摘要
城市绿色空间是生态系统的重要组成部分,研究城市绿色空间演变及其生态效益,揭示两者之间的作用机制,能够为改善生态环境、协助城市可持续发展提供理论依据。基于合肥市区的遥感影像图,借助ENVI、ARCGIS、ArcView等相关软件,利用监督分类法对其进行解译分类,分析绿色空间演变及其在固碳、空气净化、暴雨径流削减、热岛效应等方面的生态效益变化情况。结果表明:(1)合肥市区绿色空间面积降低516.59 km^(2),其中大部分转变为建设用地,转化面积占据了2020年建设用地面积的74.9%,无植物覆盖、低植被覆盖度地区增加255.5 km^(2),景观格局向破碎化且异质化发展;(2)合肥市区绿色空间生态效益在总量上共计减少4.2亿元,固碳、大气污染物去除、暴雨径流削减分别减少了1.77亿元、548.9万元以及2.61亿元,同时生态系统服务需求增至原来的700倍;(3)原围绕中心城区、长江西路等地的高温区,随城市空间扩展而不均匀的扩散到合肥市区范围内的大部分地方,同时研究区域内地表温度随区域植被覆盖度降低而增高,呈现出明显的负相关。合肥市区城市绿色空间面积随着城市化进程推进而降低,其产生的生态效益也随之降低,致使城市出现生态系统服务能力降低、生态供需失衡、热岛效应加强等问题。
Urban green space is an important components of ecosystem,therefore,studying the evolution of urban green space and its ecological benefits,revealing the mechanism between them can provide a theoretical basis for improving the ecological environment and assisting urban sustainable development.With the help of envi,ArcGIS,ArcView and other relevant softwares,the remote sensing image maps of Hefei Municipal Area is interpreted and classified using the supervised classification.and the evolution of green space and its ecological benefits in carbon sequestration,air purification,soil and water conservation,heat island effect and so on are analyzed.The results show that:(1)the area of green space in Hefei Municipal Area is reduced by 516.59 km^(2)while most of them have been converted to the construction land,which accounts for 74.9%of the construction land area in 2020.At the same time,unvegetated areas and low vegetated areas have increased by 255.5 km^(2)while the urban landscape pattern varies with different functional zoning,and is constantly developing towards fragmentation and heterogeneity.(2)The total ecological benefits of green space in Hefei Municipal Area decreased by 420 million yuan,whil carbon sequestration,air pollutant removal and storm runoff reduction decreased by 177 million yuan,5.489 million yuan and 261 million yuan respectively.In the meantime,the demand for ecosystem services have increased to 700 times;(3)With the expansion of urban space,the original high-temperature areas around the central urban area and Changjiang West Road spread unevenly to most parts of Hefei Municipal Area Meanwhile,the surface temperature in the study area increased with the decrease of regional vegetation coverage,showing an obvious negative correlation.The area of urban green space in Hefei urban area decreases with the advancement of urbanization,and its ecological benefits also decrease,resulting in problems such as the reduction of ecosystem service capacity,the imbalance between ecological supply and demand,and the strengthening of heat island effect.
作者
姚侠妹
陈媛媛
偶春
张清怡
姚晓洁
YAO Xia-mei;CHEN Yuan-yuan;OU Chun;ZHANG Qing-yi;YAO Xiao-jie(School of Architecture and Urban Planning,Anhui Jianzhu University,Hefei 230601,China;Anhui Academy of Territory Spacial Planning and Ecology,Hefei 230601,China;School of Biology and Food Engineering,Fuyang Normal University,Fuyang 236037,China)
出处
《长江流域资源与环境》
CAS
CSSCI
CSCD
北大核心
2023年第1期51-61,共11页
Resources and Environment in the Yangtze Basin
基金
教育部人文社会科学研究青年基金项目(18YJC760117)
安徽省社会科学创新发展研究课题(2021CX182)
安徽建筑大学博士科研启动基金项目(2020QDZ15)
安徽省高校自然科学研究项目(KJ2020A0456)
安徽省高校优秀青年人才支持计划项目(gxyq2021197)
安徽省高峰学科培育课题(2021-138)
关键词
绿色空间
时空演变
生态效益
CITYGREEN
合肥市区
urban green space
spatio-temporal evolution
ecological benefit
CITYGREEN
Hefei municipal area
作者简介
姚侠妹(1981~),女,副教授,主要研究方向为景观规划与城乡发展.E-mail:yaoxiamei@126.com;通讯作者:姚晓洁,E-mail:yaoxj661@sina.cn
