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[1]Wang Huaiyi,Li Zhongkui.Dynamic Changes and Vulnerability Analysis of Carbon Storage in the Weihe River Basin Ecosystem Based on LUCC[J].Research of Soil and Water Conservation,2024,31(06):252-260,270.[doi:10.13869/j.cnki.rswc.2024.06.031]

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Dynamic Changes and Vulnerability Analysis of Carbon Storage in the Weihe River Basin Ecosystem Based on LUCC

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 31 Number of periods: 2024 06 Page number: 252-260,270 Column: Public date: 2024-12-10

Title:: Dynamic Changes and Vulnerability Analysis of Carbon Storage in the Weihe River Basin Ecosystem Based on LUCC

Author(s):: Wang Huaiyi, Li Zhongkui; (Research Institute of Forestry Policy and Information, Chinese Academy of Forestry, Beijing 100091, China)

Keywords:: LUCC; Weihe River Basin; carbon storage; dynamic changes; vulnerability; InVEST model

CLC:: X196; F062.2

DOI:: 10.13869/j.cnki.rswc.2024.06.031

Abstract:: [Objective]The aims of this study are to exploring the impact mechanism of land use/cover change(LUCC)on terrestrial ecosystem carbon storage, and to provide theoretical basis for effective national spatial planning and ecological protection and restoration. [Methods]The Weihe River Basin was taken as the research object. The InVEST model was used to quantitatively evaluate the spatiotemporal evolution characteristics and distribution pattern of terrestrial ecosystem carbon storage from 1980 to 2020. The impact of land use change on regional carbon storage was analyzed. The vulnerability of watershed ecosystem carbon storage was explored using the PI index. [Results](1)From 1980 to 2020, the land use types in the Weihe River Basin were mainly cultivated land, forestland and grassland, with the area of the three major land types accounting for about 95% of the total basin area. The majority of land use transfer was from cultivated land to construction land, with the area of approximately 1 734.93 km².(2)From 1980 to 2020, the overall carbon storage in the Weihe River Basin showed a fluctuating downward trend, with a cumulative decrease of 3.876 4×10⁶ tons, the conversion of arable land to construction land was the main factor leading to the decrease. The overall spatial distribution showed a distribution characteristic of ‘high level in the south and low level in the north,.(3)Farmland, forestland, and grassland were the main sources of carbon storage in the Weihe River Basin ecosystem, with contribution rates of 38.91%, 27.60% and 30.00% in 2020, respectively. The total contribution rate of the other three types of land was less than 4%.(4)The land use change in the Weihe River Basin from 1980 to 1990 had a positive impact on carbon storage, while it had a negative impact in the other periods. The carbon storage of the downstream ecosystem was more fragile. [Conclusion]In the past 40 years, carbon storage in the Weihe River Basin has shown fluctuating changes with land use. The increase in forestland will have a positive impact on regional carbon sequestration capacity. In future national spatial planning, attention should be paid to the rational allocation of construction land and ecological land such as forestland and grassland.

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Last Update: 2024-12-10