Accounting of Ecosystem Service Value in Chengdu-Chongqing Double Circle

With the rapid development of urbanization and the rapid progress of economy and society, high-intensity development and utilization activities have brought frequent disturbances to natural ecosystems, seriously weakened the supply capacity of ecosystem services such as climate regulation, hydrology regulation, soil conservation and biodiversity maintenance, and thus posed no small threat to regional ecological security and sustainable development. Chengdu-Chongqing Economic Circle plays an important role in promoting the construction of the Yangtze River Economic Belt and consolidating the ecological barrier in the upper reaches of the Yangtze River. However, the advancement of industrialization and urbanization has also led to the shrinkage of natural ecological space and degradation of ecosystem service functions in this region to a certain extent. Therefore, it is particularly urgent to conduct in-depth research on ecosystem services. Therefore, this paper takes the Chengdu-Chongqing Economic Circle as the research object, and uses the equivalent factor method to calculate the ecosystem service value of different land types and different service types in 2005, 2010, 2015 and 2020. The results showed as follows: 1) Cultivated land and forest land were the main land types in Chengdu-Chongqing urban agglomeration. 2) From the perspective of ecosystem service value contribution of different land types, the ranking order is: forest land > cultivated land > water area > grassland > unused land. 3) From the perspective of the value of ecosystem services at each level, the regulation services > support services > production services > cultural services.