Tab.1 Information of universities in Higher Education Mega Center HEMC of Guangzhou

Transcription

1 P935.1 A

2 1 Tab.1 Information of universities in Higher Education Mega Center HEMC of Guangzhou

3 Tab.2 Major construction projects in HEMC during

4 表 年研究区土地利用变化情况 Tab.3 Land use change of HEMC during 大学城及周边用地问题分析及展望

5 2005 年 2009 年 2005 年 Fig.1 SPOT image of HEMC in 2005 and 年 Fig.3 Land use classification of HEMCduring Fig.2 Land use classification of HEMC and its surroundings during Fig.4 Land use change detection of HEMC during Fig.5 Current land use situation of HEMC and its surroundings in 2009

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7 Spatio-temporal Changes of Land Use in Guangzhou HEMC and Its Surroundings LIU Jiaxing CHEN Jianfei School of Geographical Sciences Guangzhou University Guangzhou China Abstract: The Higher Education Mega Center (HEMC) in Guangzhou was built and put into service in In this paper the land use changes in the HEMC and its surrounding areas is studied with high-resolution remote sensing data SPOT5 from 2005 to 2009 as the main data sources, while RS and GIS technologies are used to classify the land use types. More attention is paid to the land use changes of the built-up areas, bare land and green land as well as the changes of vegetation cover, and further analysis on land use changes of the areas around the central lake within 7 km is conducted. The results show that, in the built-up areas of the HEMC, teaching, laboratory, dormitory and administrative buildings and the roads had been completed in 2005, then facilities of business services, housing and sports etc. were built in succession. Until 2009, in addition to that for some new approved residential buildings, most of the remaining land had already been developed. Built-up areas and green areas increased rapidly, while the bare land continued to decline. Meanwhile, the areas under construction significantly reduced. Moreover, obvious changes of land use have taken place along the traffic axial lines around HEMC. Key words: LUCC SPOT Higher Education Mega Center of Guangzhou Effects of Land Use Change on Ecosystem Service Value of the Pearl River Delta YE Changsheng 1,2,DONG Yuxiang 1 (1.Center for Land Research,School of Geographic Science and Planning,Sun Yat-sen University,Guangzhou ,China; 2.School of Geosciences,East China University of Technology,Fuzhou ,China) Abstract: The land use change and its effects on ecosystem service value (ESV) in the rapidly developed region of the Pearl River Delta from 1990 to 2006 are analyzed, and the relationship between ESV and land use structure is researched. The methods used in the paper are based on the ESV computing formula and ESV coefficients of the land ecosystems in China advanced by Xie Gaodi et al. The results show that: from 1990 to 2006, the area of cultivated land and forests decreased evidently, while construction land and water bodies increased intensively, other land use types slightly increased. The area of the changed land accounted for 29.38% of the total land area. Cultivated land was mainly turned into construction land, water bodies and forests. As the value coefficients of water bodies were comparatively big, the increment in water bodies, to a certain degree, offsetted the total decrement in regional ecosystem service values due to the decrease of the area of cultivated land and forests, and so the total ESV of the Pearl River Delta only reduced a little, namely, from RMB to RMB in the period, or a 3.19% decrease for the studied region. The difference of the per unit ESV between different areas was obvious, and it still continued expanding. In 1990, the biggest unit ESV, which was yuan/km 2, was in Shunde, while the smallest, yuan/km 2 ; in Foshan District. In 2006, the biggest, yuan/km 2, in Sanshui, while the smallest, yuan/km 2, in Foshan District. The per unit ESV had significant relation to the percentage of the area of construction land, forests and cultivated land. The decrease of the ecosystem service values was mainly responsible to the dramatic expansion of construction land and the reduction of forests and cultivated land. Key words: land use; ecosystem service value; land use structure; the Pearl River Delta