1988～2008年新丰江流域土地利用变化分析

Changes analysis of land use in Xinfengjiang River Basin from 1988 to 2008

以广东省重要水源地新丰江流域为研究对象,基于遥感技术和GIS技术,利用LandsatTM和ALOS卫星影像数据获取1988年、1998年和2008年3个时相的土地利用数据,对比分析研究时间内流域土地利用的时空变化特征;结果表明,20年来,流域的农用地和建设用地的面积均有增大,但建设用地的增幅较大,河流和水库的面积先增加后略减少,林地的面积持续减少;建设用地的增加主要是侵占了农用地,农用地的增加主要是侵占了林地,农用地面积虽然增加,但是质量降低了,河流和水库面积的变化是受到流域降水和水库水量调整的影响。

In this paper Xinfengjiang river basin, the most important water head site in Guangdong Province, was selected as research area. Three temporal Landsat TM （1988 and 1998） and ALOS （2008） satellite images data were used to class the land use data. Then the temporal-spatial change characteristics of land use data in Xinfengjiang river basin were analyzed in this paper. The results clearly show that agricultural land and construction land are increasing while forest land is decreased in the past two decades. The development trend of water and reservoir was changing from a growth during 1988~ 1998 to a slight decline during 1998~ 2008. The growth of construction land occupied agriculture land, the increasing of agriculture came from forest land. The area change of river and reservoir is influenced by rainfall of basin and reservoirs adjustment.