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Analysis of Urban Expansion and Driving Forces in xuzhou city Based on Remote Sensing

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Journal of China University of Mining and Technology 2007年第2期17卷 267-271页

作者： HU Zhao-ling DU Pei-jun GUO Da-zhi School of Urban and Environmental Science Xuzhou Normal University Xuzhou Jiangsu 221116 China School of Environment and Spatial lnformatics China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

Based on satellite remote sensing TM/ETM+ images of xuzhou city,land use forms of the city in 1987,1994 and 2000 were extracted by using a neural network classification method. The expansion contribution rate and annual expansion intensity index of each administrative district have been calculated and the contribution rate matrices and spatial distribution maps of land use changes were obtained. Based on the above analysis,the characteristics of urban expansion from 1987 to 2000 have been explored. From 1987 to 1994,the expansion contribution rate of Quanshan dis-trict reached 46.80%,the highest in all administrative districts of xuzhou city; Tongshan town was in a high-speed ex-pansion period; both Quanshan and Yunlong districts were experiencing fast-speed expansion periods while the entire city was expanding at a medium-speed with an annual expansion intensity index of 0.98; the city spread eastwards and southwards. From 1994 to 2000,the expansion contribution rate of Quanshan district reached 43.67%,the highest in xuzhou; the entire city was in a medium-speed expansion period with an annual expansion intensity index of 1.04; the city has rapidly been extended towards the southeast. According to the contribution rate matrices of land use changes,urban expansion mainly usurps cropland and woodland. A quantitative analysis found that population growth,indus-trialization and economic development are the primary driving forces behind urban expansion.

关键词： remote sensing urban expansion driving force xuzhou city

Analysis of Spatio-Temporal Changes of Land Usein xuzhou city Based on Remote Sensing

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Journal of China University of Mining and Technology 2006年第2期16卷 151-155页

作者： HU Zhao-ling DU Pei-jun GUO Da-zhi School of Urban and Environmental Science Xuzhou Normal University Xuzhou Jiangsu 221116 China School of Environmental Sciences and Spatial lnformatics. China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

Based on the satellite remote sensing TM/ETM images of xuzhou city, basic data about land use of the city from 1994 to 2000 are obtained with the neural network classification module of PCI software, and the dynamic con- version matrix of land use is thus calculated. The areas of construction land and water body have increased by 1833.93 hm2 and 804.87 hm2, respectively. On the contrary, the area of cropland has decreased by 3207.24 hm2. The area of cropland converted into construction land makes up 26.84%, and that converted into water body amounts for 8.17% of the total area of cropland in 1994. The variation index of land use degree and the dynamic degree index of land use computed are 1.38 and 57.81%, respectively, which demonstrate that land use in xuzhou is in a development period and the changes are drastic. The frequency index and importance index of the form in which cropland converted into con- struction land are 29.91% and 68.93% respectively. The results indicate that the change is not only widespread in space but a major form of spatial change of land use in the area.

关键词： remote sensing image land use spatio-temporal change xuzhou city

Environmental Effects of Groundwater Development in xuzhou city, China

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Journal of China University of Mining and Technology 2006年第1期16卷 13-16页

作者： HAN Bao-ping LIU Xi-kun ZHU Xue-qiang FENG Qi-yan SUN Xiao-fei School of Environmental Science and Spatial Informatics China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

xuzhou city is located in the most northwestern portion of Jiangsu Province, P. R. China. Karst groundwater in the Ordovician and Cambrian Limestone aquifers is the main source of water supply. There are 527 wells in urban areas to exploit the karst groundwater, yielding up to 35 000 m^3 per day. After 1978, urbanization and industrialization of xuzhou city have continued at a greatly accelerated pace; the population increased from 670 700 （1978） to 1 645 500 （2002）, its GDP from 0.71 × 10^9 $ to 42.7× 10^9 $ and the urban area from 184 km^2 to 1,038 km^2 （built-up city area from 41.3 km^2 to 81.9 km^2）. The volume of karst groundwater withdrawal increased yearly before the operation of a supply plant of surface water in 1992, from 3.85x 10^7 m^3（1978） to 1.34× 10^8 m^3 （1991） and now maintained at 0.1× 10^9 m^3 （2002）. Intensive overexploitation of karst groundwater has caused a continuous descending of the piezometric level and the area of the depression cone increases year after year. These changes have increased the vulnerability of the karst groundwater system and have induced environmental problems such as depletion of water resources, water quality deterioration, groundwater contamination and karst collapse. The largest buried depth of karst groundwater is up to 100 m in the dry season in some areas, while 66 exhausted wells have been abandoned. A change in the thickness of the unsaturated zone due to the drawdown of the piezometric level has caused a change of the chemical environment which has an impact on the physical state and major chemical compositions in groundwater. The contents of Ca^2＋, Mg^2＋, NO3^-, SO4^2- and C1^- in karst groundwater has increased significantly, total hardness （CaCO3 content） rises annually in most pumping wells and exceeds the Standard of Drinking Water of P.R. China. Point source pollution and belt-like pollution along the rivers has caused water quality deterioration. The sudden loss of buoyant support due to rapid drawdown of

关键词： xuzhou city karst groundwater vulnerability of groundwater environmental problem

Evolution Characteristics of the Ecological Space Network of Resource-Based Cities:A Case Study on xuzhou

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China city Planning Review 2021年第2期30卷 62-74页

作者： Liang Xinbin Ji Xiang Guo Nana Meng Lingran Qian Fang(Translated) Liang Sisi(Proofread) School of Mechanics and Civil Engineering China University of Mining and Technology College of Architecture Anhui Science and Technology UniversityBengbuP.R.China Jiangsu Collaborative Innovation Center for Building Energy Saving and Construction Technology XuzhouP.R.China School of Geography and Tourism Qufu Normal UniversityQufuP.R.China 不详

The territorial and spatial planning is an essential tool for ecological civilization construction in spatial development and urban *** ecological space has been an important part of the territorial and spatial planning,this study established a spatial structural pattern of"ecological source-ecological corridor-ecological node"along with methods including landscape connectivity analysis and ecological resistance surface *** the ecological space of xuzhou city,a typical resource-based city,as a case study,this research analyzed the ecological spatial network structure and evaluated the evolution characteristics before judging the breadth threshold value of the ecological corridor and providing planning control *** study found that since the urbanization of xuzhou city resumed its growth,the quantity of ecological sources,corridors,and nodes have grown *** resistance of the ecological corridor increases year by year,with the proper breadth threshold value around 100–200 *** development of an ecological network structure shows a single-polarization evolution characteristic that is high quality and high resistance.

关键词： ecological space landscape connectivity ecological resistance surface ecological space network structure ecological corridor xuzhou city