Assessment of Carbon Reserves in Nanchang City, Jiangxi Province, Using the InVEST Model

Abstract

This study depends on the dynamic index of land use change and land transfer matrix, as well as the carbon module in the InVEST model. The features of land use change and carbon reserve change in Nanchang city from 2001 to 2021 were investigated, and the influence of land use change on carbon reserve was identified. The results show that, from 2001 to 2021, the area of cultivated land, water area, grassland, and bare land in Nanchang City decreased while the area of construction land and forest land increased. Under the influence of land use changes, the high-value areas of carbon reserves are mostly distributed in forest areas, including the northwest and southeast parts of Nanchang, whereas the low-value areas are mostly distributed in urban construction areas, including the central part of Nanchang, which is consistent with the current situation of urban land types. Overall, the carbon reserves of Nanchang City decreased from 2001 to 2021, primarily due to the decrease of cultivated land and the increase of construction land.