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利用多时段景观遥感制图信息和景观格局分析方法,对深圳市龙华地区快速城市化过程中农业用地的结构和空间分布特征进行了研究。主要结论如下:(1) 快速城市化过程导致农田面积显著减少,对果园的总体规模影响不大;(2) 1992 年是工作区内城市化过程影响最为剧烈的年份,农田的碎裂化过程可以分成两个不同的阶段;(3) 农田和果园的空间分布均维持了相对微观异质性随机分布,但均匀性程度有所降低。果园在中尺度区间的空间分布与农田相比表现出显著的差异,连续尺度的空间分布表现出不均匀( 小尺度:滑箱边长小于8 个像元) —均匀( 中小尺度:边长在8 ~50 个像元之间) —不均匀( 中尺度:边长在50 ~200 个像元之间) —均匀( 中大尺度:边长大于200 个像元) 的变化规律;(4) 人为改造作用是景观动态变化的主要驱动力来源,并且表现为一种中尺度影响过程,地形因子则为背景性影响因素;(5) 景观改造活动由于未能兼顾农业组分在区域生态稳定性维护方面的价值,两种组分的整体结构和功能稳定性有所降低。
Using multi-period landscape remote sensing mapping information and landscape pattern analysis method, the structure and spatial distribution characteristics of agricultural land in the rapid urbanization of Longhua area in Shenzhen were studied. The main conclusions are as follows: (1) The rapid urbanization led to a significant reduction of the farmland area, which had little effect on the overall size of the orchard. (2) 1992 was the year with the most intense urbanization in the work area. Can be divided into two different stages; (3) The spatial distribution of farmland and orchard maintained the relative heterogeneity of stochastic distribution but the degree of homogeneity decreased. The spatial distribution of orchards in the mesoscale interval showed a significant difference compared with that of the farmlands, and the spatial distribution of successive scales showed a nonuniformity (small scale: less than 8 pixels on the slider side) - uniform (small and medium scale: 8 to 50 pixels) - Uneven (mesoscale: side length between 50 and 200 pixels) - Uniform (medium and large scale: more than 200 pixels per side) Man-made reconstruction is the main source of driving force for the dynamic landscape change, and appears as a mesoscale impact process. Topographic factors are the background influencing factors. (5) Landscape rebuilding activities can not balance the ecological stability of the agricultural components in the region The value of maintenance, the overall structural and functional stability of the two components is reduced.