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A Research on the Relationship between Regional Economic Transition to Low-carbon and Land Use Structure Optimization

Author: YangHongYu
Tutor: JianJun
School: Southwestern University
Course: Human geography
Keywords: Low-carbon economy Land Use Structure Carbon budget Net primary productivity Diversified structure coefficients Chongqing
CLC: F301
Type: Master's thesis
Year: 2011
Downloads: 312
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Abstract

The low-carbon economy is a trend for the future economic development, and its essence is to reduce energy consumption and reduce emissions, improve energy efficiency, promote energy and low-carbon development. With the increase in the global population, land use caused by human use of land cover changes even more quickly, and thus have a greater impact on the surrounding environment. Land use and land cover change, not only directly or indirectly affect the carbon cycle of terrestrial ecosystems, but also the gas exchange between terrestrial ecosystems and the atmosphere changes. Therefore, the carbon balance of payments research, in order to reduce the imbalance in the global carbon budget, the urgent need to clarify the regional or global scale cover change and its impact on the carbon balance of payments. According to the Chongqing carbon sequestration and release the amount of carbon quantitative results, the release of the regional carbon intensity, temporal and spatial variation and its causes. By the evolution of land use structure, the analysis of the evolution of the economic structure and energy consumption structure evolution process to determine between economic growth and ten use diversifying the structure of the evolution of the degree of energy consumption growth and economic diversification of the evolution of the extent and carbon emissions and energy structural changes The correlation coefficient. Markov model to simulate land use structure in Chongqing in 2020, combined with the current countries to develop energy-saving emission reduction targets, forecasting Chongqing 2020 carbon emission and diversifying the structure coefficient. This emission reduction targets as constraints to optimize land use structure. The main conclusions of the paper are: (1) Chongqing 2000-2009 carbon emission gradually increased carbon sequestration of carbon sequestration is far lower than the carbon emission, the regional distribution is extremely uneven. The 2000-2009 Chongqing release carbon growth in the amount of 135 times the amount of net carbon sequestration growth, release carbon capacity far exceeds its carbon sequestration capacity. The net release of carbon amount of average annual growth rate of 19.05%, but also 15 percent higher than the annual growth rate of the total amount of carbon release. From the temporal and spatial distribution of carbon release around the main city constantly expand outwards, and each county is quite different carbon release, carbon emission can be 40 districts and counties are divided into net carbon fixed county and net carbon release counties two groups. Net carbon fixation capacity in 2000 is larger than the net release of capacity 18 counties, mainly located in the northeast of Chongqing and eastern Chongqing Nan Senlin more developed areas. Net carbon fixation capacity is greater than the net release of the ability of counties to be reduced to 14 by 2005. 2009 net carbon fixation capacity greater than the net release seven counties only. (2) With the evolution of industrial structure and production technology advances, Chongqing carbon emission per unit of GDP 10 years of a downward trend. All districts and counties unit GDP carbon emission spatial pattern of evolution has accelerated noticeably, the type of development has stabilized. Total carbon emission from per unit of GDP, the Chongqing unit GDP resource consumption required to continuously reduce. The view from a net carbon emission per unit of GDP, the net amount of carbon released Chongqing unit GDP first increased and then decreased. From the spatial distribution per unit of GDP, the 2000 nine districts of the main city in Western Part per unit of output of carbon emissions is insignificant, all districts and counties in the northeast of Chongqing, Chongqing southeast of carbon emission per unit of GDP is extremely uneven. Unit GDP carbon emission to 2005, all districts and counties are in decline, less than two tons of counties from 18 to 26. By 2009, the county unit GDP carbon emission spatial pattern evolution has accelerated noticeably stabilized type development. Compared to 2005, carbon emission per unit output value is less than 2 tons = County increased to 32. (3) Land Use Structure Evolution and economic structure evolution rate consistent energy structure evolution rate is more gentle. Chongqing the diversified structure evolution analysis found: the rate of evolution of land use structure is significantly accelerated. Agricultural land area is gradually reduced in significantly accelerate the growth rate of the construction land area; based on the ESD value, Chongqing City has entered the industrial age, but the value of the ESD is far less than the average of developed countries, the diversified industrial structure with the Chongqing liter high primary energy consumption growth rate showed the trend of first increased and then decreased; Chongqing EUSD less than 2, the difference is very obvious with the developed countries, carbon emissions growth also increased and then decreased variation. (4) regulation of land use systems management, optimize the structure of land use, the key to effective control of all kinds of solid carbon ground and release carbon ground. Found through the land use structure prediction: reducing the area of ??arable land, pasture and other agricultural land to agricultural land in 2020, Chongqing, there are varying degrees of rose garden and woodland; structural changes in the process of construction land, residential and industrial land, traffic land and water conservancy facilities, land area has increased, unused to decelerate faster. Determine ELSD = 4.26, ESD = 17.89, and the the EUSD = 1.32. Through the adjustment of agricultural structure, wasteland reclamation of unused land development and other measures to strengthen the potential development of new arable land, arable land quantity and quality of dynamic equilibrium. Enhance the carbon sink function must increase net carbon fixed amount of forest land, the appropriate optimization forest structure, increase the Mixed coniferous broad-leaved and coniferous forest, the the shrub forest Casuarina equisetifolia average net production is higher vegetation coverage area, this to reduce the net emission of CO2 in the atmosphere. By rational distribution of the residential area, the focus on the construction of the industrial park, rational planning of transportation land, prompting the construction land from extensive to intensive, saving development.

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