环太湖耕地利用变化与驱动机制研究──以苏州市吴中区为例

Change in Land Use of Cultivated Land Around Taihu Lake and Its Driving Forces——The Case of Wuzhong District of Suzhou City

以环太湖苏州市吴中区为样区,利用统计资料、遥感数据和典型调查数据,结合RS和GIS技术,分析18年来耕地利用变化特点与驱动机制。结果表明:研究区耕地年递减率为1.6%,表现出以水域和各类非农建设用地大量占用耕地为突出特点的区域土地动态变化特征;耕地数量变化与区位和地形有关;种植业对耕地利用强度出现波动下降趋势,作物生产由粮食作物生产为主转化为粮食与经济作物生产并重;其变化机制主要是经济发展、人口增长、农业结构调整和政策因素驱动。最后,并在此基础上提出相关建议。

Based on statistics data, remote sensing images, and case-investigations of cultivated land collected from 1984 to 2002, and with the help of the RS and GIS software, characteristics of the change in land use of cultivated land and its driving forces in the Wuzhong District of Suzhou City were analized. Results showed that the acreage of cultivated land was decreasing at the rate of 1.6% a year, and the change in land use was characterized by decrease in cultivated land and increases in water surface and construction land; the change in acreage of cultivated land was related to its geographic and topographic factors; the utilization intensity of the plantation of cultivated land has been declining with fluctuation; and the plantation has been changing from the grain-based cropping system to a grain-cash crop-based cropping system. Economic development, population growth, agricultural structural readjustment and policies were the main driving forces of the change. In the end of the paper, some suggestions are set forth.