Research On The Ecosystem Services Valuation Of Regional Greenways In Guangdong-Hong Kong-Macao Greater Bay Area

On the one hand,greenway is a compound ecosystem composed of multiple types of ecosystem units,which can provide multiple ecosystem services(ES).On the other hand,ES is the current research hotspot.However,there are still few studies on greenway ES at home and abroad.With the further development of greenway construction in the Pearl River Delta region(PRD)and the ecological construction opportunities in the Guangdong-Hong Kong-Macao Greater Bay Area(GBA),the ecological nature of the greenway has received more attention,but there is still a lack of research on the ES of regional greenways in the GBA.This study focuses on the construction of regional greenways in the GBA in 2018.Regional greenways in the GBA include the PRD Regional Greenway Line 1 to 6,and the regional scale greenways in the Hong Kong Special Administrative Region and the Macao Special Administrative Region as the research object,establishing an applicable ecosystem services valuation system,to quantify the ecosystem services of different greenway routes,urban sections and types along the route,and summarize the spatial distribution and specific characteristics of the regional greenways in the GBA in the ecosystem services.The main research content includes the following three aspects:1、Through the vectorization of greenway basic satellite images,and based on the theoretical basis and research needs,select six ecosystem service evaluation indicators for climate regulation,carbon fixation and oxygen release,soil conservation,water conservation,environmental purification and noise reduction,and comprehensive use The evaluation method of alternative market technology and simulated market technology adopts the functional value method to calculate the service value of the regional greenway ecosystem in the GBA.The results show that the total value of greenway ecosystem services in the GBA is11.723 billion yuan,of which the value of climate regulation is 8.179.7 billion yuan,the value of carbon fixation and oxygen release is 2.5541 billion yuan,the value of soil conservation is624.8 million yuan,and water conservation The value is 241.2 million yuan,the value of purifying the environment is 91.3 million yuan,and the value of reducing noise is 32.6million yuan;2、Combining the value calculation results and the value spatial distribution map made on this basis,using spatial data visualization to compare and analyze the regional greenway ecology of the GBA from the three aspects of greenway routes,urban sections and types along the route The spatial distribution and specific composition of the various and overall values of the system services.The results show that in terms of spatial distribution,climate regulation,carbon fixation and oxygen release,and water conservation this three values,as well as the total value,are concentrated in the greenway of the urban agglomeration on the east coast of the GBA,and the spatial distribution is uneven.In contrast,the overall spatial distribution of the value of maintaining the soil,purifying the environment and reducing noise is relatively uniform.However,the overall spatial distribution of the service value of the greenway ecosystem is uneven,with significant value differences and polarization.In terms of specific components,climate regulation,carbon fixation and oxygen release,soil conservation,water conservation,environmental purification,noise reduction,and total value are the highest on the Greenway Line 2,Shenzhen Section or Guangzhou Section,and on the Greenway Hong Kong-Macao Line And the Macau section is the lowest.In addition to maintaining the highest soil value in the suburban greenway and the lowest in the urban greenway,the value of climate regulation,carbon fixation and oxygen release,water conservation,environmental purification,noise reduction,and total value are still the highest in ecological greenway.The urban greenway is the lowest;3、Based on the above analysis and evaluation results,explore the influencing factors and related relationships of the greenway ecosystem service value.Under the current development conditions,from the three aspects of greenway routes,urban sections and types along the lines,an optimization and promotion strategy for the service value of the greenway ecosystem is proposed to realize the sustainable development of the greenway and the region.From the perspective of ecosystem services,this study conducts a quantitative study on the construction of regional greenways in the GBA from the regional scale,and comprehensively understands the spatial distribution and specific composition and characteristics of the regional greenways ecological services in the GBA.And proposed corresponding optimization and improvement strategies,which enriched the research on greenway ecosystem services,and is of great significance to the sustainable development of regional greenways in the GBA,greenway construction in my country,and the entire GBA.