scholarly journals Analysis situation of urban green space framework in Tehran

Vestnik MGSU ◽  
2021 ◽  
pp. 975-985
Author(s):  
Nina V. Danilina ◽  
Alireza Majorzadehzahiri
Keyword(s):  
Spatial Distribution ◽  
Lorenz Curve ◽  
Green Space ◽  
Concentration Level ◽  
Green Spaces ◽  
Location Quotient ◽  
Urban Green ◽  
Urban Green Spaces ◽  
Level Method ◽  
Per Capita

Introduction. In recent years, the development of cities and the increase in urban population has upset the balance of urban ecology in Iran. The destruction of agricultural fields and natural areas, as well as changes in the function of urban green spaces have caused environmental problems. Therefore, the main purpose of this study is to investigate the distribution of green space in Tehran with an environmental sustainability approach. Materials and methods. The research method is applied in terms of purpose and descriptive-analytical in terms of method. Basic information has been obtained through library studies and Tehran Municipality and using GIS, mathematical and statistical methods such as entropy coefficient, Concentration level method, Lorenz curve, Location quotient (L.Q) method, Distribution quotient (D.Q) method distribution of Tehran green space function were analyzed. Results. The results show the unbalanced and inappropriate spatial distribution of green space and the critical environmental situation in the 22 districts of Tehran. According to the entropy coefficient model, district 18 is the most unbalanced distribution and in contrast, district 2 has the most balanced distribution. The results of the concentration level method based on the value of C obtained for each of the districts showed that districts 4 and 1 with the level of 2.141 and 2.103 have the highest concentration level and other districts have much less concentration level than these districts. The Lorenz curve also indicates that the distribution of urban green spaces in 22 districts of Tehran is different from the uniform distribution, and in some districts, it is higher than the uniform distribution and, in some districts, it is lower, which indicates an unbalanced distribution between the districts. Location quotient (L.Q) method and distribution quotient (D.Q) method also showed that the concentration and density of green space use in different districts of Tehran was inappropriate and unbalanced. Conclusions. This research show that according to the 8 million population in Tehran, its per capita green space is 16.27 square meters and its distribution is unbalanced in 22 districts. Also districts 1 and 22 with a per capita of 33.85 and 58.67 square meters and having 204 and 77 green spaces in the suitable situation and districts 10 and 11 districts with a per capita of 2.58 and 4.96 and having 51 and 30 green spaces are in the unsuitable situation. And according to the statistical methods used, the green space of the districts has an unbalanced spatial distribution. In the 1990s and 2000s, there was a greater tendency for construction in the northern districts and about 45 % of the city’s gardens were destroyed during these years, and most of the destruction occurred in the northern districts.

scholarly journals An analysis of the spatial distribution, influence and quality of urban green space – a case study of the Polish city of Tczew

2018 ◽  
Vol 42 (42) ◽  
pp. 129-149 ◽  
Author(s):  
Adam Senetra ◽  
Iwona Krzywnicka ◽  
Marcin Mielke
Keyword(s):  
Spatial Distribution ◽  
Natural Environment ◽  
Green Space ◽  
Urban Green Space ◽  
Green Spaces ◽  
Human Welfare ◽  
Urban Green ◽  
Urban Green Spaces ◽  
The City

Abstract Rapid urban growth can exert negative effects on the natural environment due to the loss of naturally vegetated areas, loss of biological diversity, deforestation and soil erosion. The condition of cities is inherently linked with the natural environment which has a positive influence on health, social relations, human welfare and economic activity. Urban areas should abound in green spaces, and should also be easily accessible to the general public. The aim of this study was to determine the spatial distribution, influence and quality of urban green spaces on the example of the city of Tczew in northern Poland. The proposed methodology can be applied in cities of a similar size and urban structure to promote rational management of urban green space in line with the principles of sustainable development and spatial order. The Green-Space Record, a useful tool for inventorying urban green spaces, was developed to pursue the main research goal. The information accumulated in the Record constitutes valuable input data for further analysis, including the determination of the area, distribution, influence and quality of urban green spaces. The results of the analysis revealed that urban green spaces occupy more than 19% of Tczew’s territory, which is equivalent to 70.6 m2 per resident. Managed green spaces span the area of only 66.75 ha (11.31 m2 per resident) and are unevenly distributed in the city. More than half of these areas are found in the Stare Miasto (Old Town) district, whereas two residential districts (Gdańska, Prątnica) are completely devoid of public greens. The quality of urban green spaces is generally satisfactory in Tczew; however, not all residents have equal access to high-quality public greens.

