دانلود رایگان مقاله انگلیسی ارزیابی و بهینه سازی فضای سبز برای دگرگونی شهر در شهر منابع محور - Lengshuijiang، چین - الزویر 2018

ABSTRACT

Urbanization in China has changed gradually from production-oriented to consumption-oriented in recent years. Comfort and accessibility of green infrastructures effect the rate of urbanization and transformation. A well designed urban green space system is an essential part of the urbanization process. In this paper, the urban green space of Lengshuijiang city was assessed both qualitatively and quantitatively using data of field survey and high resolution remote sensing. In the study area, green space coverage was 37.14%, green space percentage was 33.45% and per capita park green space was 16.25 m2 . The high green space coverage suggested that there were ample potentials for further urban transformation. Within a 30 min service radius of existing green space, total service area was 204.49 ha, which accounted for 16.26% of the study area. A high proportion of the green space was made up of urban parks which were unevenly distributed across the study area. A green space optimization strategy, aimed at improving green space quality and accessibility, was proposed. After optimization, total service areas within the 30 min service radius will increase to 492 ha (39.12%), an increase of 22.86%. Our study demonstrated that combining qualitative and quantitative methods is an effective and reliable way for green space assessment and reliable and can be used for urban green space planning and management for small resource-based cities like Lengshuijiang in its process of urban transformation.

5. Conclusion

In this study, we used remote sensing technology to analyze the urban green space composition and urban park accessibility of Lengshuijiang city. Our results showed that green space coverage was 37.14%, green space percentage was 33.45%, and per capita park green space was 16.25 m2 . Compared with other cities after the urban transformation, the green space area of Lengshuijiang city was relatively large and there was ample potential in improving the urban environment for urban transformation. Green spaces were not uniformly distributed across the city. Much of the green space was made up of recreational parks and there was generally a lack of protective green space. The service quality of urban parks was lowered by traffic problems. Based on the above analysis, the optimization measures of “increasing the size and improving the environment quality” and “increasing center and corridor” were proposed. In order to regulate the area of each green space, the optimization measures should be taken in the revetment of Lianxi River to improve the landscape and ecological quality. Moreover, increase the number of park entrances and construction of greenway corridors could improve the urban park service. After optimization, the service area of 0–30 min almost covered the entire Lengshuijiang city, and the service area of 0–5 min increased notably.