Characterization of ecological carbon stock changes in the Three Gorges migration impact area based on the evolution of soil and water resources:A case study of Kaizhou District,Chongqing Municipality
[Objective]Realizing the dual-carbon goal and practicing the two mountains theory are the fundamental principles of ecological low-carbon development in the new era.The influence of the evolution of soil and water resources on ecosystem carbon emission and carbon storage in areas strongly disturbed by human activities is not clear.[Methods]Taking Kaizhou District in northeastern Chongqing,which is an important part of the Three Gorges Reservoir District town cluster,as the study area,the re-gression trend method was used to analyze the stability characteristics of the vegetation cover in Kaizhou District,and the Carbon Sequestration Module of InVEST model was used to analyse the change of the carbon stock in Kaizhou District,so as to analyze the trends of the evolution of the vegetation cover in the study area,the changes in the carbon stock,and the trends of the socio-economic benefits in the study area in the wake of the above mentioned situation.[Results]The result show that from 2000 to 2020,the main land use types in the study area were cropland and forest land,both of which accounted for more than 75％of the total area.The spatial distribution of carbon stocks in terrestrial ecosystems in the study area is highly heterogeneous,showing a trend of high in the east,low in the west,high in the north and low in the south,and the increase of carbon stocks in the study area during the 20-year period is mainly due to the conversion of grassland to woodland,which amounted to 68.11 Gg,and grass-land to cropland,which amounted to 49.21 Gg,while the conversion of non-constructed land to constructed land,and the con-version of non-watersheds to watersheds caused the reduction of carbon stocks by a total of 269.78 Gg.[Conclusion]The evolu-tion of soil and water resources greatly influenced the change of carbon storage,and the utilization efficiency of soil and water resources is obviously positively correlated with economic development,and there are mutual influences and interactions among socio-economic development,the evolution of soil and water resources and the change of carbon stock.
"dual carbon"targetInVest modelcarbon stockspatiotemporal variationchanges in vegetation coverland use transfer matrixThree Gorges migration affected area
万方数据
维普