scholarly journals Research on the Complexity of Forms and Structures of Urban Green Spaces Based on Fractal Models

Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Yilu Gong ◽  
Xueming Li ◽  
Xueping Cong ◽  
He Liu
Keyword(s):  
Spatial Distribution ◽  
Urban Areas ◽  
Green Space ◽  
Green Spaces ◽  
Practical Significance ◽  
Scale Model ◽  
Gradient Structure ◽  
Urban Green ◽  
Urban Green Spaces ◽  
Fractal Models

The fractal nature of urban green spaces is the product of the self-organizing evolution of the complex urban system into a higher stage, and orderly patterns and complex structures of urban green spaces will tend to manifest after they develop to a certain stage. On the basis of GF1 satellite data in 2019 and three fractal models, the complexity of the forms and structures of a green space system in downtown Dalian, China, was studied. The results showed that the boundary dimension measured by the perimeter-scale model was 0.64–1.40, and the boundary dimension measured by the area-perimeter model was 1.79–1.99; these results indicate that the degree of human disturbance in green space boundaries was high, and the stability of the green space spatial structures was poor. The grid dimension measured by the area-scale model was 0.49–1.42, and the average radius dimension measured by the area-radius model was 0.35–0.76; these results indicate that the balance of the spatial distribution of green spaces was low, and the green spaces were excessively concentrated in the city center. Through comparisons of the scaling range among various types of green spaces, the characteristic range (gradient structure) of the spatial distribution of urban green spaces was found, which can reflect the maturity of green space growth and the quality of the green space layout. The gradient structure of green spaces in Dalian was characterized by three gradients, namely, 0–4000 m, 4000–8000 m, and 8000–16,000 m. The development of green spaces in the first gradient zone was the best, and the second and third gradient zones showed relatively large potential for improvement. These research results are of practical significance for guiding the planning and construction of green spaces in urban areas.

The effect of green space behaviour and per capita area in small urban green spaces on psychophysiological responses

2019 ◽  
Vol 192 ◽  
pp. 103637 ◽  
Author(s):  
Wei Lin ◽  
Qibing Chen ◽  
Mingyan Jiang ◽  
Xiaoxia Zhang ◽  
Zongfang Liu ◽  
...  
Keyword(s):  
Green Space ◽  
Green Spaces ◽  
Psychophysiological Responses ◽  
Urban Green ◽  
Urban Green Spaces ◽  
Per Capita

scholarly journals Using GIS Analysis to Assess Urban Green Space in Terms of Real Estate Development

2021 ◽  
Vol 78 (1) ◽  
pp. 36
Author(s):  
Iulia COROIAN ◽  
Mircea Emil NAP ◽  
Ioana Delia POP ◽  
Florica MATEI ◽  
Tudor SĂLĂGEAN ◽  
...  
Keyword(s):  
Real Estate ◽  
Urban Areas ◽  
Green Space ◽  
Economic Benefits ◽  
Real Estate Market ◽  
Green Spaces ◽  
Urban Green ◽  
Urban Green Spaces ◽  
Area Of Interest ◽  
Per Capita

