By using Ripley's K and taking TM remote sensing images of Pingjiang County in 2001,2009 and 2016 as data sources,the characteristics and changes of the landscape pattern in Pingjiang County were studied so as to provide scientific basis for its sustainable development and landscape planning.The results showed that from 2001 to 2016 in Pingjiang County,the areas of forestland and construction land increased largely,while those of farmland,waters and garden land decreased gradually,among which the trend of the waters was reducing more gentle.In addition,the spatial characteristics of all landscape types changed variously.On the whole,the spatial aggregation degree of waters,construction land and farmland decreased and became more uniform.Meanwhile,the spatial characteristic of forestland increased with the decrease of the area,and that of the garden land tended to be randomly and its aggregation degree decreased.3figs.,15refs.%基于2001、2009和2016年平江县TM 遥感影像,应用Ripley K函数分析了平江县县域景观格局的特征及其变化,以期为平江县的可持续发展及景观规划提供科学依据.结果表明: 2001~2016年间,平江县林地和建设用地面积逐渐增大;耕地、水域和园地面积则逐渐减少,其中水域面积减少趋势较平缓.在研究期间,研究区的各种景观类型在空间分布特征上均发生了显著的改变,总体表现为水域、建设用地和耕地的空间聚集程度降低,分布的均匀度增加;林地的空间分布随着面积的降低聚集性增强;园地的空间分布则趋向于随机分布,聚集程度减弱.
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