南昌市城市化进程中土地利用景观格局稳定性分析

科学、合理地评估城市化进程中土地利用景观格局的稳定性,是优化土地利用景观格局、降低和防范生态环境风险的基础。以南昌市为例,运用RS和GIS技术,根据2006、2010、2016年TM影像解译结果,通过景观格局稳定性指数、分形模型和转移矩阵等指标,对研究区2006—2016年城市扩展过程中土地利用景观的内部稳定性进行分析。结果表明:(1)土地利用景观类型中,城市建设用地和耕地是南昌市主要的景观类型,2016年分别占研究区的35.24%和25.94%,景观优势明显,也是调控土地利用景观格局稳定性的主要部分。(2)南昌市土地利用景观的稳定性整体上具有明显差异,主要特征为城市建设用地持续增加,由2006年的250.41 km~2增加到2016年的311.76 km~2,林地、草地、水域、未利用土地和耕地的面积变化不大。研究区土地利用景观格局的稳定性总体表现出上升趋势。

Analysis of the stability of land use landscape pattern in the process of urbanization in Nanchang city

Scientific and rational evaluation of the stability of land use landscape pattern in the process of urbanization is the basic work to optimize the land use landscape pattern and reduce and prevent the ecological environment risk. Taking Nanchang city as an example, the internal stability of land use landscape in the process of urban expansion from 2006 to 2016 was analyzed by using RS and GIS technology and TM image interpretation results in 2006, 2010 and 2016. The results showed that: (1) Among the land use landscape types, urban construction land and cultivated land were the main landscape types in Nanchang, accounting for 35.24% and 25.94% of the study area in 2016, respectively. Landscape advantages were obvious, and they were also the main part to control the stability of land use landscape pattern. (2) Landscape stability of land use in Nanchang is obviously different on the whole. The main characteristic is that the urban construction land increases continuously, from 250.41 km2 in 2006 to 311.76 km 2 in 2016. The area of woodland, grassland, water area, unused land and cultivated land changes little. The stability of land use landscape pattern showed an upward trend in the study area.