基于遥感的山东黄河流域土地利用动态及有林地转移

选取了2000、2006年时相相近的TM遥感影像作为基本数据源,利用全球定位系统(GPS)、全站仪等仪器,采取典型、随机抽样方法采集了山东黄河流域378个样点的外业数据,采用监督分类法进行土地利用的分类和验证.结果表明:流域中的农田占总面积48%,建设用地占13%,有林地约占25%.6 a间,有林地转移的速率最大,大部分转化为农田、宜林荒山荒地和建设用地;灌木林、疏林地和其他林地的减少量中大部分转移为有林地;宜林荒山荒地得到大力改造,其减少量中有21%转化为有林地,11%转化为农田;农田的减少量中有12%转化为有林地;流域的土地利用格局朝好的方向发展,有林地逐年增加,到2036年达到峰值,森林覆盖率达30%,森林生态系统此时达到相对稳定.

Dynamic study on land use and forest land transfer based on remote sensing in Yellow River basin of Shandong Province, China

In the paper,two periods(2000 and 2006) of TM remote sensing images with similar temporal were selected as the basic data sources,378 sample points were collected with the method of typical and random sampling by global positioning system(GPS) and the total station.Supervised classification was carried on the land use classification and the confirmation.The results indicated that the cropland took the highest part in Yellow River basin of Shandong Province,with 48% of the total basis area,and in the second place,the forest land took 25%,and then,the construction land occupied 13%.During 6 years,metastasis rate of forestland was highest,and most of the forest land transformed into cropland and construction land.In the decrement of barren hills suitable for afforestation,21% of it transformed into forestland,and 11% into cropland.In the decrement of cropland,12% of it transferred into forestland.Land use pattern developed toward the good direction in the basin,the forest land increases year by year and achieves the peak value in 2036,the forest coverage will reach 30%,and the forest ecosystem will achieve relative stabilization in that time.