This paper elaborated natural conditions of Dali City,jurisdictions which included 2 offices,2 towns,89 village offices and 429 natural villages,and planning scope which contained the precinct area of Dali City and co...This paper elaborated natural conditions of Dali City,jurisdictions which included 2 offices,2 towns,89 village offices and 429 natural villages,and planning scope which contained the precinct area of Dali City and covers a total area of 1 815 km2.In accordance with the urban development space and functional layout of "one lake,two lines and two slices"("one lake" refers to Erhai Lake;"two lines" stands for the area in the east and west of Erhai Lake;"two slices" indicates the area in the north and south of Erhai Lake),based on the construction of provincial and national garden city and of large landscape city,green spatial network system with the combination of "spot","line" and "surface" was put forward,so as to manifest "largeness","wideness","harmony" and "linkage".And finally,the planning structure of green space system of "two circles,two slices,four belts,seven spots and eighteen waterfronts area"("two circles" refers to the area around the lake and the area around the mountain,"two slices" stands for the area in the north and south of Erhai Lake,"four belts" means four landscape belts of the garden city,"seven spots" indicates the seven green landscape spots in villages and towns,"eighteen waterfronts area" is colored green belt in eighteen stream's basin) was proposed.展开更多
With the urban green space system planning of small cities in mountainous areas as the study object,the planning practices are analyzed and studied to summarize the common characteristics of urban green space system p...With the urban green space system planning of small cities in mountainous areas as the study object,the planning practices are analyzed and studied to summarize the common characteristics of urban green space system planning in those small cities.Being combined with relevant national standards and regulations,the problems that those small cities are faced with in their urban green space system planning are analyzed,then corresponding countermeasures and suggestions are put forward to resolve problems in the practical planning.展开更多
The present landscaping in residential areas of Huai'an City was introduced in this study, problems emerging from the landscaping were analyzed, and corresponding measures were proposed.
Taking 6 residential areas in Nyingchi of Tibet as research objects,from aesthetic effect,ecological function and leisure service,this paper established the evaluation indicator system for plant landscape in residenti...Taking 6 residential areas in Nyingchi of Tibet as research objects,from aesthetic effect,ecological function and leisure service,this paper established the evaluation indicator system for plant landscape in residential areas using AHP,and calculated the weight of indicators using the judgment matrix. Besides,it calculated the ideal solution and closeness degree of matrix using TOPSIS,and established the evaluation method and preference method for plant landscape in residential areas. The results show that the indicators of seasonal variation,environmental benefit and per capita green space mattered most in the landscape evaluation of residential areas. The richness of flowering plant is weak in the landscape evaluation. From the comprehensive evaluation of residential areas,Nyingchi Garden District and Xingfu District have excellent plant landscape,Jialong Garden District and Shangcheng Garden District have general plant landscape,and Sun City District and Niyang Garden District have poor plant landscape.展开更多
The mapping of impervious surface area(ISA) and urban green space(UGS) is essential for improving the urban environmental quality toward ecological, livable, and sustainable goals. Currently, accurate ISA and UGS prod...The mapping of impervious surface area(ISA) and urban green space(UGS) is essential for improving the urban environmental quality toward ecological, livable, and sustainable goals. Currently, accurate ISA and UGS products are lacking in urban areas at the global scale. This study established regression models that estimated the fraction of ISA/UGS in global 30 cities for validation using MODIS NDVI and DMSP/OLS nighttime light imageries. A global dataset of ISA and UGS fraction with a spatial resolution of 250 m×250 m was developed using the regression model, with a mean relative error of 0.19 for its ISA. The results showed the global urban area of 76.29×10~4 km^2, which was primarily distributed in central Europe, eastern Asia,and central and eastern North America. The urban land area in North America, Europe, and Asia was 66.3×10~4 km^2, accounting for 86.91% of the world’s urban area;the urban land area of the top 50 countries accounted for 59.32% of the total urban land area in the world. The global ISA of 45.26×10~4 km^2 was mainly distributed in central and southern North America, eastern Asia, and Europe, as well as coastal regions around the world. The proportion of ISA situated in built-up areas on the continental scale followed the order of Africa(>70%)>South America>Oceania>Asia(>60%)>North America>Europe(>50%), and these areas were mostly in southeastern North America, southwestern Europe, and eastern and western Asia. North America, Europe, and Asia accounted for 89.44% of the world’s total UGS. The cities of developed countries in Europe and North America exposed a dramatic mosaic of ISA and UGS composites in urban construction. Therefore, the proportion of UGS is relatively high in those cities. However, in developing and underdeveloped countries, the proportion of UGS in built-up areas is relatively low, and urban environments need to be improved for livability.展开更多
文摘This paper elaborated natural conditions of Dali City,jurisdictions which included 2 offices,2 towns,89 village offices and 429 natural villages,and planning scope which contained the precinct area of Dali City and covers a total area of 1 815 km2.In accordance with the urban development space and functional layout of "one lake,two lines and two slices"("one lake" refers to Erhai Lake;"two lines" stands for the area in the east and west of Erhai Lake;"two slices" indicates the area in the north and south of Erhai Lake),based on the construction of provincial and national garden city and of large landscape city,green spatial network system with the combination of "spot","line" and "surface" was put forward,so as to manifest "largeness","wideness","harmony" and "linkage".And finally,the planning structure of green space system of "two circles,two slices,four belts,seven spots and eighteen waterfronts area"("two circles" refers to the area around the lake and the area around the mountain,"two slices" stands for the area in the north and south of Erhai Lake,"four belts" means four landscape belts of the garden city,"seven spots" indicates the seven green landscape spots in villages and towns,"eighteen waterfronts area" is colored green belt in eighteen stream's basin) was proposed.
