[1]Sun Ziting,Yuan Jie,Li Xiaoyan,et al.Research on land use change and spatiotemporal distribution of carbon storage on the southern slope of Qilian Mountains based on the InVEST model[J].Research of Soil and Water Conservation,2025,32(03):332-342.[doi:10.13869/j.cnki.rswc.2025.03.029]
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Research on land use change and spatiotemporal distribution of carbon storage on the southern slope of Qilian Mountains based on the InVEST model
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
32
Number of periods:
2025 03
Page number:
332-342
Column:
Public date:
2025-06-20
- Title:
- Research on land use change and spatiotemporal distribution of carbon storage on the southern slope of Qilian Mountains based on the InVEST model
- Keywords:
- carbon storage; land use change; InVEST model; hot and cold spot analysis; southern slope of Qilian Mountains
- CLC:
- X171.1
- DOI:
- 10.13869/j.cnki.rswc.2025.03.029
- Abstract:
- [Objective] The relationship between carbon storage changes and land use patterns is closely linked. This study explores the relationship between land use change and carbon storage, aiming to optimize land use structure and enhance regional carbon sequestration capacity. [Methods] Taking the southern slope of the Qilian Mountains as the study area, the land use and carbon density data were used as the input parameters of the InVEST model to study the changes in carbon storage caused by land use change and the characteristics of temporal and spatial variation of carbon storage. [Result] (1) From 2000 to 2020, the area of land use types on the southern slope of the Qilian Mountains showed the characteristics of continuous increase of unused land and forest land, continuous decrease of grassland, decrease and subsequent increase of cultivated land, construction land, and water area. From 2000 to 2010, the change rate of unused land was the largest, and the change rate of grassland was the smallest. From 2010 to 2020, the change rate of construction land was the largest, and the change rate of grassland was the smallest. From 2000 to 2010, grassland transfer was the main reason for the increase of unused land. From 2010 to 2020, the reduction in grassland was mainly due to its conversion to unused land and forest land. And the significant expansion of unused land was mainly driven by conversions from grassland and water area. (2) The total carbon storage of the southern slope of the Qilian Mountains in 2000, 2010 and 2020 was 4.03×108 t, 4.13×108 t, and 4.22×108 t, respectively, showing an overall increasing trend. The current land use structure had higher ecological carbon sequestration efficiency than the previous structure, and the carbon sequestration level continued to rise. The conversion of unused land to grassland and water area, as well as the conversion of grassland to forest land and water area, were the main reasons for the increase in carbon storage. (3) Areas with high carbon storage on the southern slope of the Qilian Mountains were mainly distributed in the southeast, northwest, and middle and north parts of the central area, with forest land as the dominant land type. Areas with low carbon storage were mainly located in the central part of the southeast of the study area, dominated by unused land. (4) The distribution of hot and cold spots of carbon storage was closely related to land use types. Areas with high carbon storage were mainly located in forest land, while areas with lower carbon storage were mainly in water area, construction land, cultivated land, grassland, and unused land. [Conclusion] The ecosystem carbon storage on the southern slope of the Qilian Mountains shows an increasing trend, mainly driven by the conversion of land use types with low carbon density to those with higher carbon density. In the future, it is necessary to control the conversion of construction land into forest land, cultivated land and grassland with high carbon intensity, optimizing land use planning and improving regional carbon storage.
- References:
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Last Update:
2025-06-20