Potential supply and actual use of ecosystem services——A case study of Miyun Reservoir
Taking Miyun Reservoir,an important water source in Beijing,as the object,the potential supply and actual use value of water source conservation,flood regulation and storage,water purification and climate regulation were calculated by shadow engineering method and alternative cost method.The results showed that:(1)in 2020,the potential supply value of Miyun Reservoir was 67.142 billion yuan,and the actual use value was 30.342 billion yuan.From 2000 to 2020,the growth rate would be 3.8% and 76.6% respectively.(2)In 2020,the average utilization rate of ecosystem services in Miyun Reservoir was 45.2%,which increased by 18.6% from 2000 to 2020.(3)The potential supply of Miyun Reservoir was positively correlated with the actual use value.The greater the supply intensity of ecosystem services,the higher degree of human use of ecosystem services.(4)In 2020,Miyun Reservoir,accounting for about 6.3% of the area of Miyun District,would bear about 35.1% of the potential supply value and 75.5% of the actual use value of the whole district.The case study showed that the potential supply could provide data support for the benefit assessment of ecological protection projects and measures,and the actual use could be included in the national economic accounting,providing decision support and policy guidance for the formulation of ecological compensation and ecological trading standards.
ecosystem servicespotential supplyactual useMiyun ReservoirSystem of National Accounts(SNA)
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