基于遥感的郑州市农用地变化及驱动力分析

Analysis of Transformation and Driving Forces of Agricultural Land in Zhengzhou Based on RS

随着经济水平的提高和产业结构的调整,郑州市的土地资源利用方式发生了显著变化,对其进行研究具有重要的现实意义。在地理信息系统(GIS)和遥感(RS)技术支持下,对郑州市1988年和2009年的TM传感器数据进行监督分类,分析了该市的土地利用情况,重点评价了农用地的变化情况及驱动力因素。结果表明,研究期内郑州市的城镇建筑用地与交通运输用地面积大幅度增加,增加率分别为183.40%和123.39%;同时农用地大量减少,减少率为4.11%,郑州市的城市化进程明显。通过对郑州市不同区域的农用地分析,计算了各区域的农用地利用相关系数,发现郑州市区的农用地面积减少量最大,达到159.01km2。研究认为,影响农用地时空变化的驱动力因素以社会因素为主,包括政策因素、人口因素和经济因素。

The use patterns of land resources had significant changes with the development ofeconomy and the adjustment of industrial structure in Zhengzhou.Land use changes in the past 20 years was analyzed by using TM data of Zhengzhou in 1988 and 2009,focusing on the changes of agricultural land and the driving forces.The results showed that in the study period,the area of urban construction land and transportation land had a substantial increase,with the increase rates of 183.40% and 123.39%,while the agricultural land had a significant decrease with the decrease rate of 4.11%,indicating that the urbanization of Zhengzhou was visible.The correlation coefficient of agricultural land utilization in every region was calculated by analyzing of agricultural land in di-fferent regions of Zhengzhou,and it was found that the area of agricultural land in Zhengzhou city had the highest decrement,up to 159.01 km2.It was suggested that the social factors were the main driving force of agricultural land changes,including policy factors,demographic factors and economic factors.