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《Research of Soil and Water Conservation》 2018-03
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Analysis on Carbon Storage Change of Construction Land Expansion in Chongqing Based on InVEST Model

HU Shuai;ZHANG Xueru;GUAN Dongjie;Chongqing Jiaotong University;  
The expansion of construction land is an important driving factor affecting the change of carbon storage in terrestrial ecosystem.Based on Chongqing land use data,soil data,vegetation data,from the perspective of expansion of construction land,we use InVEST model and combine with the collected carbon density data to analyze the changes in carbon stocks in Chongqing City in 2000,2005 and 2010.The results show that the land use change is significant from 2000 to 2010,and the construction land is the main entrant,with a total growth of 1 505.58 km~2.Among them,more than 90% of the area comes from cultivated land and broad-leaved forest,resulting in a net carbon loss of 1.796 Mt.From 2005 to 2010,the construction land in Chongqing changed more intensely,the construction land expanded by 998.19 km~2.Construction land mainly expanded from the western center,gradually to the surrounding area,and the growth rate accelerated.The construction land increased from 598.88 km~2 in 2000 to 1 097.27 km~2 in 2005,and the total carbon storage decreased by 1 169 982.18 tons.The carbon loss of broad-leaved forest reached to 72%.In2010,the construction land increased to 2 095.46 km~2,expansion occurred in broad-leaved forest,expansion led to the reduction of total carbon stocks of 1 169 982.18 tons.It can be seen that the main sources of carbon loss during the expansion of construction land are cultivated land and broad-leaved forest,and followed by coniferous forest,grassland and grassland.Construction land expansion targeting the bare land and the meadow with weak carbonsequestration are beneficial to the protection and growth of carbon storage in Chongqing.
【Fund】: 国家自然科学基金(41501202);国家自然科学基金(41501202);; 上海市城市化生态过程与生态恢复重点实验室开放基金(SHUES2012A04);上海市城市化生态过程与生态恢复重点实验室开放基金(SHUES2012A04);; 国家社科基金后期资助项目(16FJY010);; 重庆市基础科学与前沿技术研究项目(cstc2017jcyjAX0210)
【CateGory Index】: X24
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