Unplanned urbanization has caused serious ecological imbalances in Dhaka city. This study investigates the efficiency and utilization of urban green space especially parks of Dhaka city. The case study site covers urb...Unplanned urbanization has caused serious ecological imbalances in Dhaka city. This study investigates the efficiency and utilization of urban green space especially parks of Dhaka city. The case study site covers urban parks of Dhaka metropolitan area of Bangladesh. Two aspects （physical and social） were applied for this study. For physical aspect, methods were used RS （Remote Sensing） and GIS （Geographic Information System） of three periods of images （Dhaka city）. And for social aspect, methods were used questionnaire survey, observation, photographs, sketch and previous information about parks. After calculating all data result was showed by maps using GIS. For the changing pattern of green space of periods 1972, 1989 and 2010, result showed that the variation of the green space changes rate was high and gradually green space deceased and build up area increased in Dhaka city. Again according to physical size, parks of Dhaka city were classified into four types： Small, Medium, Large and Extra Large parks. Small parks of Dhaka city were situated beside the residential area and were used as daily purpose. Medium parks were located beside commercial area and its use was for daily and weekly. Large parks were placed at city center and only one extra large park was found outer range of city area. In large parks, people mainly visited monthly or occasionally. Moreover, the spatial-temporal changes of images showed the present status of green space of the city. The consequence of the study reveals that the utilization of park was controlled by various factors in Dhaka city.展开更多
As social and economic dynamics continue to evolve and the demand for companionship increases,pet ownership has become an increasingly popular lifestyle choice.Pet parks,as a new form of urban public space,are gaining...As social and economic dynamics continue to evolve and the demand for companionship increases,pet ownership has become an increasingly popular lifestyle choice.Pet parks,as a new form of urban public space,are gaining significant attention.This study,grounded in the theory of spatial justice,employs a combination of questionnaires and semi-structured interviews to evaluate four representative pet parks in Hong Kong,China.It explores how pet parks,as inclusive green infrastructure in high-density environments,contribute to urban community well-being and broader spatial justice.The study reveals the conflicts between pet owners and non-pet owners regarding the rights to use public spaces,examining how to guarantee the spatial rights of specific groups while avoiding harm to others.The findings indicate that green space availability,sociability and participation,walkability,safety,and flexibility in pet parks play a positive role in achieving urban spatial justice.However,pet parks also face challenges related to social exclusion and safety,requiring a balance between promoting community integration and ensuring public safety.This study offers valuable insights for the development of pet parks,the creation of vibrant and diverse public spaces,and the promotion of harmonious human-animal environments in cities across China and other Asian countries.展开更多
Exploring the scale-effect of different land use types on the distribution pattern of urban park green space(PGS)at multiple grid scales would inform rational allocation and efficient collaborative construction of urb...Exploring the scale-effect of different land use types on the distribution pattern of urban park green space(PGS)at multiple grid scales would inform rational allocation and efficient collaborative construction of urban development land at different scales.Selecting 300-m,500-m,1,000-m,and 2,000-m grid scales,the research employed Create Fishnet tool in ArcGIS and Geodetector to construct a scale-effect analysis framework that revealed the scale-effects of different land use types on the distribution pattern of PGS at multiple grid scales in the main urban area of Nanjing,China in 2006,2012,and 2017.Main research results are:1)the overall distribution pattern of PGS showed the evolution characteristics from polarization to advancing quality and efficiency,while the trend gradually weakened with the increase of grid scale;2)the scale-effect of other land use types on PGS increasingly enhanced-the larger the grid scale,the more obvious the synergistic or compressive effect;3)the interactive scaleeffects of different land use types gradually enhanced-the larger the grid scale,the more significant the overall factor interaction;and 4)at the 300-m grid scale,the major interaction factors were residential,transportation,industrial/manufacturing,water area,and administration/public services,which gradually changed to residential,water area,and administration/public services up to the 2,000-m grid scale.The findings of this paper are expected to deepen the theory of the coupling between PGS and other land use types,as well as provide scientific support and a basis for efficient allocation,spatial layout optimization,and sustainable development of urban spaces.展开更多
