基于景观生态指数下的城市绿道网络规划评价及优化研究--以潮州市为例

Evaluation and Optimization of Urban Greenway Network Planning Based on the Landscape Ecological Index——A Case Study of Chao Zhou City

基于景观生态学基础理论,以潮州市为研究对象,选取斑块指数、廊道指数、网络结构指数建立了城市绿道网络规划评价指标体系,借助FRAGSTATS和GIS软件对潮州市绿道网络规划的景观生态指数进行了评价,并从景观生态方面进行了优化。结果表明:1斑块指数方面,潮州市绿道网络规划后景观斑块密度小,斑块相互之间联系密切。2廊道指数方面,潮州市绿道网络规划的绿道慢性道宽度在满足人们的游憩需求上仍有欠缺,应当及时调整;潮州市绿道网络规划后廊道密度较高,生态斑块间连通度和可达性较好。3网络结构指数方面,潮州市绿道网络规划后网络环通度、线点率、连接度较差,绿道网络结构不完善。根据结果从绿道慢性道宽度和绿道网络结构指数方面进行优化,得出了最佳方案。希望对其他同类城市提供一定的参考。

Based on the basic theory of landscape ecology, takingChaozhou as the research object, we seleetedplaque index, corridorindex, the network structure index to establish the evaluation index system of urban greenway net- work planning. With the help of FRAGSTATS and GIS software, we evaluatedthe landscape ecological index of greenway network planningin Chaozhou, and optimized itfrom the aspect of landscape ecology. The results showed that：① as to plaque index, Chaozhou landscape patch density was small. After the greenway network planning, plaque was closely related with each other. ② as tothe corridor index, the width ofcrawlerway in Chaozhou greenway network planningwas still lackingto meet the demand of people＇s leisure, whichshould be,timely adjusted; after the road network planning, green corridor densitywas higher and connectivity and accessibilitybetween ecological patches were good. ③ as tonetwork structure index, after the greenway network planning,the network, circuitry, line point rate andconnectivity were low,inChaozhoui.e, the greenway network structure was not perfect, According to the re- sults,we shouldoptimize thenetwork from the aspects of crawlerway width and greenway network structure indexin order toachieve the Best solution. And wehopedthis studycould provide reference value for other similar cities.