耕地时空动态变化分析
2021-03-01潘世东张卉
潘世东 张卉



摘要 根据宣州区2010—2017年土地利用变更调查数据,采用土地利用转换矩阵、土地利用动态度模型对宣州区这一时期耕地时空动态变化进行分析。结果表明,宣州区耕地动态变化过程较为复杂,总体数量呈逐年减少趋势,水田主要转出、旱地主要转入;空间分布上,减少的耕地主要集中在城区周边及各类线性基础设施建设上,增加的耕地分散在整个行政辖区;时间跨度上,2010—2014年耕地变化程度剧烈,2014—2017年变化程度较为缓和。
关键词 耕地;动态变化;转换矩阵;宣州区
中图分类号 F301.2 文献标识码 A 文章编号 0517-6611(2021)01-0060-06
doi:10.3969/j.issn.0517-6611.2021.01.016
Abstract According to the land use change survey data of Xuanzhou District in 2010-2017,land use transformation matrix and land use dynamic degree model were used to analyze the temporal and spatial dynamic changes of arable land in Xuanzhou during this period.The results showed that the dynamic change process of arable land in Xuanzhou District was complex, and the total amount was decreasing year by year,main transfer out was paddy field and main transfer in was dry land.Spatial distribution,the reduced arable land was mainly concentrated in the surrounding areas of urban areas and all kinds of linear infrastructure construction,the increased arable land was scattered throughout the administrative area.In terms of time span, the degree of arable land change from 2010 to 2014 was drastic, and the degree of change from 2014 to 2017 was relatively moderate.
Key words Arable land;Dynamic change;Transformation matrix;Xuanzhou District
“十分珍惜和合理利用每一寸土地,切實保护耕地”是我国基本国策。“十二五”以来,耕地保护虽然取得一定成绩,但其面临的形势依然严峻。研究耕地时空动态变化过程及差异,对实现耕地资源可持续性和集约化利用[1]、制定区域开发战略和国土整治、促进区域经济可持续发展[2]都有重要意义。纵观国内外专家学者对耕地时空动态变化的研究,谭莉梅等[2-4]利用遥感影像、土地利用现状数据,以模型方法为支撑、运用GIS技术,对耕地时空变化、耕地重心动态变化特征进行了分析;陈学渊等[5-6]利用土地利用转移矩阵、土地利用动态度模型对耕地格局时空动态变化的过程和差异、耕地时空分布及其特征进行了研究。然而目前国内诸多学者的研究,以区域大尺度、地形较为单一的研究区域较多,对于县域耕地尺度、地形较为复杂的丘陵山区耕地时空动态变化分析较少。……
