摘要
以三江平原腹地挠力河流域为研究区,基于1990年、2002年、2013年3期遥感数据分析了该地区水田化进程中耕地时空变化特征,为耕地资源的利用与开发提供依据。结果表明:20多年间流域耕地呈现不稳定增长态势,旱地和水田的变化趋势与耕地综合变化趋势不完全一致;1990—2002年旱地变化幅度小,水田变化幅度大,2002—2013年旱地面积比例由44.57%下降至42.24%,水田继续保持增长趋势,但增长速度明显放缓;耕地转入上,流域耕地子类型的内部转换发生明显。旱地主要转入用地类型为未利用地、水田和林地,水田主要转入用地类型为旱地。耕地转出上,1990—2002年流域的旱地水田流出以耕地内部转换为主,2002—2013年旱地和水田的转出与1990—2002年转换趋势基本保持一致。
Based on the remote sensing data in 1990,2000,2013,spatial and temporal change characteristics of the arable lands during the period of becoming paddy fields in the Naolihe River Basin of Sanjiang Plain are analyzed,aiming to provide the basis for the utilization and exploitation of the arable land resources.The results showed that it was unstable for the growth of the arable lands in the Naolihe River Basin during the20 years,and change trend of the dry lands and paddy fields was not completely according with the comprehensive change trend of the arable lands;during the period from 1990 to 2002,change trend of the dry lands was small while paddy field was big,and during the period from 2002 to 2013,the dry land area declined from 44.57%to 42.24%,while the paddy fields kept to grow with obvious slowed speeds;on arable lands transfer in,the internal conversion among subtypes in the Naolihe River Basin was obvious.The newly increased dry lands were mainly the unutilized lands,paddy fields and forestlands,while dry lands were the resources of the increased paddy fields.On arable lands transfer out,during the period from 1990 to 2002,the transferred out dry lands and paddy fields in the Naolihe River Basin were mainly the internal conversion,and the transfer trend of the transferred out dry lands and paddy fields during the period from 2002 to 2013were basically according with the situation during the period from 1990 to 2002.
出处
《水土保持研究》
CSCD
北大核心
2016年第5期63-67,73,共6页
Research of Soil and Water Conservation
基金
黑国土科研"两大平原现代农业综合配套改革试验区土地管理制度创新研究"(201411)
