Based on the current land uses of 2005 and 2015 in Dongying City, this study obtained the spatial-temporal variation matrix of land use of the two periods with the overlay function in ArcGIS 10.2. The analysis results showed as follows: 1-Agricultural area decrease a little. 2-The urban land area had increased greatly. 3-Coastal aquaculture area increase a lot. The main driving factors were: 1-The policy of farmland protection was carried out in Dongying City. 2-Dongying City economic has developed rapidly in recent 10 years. 3-Driven by higher economic profits. The conclusions were meaningful for the reform of land use structure and the reform of economic structure in the future in Dongying City.
Based on the data of Landsat remote sensing images in 2005 and 2015 in Weihai City, this paper referenced China coastal zone land use classification system and used the Arcgis10.2 software to construct the land use database by visual interpretation , and then analyzed the spatial and temporal changes of land use in Weihai City for 10 years. The results showed that: (1) The total area of the land use in Weihai City had been enlarged, mainly by mariculture expansion with land area of 11.3 thousand hectares.(2) The land use changing rates were fast, among which the unused land attitude was the largest at 24.85%.(3) The area of these land uses change was increased, which are forest land, urban construction land and the independent industrial and mining and traffic construction land. While the arable land and grass land areas decreased. (4) The main driving forces were its economic development and its national economic and social development planning. May this paper provide some references to its regional land use sustainable development.
With the fast development of economy and urbanization, the phenomenon of city construction occupying Cropland often happens. As the contradiction between human and land becomes more prominent, the contradiction between the supply and demand of the cropland are more radical in Yantai City of China. Analysis on the balance between supply and demand of cropland is the main basis to determine land use objectives, and also the basis of editing land use planning. In this paper, the authors firstly calculated the potential of cropland supply in Yantai for 2020 according to its current number of the cropland and the potential quantity of other kinds of land changing to the cropland, and then calculated the demand for cropland in 2020 with the methods of the population prediction and its national economic development planning. Then the balance between the supply and demand of cropland was analyzed. The results were that the cropland in Yantai city in 2020 were lower than those of its demand. At last, to relieve the contradiction, the authors tried to put forward some recommendations like optimizing the structure to coordinate the balance between the supply and demand of the cropland etc. to realize its regional sustainable development.
This article firstly calculated China's energy carbon emissions of 30 provinces in 2010 with the method of carbon emission inventories of 2006 IPCC based on the data of China energy statistical yearbook, and then calculated its carbon emission intensity with GDP data in China’s statistical yearbook. Next according to the formed formula the author calculated the EEI (Economic Efficiency Index) and ECI (Ecological Carrying Index) and made some corresponding figures with the help of GIS to analyze the fairness of the China’s energy CO2 emissions in 2010.The results showed that the distribution of China’s CO2 emissions for energy in 2010 become lower from the Bohai bay to the surroundings and the west circle provinces are with the lowest energy carbon emissions. The intensity distribution of China’s CO2 emissions for energy in 2010 becomes higher from southeast China to north China. The distributions of EEI, ECI and for China’s energy CO2 emissions are quite different from each other, and also with their comprehensive result. As to the fairness of China’s energy CO2 emissions in 2010, we can say that the south provinces are better than those of Bohai bay areas (except Beijing and Tianjing).
Based on the quantitative calculation of 2000-2010 China's 30 provinces of carbon emissions by the method of 2006 IPCC with the data from China energy statistical yearbook and China cement Yearbook, a detailed analysis of the temporal and spatial variation characteristics of carbon emissions in both Chinese level and provinces’ level was made. The result showed that most of the provinces of China's carbon emissions presented an increasing trend in the past 11 years, especially in Shandong Province, Hebei Province, Shanxi Province, Liaoning Province, Jiangsu province which is located in the national top five. Then according to the current carbon emissions trend, the author put forward some countermeasures for China, such as speeding up the pace of industrial restructuring, searching for clean energy and other measures to reduce the carbon emissions of china to low the emission rate and contribute to the world.
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