This paper intends to investigate the urban spatial patterns of hubei Province and its evolution from three different perspectives: urban nodes, urban connections and urban clusters. The research adopts nighttime ligh...
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This paper intends to investigate the urban spatial patterns of hubei Province and its evolution from three different perspectives: urban nodes, urban connections and urban clusters. The research adopts nighttime light imagery of cities in hubei Province, the viewpoint of ′point-axis-area′ in the ′point-axis system′ theory, and employs light index model, gravity model and social network analysis. The findings are as follows: 1) In terms of urban nodes, the urbanization process of hubei has been carried out mainly on the basis of external expansion rather than internal increasing. The polarization trend of urban connection network is strengthening. 2) As for urban connections, the estimation of urban connections using light index model is capable of containing various actual flow, and the connections are getting increasingly closer. 3) In regard to urban groups, seven urban groups of varying sizes have formed. On that basis, three stable and relatively independent urban groups as the centers, namely Wuchang, Yichang and Xiangyang emerge as well. But the structures of ′Wuhan Metropolitan Area′, ′Yichang-Jingzhou-Jingmen City Group′ and ′Xiangyang-Shiyen-Suizhou City Group′, which are defined by local development strategy in hubei Province, are different from the above three urban groups.
According to the data analyses of the output and disposal volume of hazardous waste in Wuhan from 2010 to 2015, it turns out to be rising and the main disposal method to deal with the hazardous waste is burning. The h...
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According to the data analyses of the output and disposal volume of hazardous waste in Wuhan from 2010 to 2015, it turns out to be rising and the main disposal method to deal with the hazardous waste is burning. The hazardous waste disposal relies on the ability of the disposal center in Wuhan. The key burning technology of hazardous waste is elaborated using the compound mode of rotary kiln and mechanical grate in the research.
In this research we presented a novel method to address the issue of urbanization process from time-series MODIS products. By employing a metrics, a phenological parameter extracted from time-series MODIS data and the...
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In this research we presented a novel method to address the issue of urbanization process from time-series MODIS products. By employing a metrics, a phenological parameter extracted from time-series MODIS data and the advantages of MODIS data with high temporal resolution and intermediate spatial resolution, a remote sensing based model for mapping urban dynamics in Wuhan city was built through integration with Landsat images and land-cover data. First, a phenological parameter, amplitude was derived from time-series MODIS EVI data. Next, linear regression was performed on the time-series amplitude to figure out the trend of land-cover changing into built-up areas. Finally, the urbanization trend of urban cores in Wuhan was extracted and analyzed. Our study indicates that the proposed method can be efficiently applied for the monitoring of urban dynamics.
Spatially explicit modeling techniques recently emerged as an alternative to monitor land use changes. This study adopted the well-known CLUE-S(Conversion of Land Use and its Effects at Small regional extent) model to...
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Spatially explicit modeling techniques recently emerged as an alternative to monitor land use changes. This study adopted the well-known CLUE-S(Conversion of Land Use and its Effects at Small regional extent) model to analyze the spatio-temporal land use changes in a hot-spot in Northeast China(NEC). In total,13 driving factors were selected to statistically analyze the spatial relationships between biophysical and socioeconomic factors and individual land use types. These relationships were then used to simulate land use dynamic changes during 1980–2010 at a 1 km spatial resolution,and to capture the overall land use change patterns. The obtained results indicate that increases in cropland area in NEC were mainly distributed in the Sanjiang Plain and the Songnen Plain during 1980–2000,with a small reduction between 2000 and 2010. An opposite pattern was identified for changes in forest areas. Forest decreases were mainly distributed in the Khingan Mountains and the Changbai Mountains between 1980 and 2000,with a slight increase during 2000–2010. The urban areas have expanded to occupy surrounding croplands and grasslands,particularly after the year 2000. More attention is needed on the newly gained croplands,which have largely replaced wetlands in the Sanjiang Plain over the last decade. Land use change patterns identified here should be considered in future policy making so as to strengthen local eco-environmental security.
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