基于RS的延吉市农用地转换特征及其驱动力分析

利用遥感和地理信息系统技术,对1991,2001和2006年3个时期的TM影像进行校正、解译判读以及分类等处理,分别获取了延吉市各期土地利用类型数据,在其中提取出延吉市近15年间农用地空间格局的转换特征,并对其驱动力因素进行了分析.结果表明：1991—2001年间延吉市农用地变化率为4.55%,主要表现在未利用地大量转换为农用地;2001—2006年间延吉市农用地变化率为-8.20%,主要表现在农用地转换为居民地.造成延吉市农用地面积呈减少趋势的主要驱动因素为城市化、人口和土地收益.

A Study on the Conversion Characters and Driving Factors of Agricultural Land Change in Yanji City Based on Remote Sensing

The conversion characters and agricultural land-use pattern indices were computed and analyzed by using the Landsat TM data （with three images of Yanji City taken in 1991, 2001 and 2006 ） based on the Remote Sensing（RS） and Geographic Information System（GIS） technologies. The results showed that the rate of ehange（ROC） of the agricultural land was 4.55% due to the large area unutilized land changed to agricultural land from 1991 to 2001 and the ROC was --8. 20% due to the large area agricultural land changed to resident land from 2001 to 2006. Obviously, urbanization, population, and land profits were forecasted to be the main driving forces of agricultural land change.