基于土地利用详查数据的陕西省耕地变化动态分析

Dynamic Changes of the Cultivated Land in Shaanxi Province——Based on the Detailed Survey of Land Use

本文基于土地利用详细调查数据 ,应用单一土地利用类型动态度、土地利用类型相对变化率、土地利用类型转移速率、土地利用类型新增速率和土地利用类型变化速率全面刻画了陕西省 1 991— 2 0 0 1年耕地的动态变化。结论是 :在 1 991— 2 0 0 1年间 ,陕西省全省耕地在减少 ,各地减少的程度不同 ,延安减少最多 ,渭南减少最少 ;耕地变化存在明显地区性差异 ,耕地变化比陕西省耕地变化大的地区有延安、铜川、咸阳和商洛 ,其它地区耕地变化比全省耕地变化小。耕地转移的方向各地明显不同 。

Based on the detailed survey of land use in Shaanxi Province during 1991—2001,using the single dynamic degree model, relative change rate model, convert rate model, new increase rate model and change rate model of land use, this paper analyzed the cultivated land use in Shaanxi Province. The conclusions are as follows: the area of the cultivated land in Shaanxi decreased during1991 and 2001. But it decreased differently in different regions, with Yan'an decreasing greatly, and Weinan decreasing least. The cultivated land changed differently in different regions. The cultivated land in Yan'an, Tongchuan, Xianyang and Shangluo changed greatly more than in total Shaanxi, with the cultivated land in other regions changing least more than in total Shaanxi. The direction of the cultivated land change toward was different in different regions, and the newly increased cultivated land also different in different regions.