1993～2003年郑州市土地利用/覆被变化特征研究

以河南省郑州市为例,利用RS、GIS软件对1993年和2003年两时次TM、ETM 影像进行遥感解译,采用GIS空间分析和数理统计分析等方法,研究了10 a来该市土地利用变化过程尤其是土地沙化的变化过程及其社会经济驱动机制。结果表明:10 a来,西部山区、东部沙化地区以及黄河沿岸地区土地利用类型的变化比较大,特别是东部地区用地变化比较剧烈;旱地、草地、工交建设用地面积明显增加,沙化土地、水田、林地、水体面积呈现减少的趋势;沙化现象得到了有效遏制,草地面积的增加,改善了研究区的生态环境。此外,林地面积的大量减少,应引起重视,可实行退耕还林或植树造林以建立良好的生态环境。

Land Use/Cover Change in Zhengzhou City in the Period Between 1993 and 2003

Land use/cover change is a result of complex interaction between natural factor and various human work,and social economic factor are the important drive force in short term.Taking Zhengzhou city of Henan province as an example,based on the interpretation features in remote sensing images of the TM images of 1993 and 2003,adopting spatial analysis of GIS and statistics analysis,in this paper,we studied the spatial-temporal process of Land Use/Cover Change in Zhengzhou City,especially the desertification process and its diving mechanism of social economy.The result shows that the variation of land use types is large in western mountainous area,eastern desertification area and the area along Yellow River,especially in the eastern region of Zhengzhou.The area of dry land,grassland and construction land has a obvious increase,but the area of desertification,irrigated land,forest land and water body has a decrease trend.The desertification phenomenon has got an effective containment,and the increase of grassland has improved the ecological environment of the studying area.While,it's time to pay attention to the decrease in forest land,and the establishment of favorable ecological environment can be set up by implementing returning land for farming to forestry or afforestation.