四川丘陵地区土地整理项目景观格局变化分析——以仪陇马鞍镇南海村土地整理项目为例

Analysis on Change of Landscape Pattern in Land Consolidation Project of Hill Area in Sichuan Province ——Based on Land Consolidation Project of Nanhai Village in Ma′an Town of Yilong County

以仪陇马鞍镇南海村土地整理项目区为例,以土地整理前后1:2000实地调绘结果数据为基本数据源,采用景观格局指数分析其景观格局变化,探讨土地整理对景观变化的影响。结果表明,坡(地)改梯(田)后耕地中田块斑块数量和斑块密度增加,平均斑块面积和最大斑块指数减小,景观破碎度增加;耕地类中的旱地、农村宅基地及林地斑块数量和斑块密度降低,平均斑块面积和最大斑块指数增大,景观破碎度降低,景观形状较整理前变得规则;景观多样性指数和景观丰度指数降低,景观类型有所减少。

Method of GIS technology combined with landscape ecology analysis was employed based on the investigation data before and after land consolidation in scale 1 ： 2000. The results showed that the area of farmland increased, patch number and patch density increased too, average patch area and large patch index decreased, so fragmentation degree increased. But the area of forestland, rural housing land and unused land decreased, average patch area and large patch index increased, so landscape fragmentation degree decreased. The shape was more regular than before land consolidation. Landscape diversity index and landscape richness decreased because the landscape type decreased.