基于MSPA的衡阳市绿色基础设施空间格局演化研究

Research on Spatial Pattern Evolution of Green Infrastructure in Hengyang City Based on MSPA

随着我国城市化进程不断加快,自然资源和土地空间不断被吞噬,环境问题频发。基于衡阳市2015年、2017年和2019年的土地利用数据,进行衡阳市绿色基础设施空间格局演化分析。研究发现:衡阳市的城市建设逐步从数量增长型转变为质量提升型;衡阳市GI空间的核心区域以湘江、蒸水水域为骨架,连接其他散落的核心区域,自然区域与建设用地之间的对立性减弱;选取斑块密度、最大斑块指数、斑块平均大小、分离度指数、香农多样性指数、香农均匀度指数和聚集度指数,反映衡阳市GI空间格局的演化特征,发现2015—2019年间,衡阳市的GI空间格局出现波动,相比于2015年,2019年衡阳市GI空间的整体性下降,斑块破碎化严重。

With the continuous acceleration of urbanization in China,natural resources and land space are constantly being consumed,and environmental problems frequently occur.Based on the land utilization data of Hengyang City in the year of 2015,2017 and 2019,this paper aims to analyze the evolution of the spatial pattern of green infrastructure in Hengyang City.The study found that:the urban construction of Hengyang City has gradually changed from quantity-oriented to quality-oriented;the core area of GI space is surrounded by Xiangjiang River and Zhengshui waters,connecting other scattered core areas,and the antagonism between natural areas and construction land is weakened.Compared with 2015,the integrity of the GI space in Hengyang City in 2019 decreased,and was severely fragmented.