Study On Land Use Carbon Emission In Qinzhou

With the development of social economy,carbon emissions caused by human activities continue to rise and become the main factor of climate change.The use of land for production and living activities is an important factor affecting carbon emissions,so strengthening land use management and regulation is one of the effective ways to achieve a low-carbon economy.As a key city of national and Guangxi’s development,the research on land use change and carbon emission is of great significance for Qinzhou to achieve the goal of low-carbon economic development.Based on the technology of GIS and e Cognition,interpretate 2003,2010 and2019 remote sensing image of Qinzhou to establish a classification system and build Qinzhou carbon emissions from land use database and then analyze the land use present situation of extraction of Qinzhou.Then,analyze spatio-temporal changes of land use of Qinzhou to analyze the carbon emissions effect of land use of Qinzhou.Last,,factors influencing the carbon emission of land use in Qinzhou were selected from population,economy,energy consumption and energy structure,so as to put forward optimization suggestions for the low-carbon economic development and ecological civilization construction of qinzhou city.The main conclusions are as follows:(1)From 2003 to 2019,with the development of social economy,the area of forest land and construction land in the city showed an increasing trend,and the proportion increased.During the period from 2003 to 2010,the growth rate was relatively fast and the increment was relatively large.Meanwhile,the proportion of other land areas decreased due to the decrease of construction occupation.(2)From 2003 to 2019,with the continuous increase of construction land,the carbon emission of land use in the whole city showed a trend of continuous growth.The increase at the end of the period was about 3 times of the initial amount,and the carbon emission intensity of the city’s average carbon emission intensity and the average carbon emission intensity of the city’s average construction land showed a trend of growth,increasing from 1.10t*hm2 and 15.95t*hm2 to 4.23t*hm2 and62.67t*hm2,respectively.Under the influence of landform and economic development level,lingshan county is the heavy land-use carbon emission zone,medium and light emission zone is concentrated in qinnan district and qinbei district,and pubei county is the micro emission zone.(3)Affected by the policy,the population size effect on the carbon emissions of Qinzhou is relatively low from 2003 to 2019.When per capita GDP shows an increasing trend,economic development has a great influence.At the same time,in the city’s per unit GDP energy consumption decline trend,energy consumption intensity on carbon emissions inhibition.Reducing the intensity of the energy structure plays a promoting role in reducing carbon emissions.Decomposition factors of carbon emissions in different regions show different differences and fluctuations,among which qinnan district and lingshan county have a strong impact on carbon emissions.(4)According to the optimization model,the land use structure is 73457hm~2for construction,213931.8hm~2for cultivated land,639294.4hm~2for forest,79968.16hm~2for grassland,67093.94hm~2for water and 15798.73hm~2for unused land.According to the change of land use and carbon emission in qinzhou city,the following optimization Suggestions are put forward:Optimiz Iing land use structure and reduce carbon emissions;adjusting the energy utilization structure and improve the energy efficiency;developing competitive industries and close down backward production facilities;giving play to the role of the market in guiding enterprises to take the initiative in reducing emissions;decompose emission reduction targets according to regional differences.