文摘With the urban green space system planning of small cities in mountainous areas as the study object,the planning practices are analyzed and studied to summarize the common characteristics of urban green space system planning in those small cities.Being combined with relevant national standards and regulations,the problems that those small cities are faced with in their urban green space system planning are analyzed,then corresponding countermeasures and suggestions are put forward to resolve problems in the practical planning.
文摘The present landscaping in residential areas of Huai'an City was introduced in this study, problems emerging from the landscaping were analyzed, and corresponding measures were proposed.
文摘Taking 6 residential areas in Nyingchi of Tibet as research objects,from aesthetic effect,ecological function and leisure service,this paper established the evaluation indicator system for plant landscape in residential areas using AHP,and calculated the weight of indicators using the judgment matrix. Besides,it calculated the ideal solution and closeness degree of matrix using TOPSIS,and established the evaluation method and preference method for plant landscape in residential areas. The results show that the indicators of seasonal variation,environmental benefit and per capita green space mattered most in the landscape evaluation of residential areas. The richness of flowering plant is weak in the landscape evaluation. From the comprehensive evaluation of residential areas,Nyingchi Garden District and Xingfu District have excellent plant landscape,Jialong Garden District and Shangcheng Garden District have general plant landscape,and Sun City District and Niyang Garden District have poor plant landscape.
基金supported by the Major Projects of the National Natural Science Foundation of China(Grant No.41590842)the Strategic Priority Research Program of the Chinese Academy of Sciences,Pan-Third Pole Environment Study for a Green Silk Road(Pan-TPE)(Grant No.XDA20040400)the National High Technology Research and Development Program of China(Grant No.2013AA122802)
文摘The mapping of impervious surface area(ISA) and urban green space(UGS) is essential for improving the urban environmental quality toward ecological, livable, and sustainable goals. Currently, accurate ISA and UGS products are lacking in urban areas at the global scale. This study established regression models that estimated the fraction of ISA/UGS in global 30 cities for validation using MODIS NDVI and DMSP/OLS nighttime light imageries. A global dataset of ISA and UGS fraction with a spatial resolution of 250 m×250 m was developed using the regression model, with a mean relative error of 0.19 for its ISA. The results showed the global urban area of 76.29×10~4 km^2, which was primarily distributed in central Europe, eastern Asia,and central and eastern North America. The urban land area in North America, Europe, and Asia was 66.3×10~4 km^2, accounting for 86.91% of the world’s urban area;the urban land area of the top 50 countries accounted for 59.32% of the total urban land area in the world. The global ISA of 45.26×10~4 km^2 was mainly distributed in central and southern North America, eastern Asia, and Europe, as well as coastal regions around the world. The proportion of ISA situated in built-up areas on the continental scale followed the order of Africa(>70%)>South America>Oceania>Asia(>60%)>North America>Europe(>50%), and these areas were mostly in southeastern North America, southwestern Europe, and eastern and western Asia. North America, Europe, and Asia accounted for 89.44% of the world’s total UGS. The cities of developed countries in Europe and North America exposed a dramatic mosaic of ISA and UGS composites in urban construction. Therefore, the proportion of UGS is relatively high in those cities. However, in developing and underdeveloped countries, the proportion of UGS in built-up areas is relatively low, and urban environments need to be improved for livability.
