江苏省蓝绿空间占比现状及优化建议

蓝绿空间是城乡自然生态空间的重要组成部分,是城乡生态体系中密切关联的有机整体。文中基于江苏实际及国土调查主要数据,通过分析江苏全省及13个设区市蓝绿空间占比现状和动态得出,江苏省目前蓝色空间大于绿色空间,苏州、无锡、常州、盐城、南京、扬州、南通7市蓝绿空间占比高于全省水平,淮安市接近全省水平,镇江、宿迁、连云港、泰州、徐州5市低于全省水平;10年来,江苏蓝色空间和绿色空间在变化趋势上存在明显差异,全省蓝绿空间总体有所下降,蓝色空间略有减少,绿色空间基本持平。在此基础上,提出以刚性的蓝绿空间占比指导江苏省国土空间开发格局、科学设置江苏省及设区市蓝绿空间占比目标值、设置森林资源数量下限、依法加强蓝绿空间动态监测等发展建议。

Status Analysis and Optimization Suggestions in the Proportion of Blue-Green Space in Jiangsu Province

Blue-green space is an important part of urban-rural natural ecological space and a closely related organic whole in the urban-rural ecosystem. This paper expounds on the specific land cover types of blue-green space based on the reality of Jiangsu. The current situation and dynamics of the proportion of blue-green space in Jiangsu province and 13 cities with districts are analyzed based on the primary data of the land survey. This paper thinks that blue space is larger than green space in Jiangsu, and the proportion of blue-green space in Suzhou, Wuxi, Changzhou, Yancheng, Nanjing, Yangzhou, and Nantong is higher than provincial level. The proportion of blue-green space in Huai'an is approaching to provincial level, and the proportion of blue-green space in Zhenjiang, Suqian, Lianyungang, Taizhou, Xuzhou is lower than provincial level. Significant differences existed in the change trends between blue and green space during the last 10 years: the total amount of blue-green space in Jiangsu was declining, of which blue space was decreased slightly and green space was almost unchanged. Four suggestions are proposed which inlude using the rigid proportion of blue-green space to guide the territorial spatial development pattern, setting the target value of the proportion of blue-green space scientifically for Jiangsu province and cities with districts, setting the lower limit of forest resources quantity and strengthening dynamic monitoring of blue-green space according to the law.