Carbon Emission Efficiency And Low-carbon Optimization Study Of Land Use

Industrialized era of energy use contribute to global climate warming,the global climate warming causes the frequency of extreme weather,climate security become the greatest threat to human survival and development,how to reduce CO2 emissions in the process of construction to become an international focus.The economic development of our country is in growth,coal is the main energy consumption in our country,China's CO2 emissions is far higher than the rest of the world.As one of the important factors of production,land directly involved in production and construction process,the rational utilization of land resources to slow global warming,and promote China's economic and social sustainable development,has great significance to realize the policy layout.In this paper,the arable land,construction land are carbon emissions land,forest land,garden land,water and other land are not.On the basis of social ecosystem theory,ecological engineering cycle theory,sustainable development theory and the low carbon economy theory,the land use carbon emission coefficient method and the method to estimate the energy consumption in the study area land use carbon emissions,set up three kinds of carbon emission evaluation index,and then by linear programming method to construct model,to solve the target in low carbon the land use structure,and on this basis,the model using CLUE-S goal in low-carbon land structure space visual configuration,with Shenzhen as an example for empirical study,the final low carbonization puts forward related suggestions of land use of Shenzhen in the future,in order to provide the basis for the city's ecological development of Shenzhen.In this paper,the main research results are as follows:(1)According to data of land use change of Shenzhen in nearly five years,construction land is the main land use type,and the existing construction land area close to half of the total area of the land of Shenzhen;Followed by woodland(29%),orchard(10%),water(8%),other land(3%),forest land,garden land,the land for other three area overall showed a trend of decreasing year by year;Proportion of arable land quantity is the least in five years,and the existing area accounted for only 2%of the total area.(2)The land use carbon emissions in Shenzhen is growing in 2010-2015.Arable land and construction land are the main carbon classes,construction land plays an important role,It's the most carbon emissions land in the class of land use types;Forest land,garden land,water and other land for carbon absorption,woodlands and gardens are the main carbon absorb classes,playing an important role in the aspect of reducing carbon emissions.(3)Low carbon number of land use structure of Shenzhen in 2020 is 4288 hectares of arable land,97600 hectares of construction land,59175 hectares of garden land,20689 hectares of forest land,14132 hectares of water area,4657 hectares of other land.After the optimal linear programming in 2020,Shenzhen land use carbon emissions is 5.456217 million tons,down about 44.13%than that of natural growth condition.(4)1n 2020,the low carbon number of land use spatial configuration diagram of Shenzhen shows:Arable land on the original distribution to the surrounding flat area low-rising expansion;Part of the mountain to the south peninsula internally by city construction land periphery metastasis;Higher ground area increase,woodland area within cities in southern peninsula flat peripheral exit;Garden low carbon distribution characteristics is not obvious,reservation status quo distribution characteristics;The west coast waters land has decreased,and the city interior part of the reservoir area has a declining trend;Other land is nearby other land use types of assimilation,transfer or forest land to construction land.