关键词: 碳储量, 土地利用变化, InVEST模型, 乌江流域

Abstract: [Objective] The aim of the study was to explore the effects of land use change on carbon storage at watershed scale. [Method] Based on the land use data of 2000 and 2010, the spatiotemporal variations of carbon storage in Wujiang river basin from 2000 to 2010 using the InVEST model. [Results] The results showed that:① Paddy field and dry land were reduced sharply while evergreen broad-leaved forest, deciduous broad-leaved forest, grassland and construction land were increased dramatically. The conversions from paddy field to construction land or conversions from dry land to evergreen broad-leaved forest, deciduous broad-leaved forest, grassland and construction land were obvious. ② Carbon storage in the whole basin was increased by 4.11%(from 1302.72×10⁶t in 2000 to 1356.31×10⁶t in 2010). Evergreen broad-leaved forest, deciduous broad-leaved forest, shrubbery and dry land played important roles in carbon storage in the whole basin. Carbon storage for evergreen broad-leaved forest, deciduous broad-leaved forest, shrubbery and grassland was increased but carbon storage of theropencedrymion, paddy field, dry land and unused land was declined. Carbon storage was high in north and southeast parts. However, carbon storage was low in northeast and south central parts. Carbon storage declined in south and central parts but increased in other parts. [Conclusion] The Grain-for-green project and rapid urbanization are the main factors affecting the variations of carbon storage in Wujiang river basin.

Key words: carbon storage, land use change, InVEST model, Wujiang river basin