基于DEM的龙口市土地利用空间格局与时空变化研究

本文以龙口市为例,在ARCG IS软件的支持下,分别从高程、坡度与坡向三个方面,对研究区内的耕地、园地、林地和建设用地四种土地利用类型,进行了空间格局与时空变化研究。研究结果表明:从1989年到2005年的17年间,耕地总数在减少,但其分布仍主要集中于低地形等级上。园地的面积增加较多,空间分布上,有向地形高等级发展的趋势,说明园地对各地形因子的适应性较强。林地主要分布于高海拔,大坡度的区域,这有利于防止水土流失。建设用地基本上不受地形的限制,其分布主要是人类活动的结果,因此它在各地形等级的变化表现不明显。通过对土地利用空间格局指标及参数特征的定量分析,将有助于优化该区土地利用结构,实现不同地形上土地利用类型的合理布局,促进区域持续发展。

Analysis of the land use spatial pattern and spatio-temporal changes in the area of Longkou based on DEM

Taking Longkou city for example,from the factors of elevation,slope and slope aspect,the authors study the spatial pattern and spatio-temporal changes of four typical land use classes,which are cultivated land,garden plot,woodland and construction sites.The research shows that from 1989 to 2005,the total area of cultivated land is reducing,but its distribution is mainly in the low level terrain.The area of garden plot increase considerably and its spatial distribution has the trend to spread to higher terrain,which shows that garden plot has strong adaptability to all terrain factors.Woodland mainly distributes in the area of large regional and slope,which helps to control soil erosion.The construction sites are on the whole not restricted by terrain and its distribution is mainly the result of human activity,so its change is not obviously on terrain levels.Quantitative analyses of the index and the parameters of land use spatial pattern will help to optimize the structure of land use,achieve the rational distribution of land use on different terrain and promote regional sustainable development.