基于遥感技术的耕地面积动态监测研究

Study on Dynamic Inspecting of Cultivated Land Area by Using Remote Sensing

对耕地面积实施监测,遥感技术是一种非常有效的方法。通过分析相应时相的TM和中巴遥感影像的波谱特征,采用波段比值法,结合野外调查,对北京地区30年来耕地的变更情况进行了监测。监测分析表明,北京市耕地面积从30年前的614941hm2减少到现在的388902hm2,呈较严重的递减趋势。本课题的研究成果为北京市土地管理和土地利用规划提供了重要的依据。

Remote sensing technology is already very effective for dynamically monitoring area of cultivated Land. Using CBERS-1 satellite image data and TM image data as remote sensing information source, selecting band ratio method, combined field surveying, the authors monitored changes of area of cultivated Land during 1975-2005. The result is that, in the last 30 years, the area of cultivated Land in Beijing decrease from 614941 hectare to 388902 hectare. Results of this experiment provided base for land manage and land use planning in Beijing.