效应研究  

Research on Change Degree and Scale Effect of Land Use in Eastern Coastal Zone of Haikou City

作　　者：刘朝海 李正会[1] 王德智[2] 

机构地区：[1]云南省航测遥感信息院,云南昆明650034 [2]昆明理工大学国土资源工程学院,云南昆明650093

出　　处：《江西农业学报》2015年第12期110-115,共6页Acta Agriculturae Jiangxi

摘　　要：以海口市东海岸带1991年TM、2010年ALOS遥感影像为数据源,在深入分析土地利用转移矩阵的基础上,提出了基于自然生态影响的土地利用变化强度指数,对研究区不同大小规则格网划分下的土地利用变化强度进行了空间自相关和插值,并对空间分布特征进行了研究。得出以下结论：（1）随着尺度增加,土地利用变化强度值变化范围减小,变异性减弱,但平均值变化较小,数据值均近似符合正态分布。（2）当尺度变大时,由于土地利用斑块的聚合作用和区划效应,土地利用变化强度的空间分布均匀性增加,在较远的距离上呈现空间自相关,同时随机因素的作用逐渐增强,全局空间自相关性表现出逐渐减弱的趋势。（3）格网单元越小,呈现的土地利用变化信息越详细,但全局信息特征被掩盖;格网单元越大,总体特征越明显,但数据局部信息被弱化,从而导致部分原始数据信息遗失。（4）以TM/ALOS为数据源时500 m格网为最适宜分析尺度,1991～2010年研究区土地偏离自然生态方向、强烈变化以上区域占总面积的20.70%;趋向自然生态方向、强烈变化以上区域占总面积的2.48%;轻微变化所占比例最大。土地利用变化强度的尺度效应与经济、人口的有一定差异。Taking TM （ 1991 ） and ALOS （2010） remote sensing images of eastern coastal zone of Haikou city as data sources, based on the deep analysis of transfer matrix of land use, we proposed the change degree index of land use based on the natural eco- logical impact, carried out the spatial auto-correlation and interpolation studies on the land use change degree of the studied region which was divided into different sizes of regular grids, and researched their spatial distribution characteristics. The following conclu- sions were obtained ： （ 1 ） As the land scale increased, the value range and variability of land use change degree reduced, but its mean value changed little, and all sample data approximately accorded with the normal distribution. （2） When the land scale be- came larger, due to the effects of aggregation and zoning of land use patches, the spatial distribution evenness of land use change de- gree increased, showing a spatial auto-correlation in far distance ; the role of random factors gradually increased, but the global spa- tial auto-correlation exhibited a waning trend. （3） The smaller the grid cell was, the more detailedly the land use change informa- tion was presented, but the global information features were concealed; the larger the grid cell was, the more obviously the overall characteristics were displayed, but the local information data were weakened, causing the loss of part of original data information. （4） When TM/ALOS was used as data sources, the optimum analytical size of grids was 500 m. From 1991 to 2010, the area of land whose use deviated from the natural ecological direction and had strong variations accounted for 20.70% of the total area in the studied region; the region tending to the natural ecological direction with strong variations accounted for only 2.48% of the total are- a; the proportion of land use with insignificant change was the largest. The scale effect of land use change degree was different from that of economy and population.

关 键 词：海口市 海岸带 土地利用变化 尺度 克里金插值 

分 类 号：S17[农业科学—农业基础科学] P91[天文地球—自然地理学]