浙江省耕地利用转型时空演变特征分析

Spatio-temporal evolution characteristics of cultivated land use transition in Zhejiang Province

基于浙江省2000、2010、2020年3期土地利用数据,构建涉及耕地利用转型的图谱分析模型,利用ArcGIS 10.6软件揭示浙江省耕地利用转型的时空演变特征。结果表明,浙江省耕地利用转型以林地占补和向建设用地转出为主,空间上由杭嘉湖平原、杭绍甬地区、甬温沿海经济带向浙中盆地丘陵区呈“C”型集聚,“东占西补”特征明显;耕地利用转型数量和空间分离度增加,耕地面积“占大于补”,但占补缺口正在缩小;耕地利用转型以后期变化型(即变化发生在2010—2020年)为主,林地是耕地补充的主要来源,建设用地占用耕地问题严重。基于此,建议持续盘活存量、带动增量、应对变量,推动山水林田湖草系统治理逻辑下的耕地资源优化配置和土地利用空间正义,实现耕地补充和建设用地保障“双向平衡”,生态保护、粮食安全、发展空间“三位一体”。

Based on the land use data of Zhejiang in 2000,2010 and 2020,geo-information tupu model regarding cultivated land use transition was constructed,and the spatio-temporal evolution characteristics of cultivated land use transition in Zhejiang Province were revealed by using ArcGIS 10.6 software.It was shown that the cultivated land use transition in Zhejiang mainly consisted of forestland occupation and supplementation,as well as transition to construction land,with a C-shaped spatial agglomeration,and presented remarkable characteristics of east-occupation-west-supplementation,and the spatial distribution changed from Hangjiahu plain,Hangshaoyong region and Yongwen coastal economic belt to the basin hilly region.The amount and separation degree of cultivated land use transition increased,and the occupation area was greater than the supplementation area,yet the gap narrowed.The cultivated land use transition mainly happened in the period of 2010-2020.The forestland was the main source for cultivated land supplementation,and the occupation of cultivated land by construction land was a major concern.In view of this,it was suggested that the stock should be revitalized,the increment should be promoted,and the variables should be tackled.What s more,the allocation of cultivated land resources should be optimized and the justice of land use should be ensured to finally realize the bidirectional balance of cultivated land supplementation and construction land safeguard,as well as the coordination of trinity system,which consists of ecological protection,food security and development space.