By measuring the concentration of air anions, thermal-temperature, tree-coverage and bio-diversity in major city greenbelt in Shanghai, this paper analyzed thecorrelativity between air cleaning index and its influenti...By measuring the concentration of air anions, thermal-temperature, tree-coverage and bio-diversity in major city greenbelt in Shanghai, this paper analyzed thecorrelativity between air cleaning index and its influential factorsof thesecity greenbelt, and found that less than 60% of parks’ concentration of air inions anions arrived at the general level. There is negative correlation between CI(air clean index) and thermal- temperature, and there is negative correlation between CIand bio-diversity too. Thereis Positivecorrelation between CI and tree-coverage.展开更多
文摘Unplanned urbanization has caused serious ecological imbalances in Dhaka city. This study investigates the efficiency and utilization of urban green space especially parks of Dhaka city. The case study site covers urban parks of Dhaka metropolitan area of Bangladesh. Two aspects （physical and social） were applied for this study. For physical aspect, methods were used RS （Remote Sensing） and GIS （Geographic Information System） of three periods of images （Dhaka city）. And for social aspect, methods were used questionnaire survey, observation, photographs, sketch and previous information about parks. After calculating all data result was showed by maps using GIS. For the changing pattern of green space of periods 1972, 1989 and 2010, result showed that the variation of the green space changes rate was high and gradually green space deceased and build up area increased in Dhaka city. Again according to physical size, parks of Dhaka city were classified into four types： Small, Medium, Large and Extra Large parks. Small parks of Dhaka city were situated beside the residential area and were used as daily purpose. Medium parks were located beside commercial area and its use was for daily and weekly. Large parks were placed at city center and only one extra large park was found outer range of city area. In large parks, people mainly visited monthly or occasionally. Moreover, the spatial-temporal changes of images showed the present status of green space of the city. The consequence of the study reveals that the utilization of park was controlled by various factors in Dhaka city.
文摘As social and economic dynamics continue to evolve and the demand for companionship increases,pet ownership has become an increasingly popular lifestyle choice.Pet parks,as a new form of urban public space,are gaining significant attention.This study,grounded in the theory of spatial justice,employs a combination of questionnaires and semi-structured interviews to evaluate four representative pet parks in Hong Kong,China.It explores how pet parks,as inclusive green infrastructure in high-density environments,contribute to urban community well-being and broader spatial justice.The study reveals the conflicts between pet owners and non-pet owners regarding the rights to use public spaces,examining how to guarantee the spatial rights of specific groups while avoiding harm to others.The findings indicate that green space availability,sociability and participation,walkability,safety,and flexibility in pet parks play a positive role in achieving urban spatial justice.However,pet parks also face challenges related to social exclusion and safety,requiring a balance between promoting community integration and ensuring public safety.This study offers valuable insights for the development of pet parks,the creation of vibrant and diverse public spaces,and the promotion of harmonious human-animal environments in cities across China and other Asian countries.
文摘Exploring the scale-effect of different land use types on the distribution pattern of urban park green space(PGS)at multiple grid scales would inform rational allocation and efficient collaborative construction of urban development land at different scales.Selecting 300-m,500-m,1,000-m,and 2,000-m grid scales,the research employed Create Fishnet tool in ArcGIS and Geodetector to construct a scale-effect analysis framework that revealed the scale-effects of different land use types on the distribution pattern of PGS at multiple grid scales in the main urban area of Nanjing,China in 2006,2012,and 2017.Main research results are:1)the overall distribution pattern of PGS showed the evolution characteristics from polarization to advancing quality and efficiency,while the trend gradually weakened with the increase of grid scale;2)the scale-effect of other land use types on PGS increasingly enhanced-the larger the grid scale,the more obvious the synergistic or compressive effect;3)the interactive scaleeffects of different land use types gradually enhanced-the larger the grid scale,the more significant the overall factor interaction;and 4)at the 300-m grid scale,the major interaction factors were residential,transportation,industrial/manufacturing,water area,and administration/public services,which gradually changed to residential,water area,and administration/public services up to the 2,000-m grid scale.The findings of this paper are expected to deepen the theory of the coupling between PGS and other land use types,as well as provide scientific support and a basis for efficient allocation,spatial layout optimization,and sustainable development of urban spaces.
文摘By measuring the concentration of air anions, thermal-temperature, tree-coverage and bio-diversity in major city greenbelt in Shanghai, this paper analyzed thecorrelativity between air cleaning index and its influential factorsof thesecity greenbelt, and found that less than 60% of parks’ concentration of air inions anions arrived at the general level. There is negative correlation between CI(air clean index) and thermal- temperature, and there is negative correlation between CIand bio-diversity too. Thereis Positivecorrelation between CI and tree-coverage.
