基于GIS的巩义市农村居民点景观格局时空演变研究

Studies on landscape pattern changes of rural residential areas in Gongyi based on GIS

基于GIS技术和景观格局分析方法,研究了1990和2008年巩义市农村居民点景观格局特点与时空演变.结果表明,农村居民点变化表现出了面积增加、密度增大、形状更加规则等特点.进而研究了地貌类型、经济发展水平、道路距离和人口密度对农村居民点增长率、形状指数变化率、密度变化率三类指标的影响.中低山区农村居民点规模增长率最快,丘陵区农村居民点的形状指数下降最快,山区农村居民点密度增长最快.经济水平越发达,农村居民点规模增长速度越慢,但形状指数下降越快.到310国道的距离与农村居民点规模增长率呈负相关,与形状指数下降速度和密度呈正相关.人口中密度区居民点规模增长率、平均形状指数下降幅度和密度增长率均最快.

With the data of 1990 and 2008,landscape pattern changes of rural residential areas were studied in Gongyi based on GIS and the method for analyzing landscape pattern.The results show that the changes in rural residential areas can be seen in terms of the scale of growth,density increase and regular shape.The features,size,shape index and density of the rural residential areasanel temporal-spatial evolution were studied on different landforms,levels of economic development,traffic conditions and levels of population density.The area growth rate of the rural residential areas is fastest in mid-low mountains.The reduction rate of the figure index of rural residential areas is fastest in hilly region.The density growth rate is fastest in the mountainous regions.The faster social economy develops,the slower the area growth rate becomes and the faster the reduction rate of the figure index becomes.The nearer to G310 road,the slower the area growth rate will be and the faster the reduction rate of the figure index,as well as the density growth rate.The area growth rate,the reduction rate of the figure index and the density growth rate are fastest in the mid-leveled population density areas.