郑州市域不同地形位上城乡景观格局动态变化

Dynamic changes of urban-rural landscape spatial pattern in different topographic features in Zhengzhou City

以郑州市域为研究范围,通过Arc GIS 10.2和ENVI 5.0等遥感软件,对1992、2000、2004、2009和2013年的Landsat TM遥感影像和DEM高程影像进行解译,获取郑州市域城乡景观空间分布和地形高程数字化信息,并通过GIS空间分析和Fragstats 4.2软件,分析过去20年间郑州市域城乡景观格局在不同地形区位上的时空演变特征。结果表明,平原黄泛沙区（海拔6.0-135.2 m）和丘陵黄土沟壑区（海拔135.2-315.4 m）分别占研究区域总面积的50%和24%,是城市、农田和水体空间的主要分布区域,也是人类活动的主要集聚区;浅山区（海拔315.4-495.6 m）和深山区（海拔495.6-1 459 m）分别占研究区域总面积的19%和7%,是绿地空间的主要分布区,也是风景名胜区集聚区和生态环境保护的重要区域。

In this study,we focused on the dynamic changes of urban-rural landscape pattern of Zhengzhou in different topographic gradients. Five multi-spectral Landsat TM images（ 1992,2000,2004,2009,2013） and three DEM images were used to get the information of landscape pattern and topographic characteristics using the remote sensing software of Arc GIS 10. 2 and ENVI 5. 0. Fragstats4. 2 was also used to calculate the landscape metrics. The results indicated that urban space,agricultural space and water space were mainly located in the plains regions and hilly regions,and green space was mainly concentrated in the low and high mountain regions. In the high mountain regions,there were less human disturbance and stabilized landscape patterns,while it was opposite in the other three regions. Especially in the plain regions,there were the highest urbanization levels,dramatic landscape changes and fragmented landscape pattern. And due to the similar site condition of built-up land and agricultural land,a mass of good agricultural lands were occupied by the urban space in the plain region. Large and high connected green spaces were mainly concentrate in the high mountain region,while small and fragmented green spaces were distributed in the plain region. Therefore,in the future urban-rural landscape planning and development process,we should focus on the protection of highquality agricultural land in the plain region,the connection of green space,and the suitable location of urban space（ e. g. hilly and mountain region）,and avoid the phenomenon of ＂urban space occupying agricultural land,agricultural land reclaiming barren land＂,to realize the urban transition,efficiency and intensive of resources,ecological and cooperation development.