Urban green spaces (UGS) contribute to the development of the ecosystem, especially in crowded urban areas such as cooling effect, air and noise pollution mitigation, recreation, aesthetic pleasure, quality of life and public health, as well as economic benefits, such as raising the price of the real state in the vicinity of UGS. The aim of the paper is to realize a study on green spaces and an urban distribution of the size of a systematic planning of functional and aesthetic qualities. This study examines the distribution and amount of green space, as well as the size and rates per capita are assessed. Even the distribution of distance and the accessibility of green areas throughout the city are closely linked to ensuring recreational needs. Spatial statistics using GIS have made possible the development of correct, coherent explanatory UGS variables such as distance, size, density, connectivity, sight and accessibility. The parks and all green spaces composed of polygons were digitized from the ArcGIS Attribute Table for the evaluation of per capita rates and the execution of a plan to combat the deficit of green spaces. In order to make an assessment of the green spaces, a comparative study of the area of interest from 2010 and 2020 was considered. According to the spatial analyses from ArcGis, during the 10 years, an intense real estate market was developed, affecting the distribution of green spaces per capita.

scholarly journals Analyzing the Level of Accessibility of Public Urban Green Spaces to Different Socially Vulnerable Groups of People

2018 ◽  
Vol 10 (11) ◽  
pp. 3917 ◽  
Author(s):  
K Rahman ◽  
Dunfu Zhang
Keyword(s):  
Green Space ◽  
Public Spaces ◽  
Google Earth ◽  
High Density ◽  
Green Spaces ◽  
Vulnerable Groups ◽  
Geographical Data ◽  
Urban Green ◽  
Urban Green Spaces ◽  
Socially Vulnerable Groups

This study estimates the factors affecting socially vulnerable groups’ demand for and accessibility levels to green public spaces in Dhaka City, Bangladesh. Dhaka is a high-density city with one of the lowest levels of green space per capita in the world. Dhaka has just 8.5% of tree-covered lands, while an ideal city requires at least 20% of green space. Urban public green space provides a healthy environment to city dwellers as well as ecological soundness. This study aims to examine the effects of population density and size of a community area (Thana) on the social demand for and accessibility to green parks. To determine the socially vulnerable group demand index, this study used demographic data from the National Population and Housing Census 2011 conducted by the Bangladesh Bureau of Statistics. This study used geographical data extracted from Google Earth Pro to measure accessibility levels, and additionally analyzed geographical data with ArcGIS 10.0 and Google Earth Pro. We drew radius circles using Free Map Tools to measure time-distance weighted scores from community areas to urban green spaces. The results show that the large population size of socially vulnerable groups creates very high demand at the score of 0.61 for urban green public parks and small-sized, high-density community areas generate very good accessibility at 2.01% to green public spaces. These findings are highly useful to policymakers, urban planners, landscape engineers, and city governments to make a compact city sustainable, inclusive, and resilient. Moreover, the notion of a “smart city” might be a smart solution in order to manage Dhaka Megacity sustainably in this modern technological age.

Noise perception assessment in urban green spaces using soundwalk approach

2021 ◽  
Vol 263 (1) ◽  
pp. 5780-5791
Author(s):  
Omid Samani ◽  
Verena Zapf ◽  
M. Ercan Altinsoy
Keyword(s):  
Green Space ◽  
Traffic Noise ◽  
Urban Green Space ◽  
Green Spaces ◽  
Noise Emission ◽  
Visual Effect ◽  
Technical Noise ◽  
Urban Green ◽  
Urban Green Spaces ◽  
The City

Urban green spaces are intended to provide citizens with calm environments free of annoying city noises. This requires a thorough understanding of noise emission and related exposure to sounds in green spaces. This research investigates noise perception in various spots in an urban green space. For this purpose, the study has been conducted in the grand garden of the city of Dresden. The garden covers 1.8 square kilometers of various landscapes, including water streams, park railways, fountains, bridges, roads for bicycles and pedestrians etc. Noise perception was investigated at eleven spots with emphasis on four noise types: nature noise, human noise, traffic noise, and technical noise. In parallel, audio-visual recordings were conducted for each spot to identify the connection between the perceptual measures and the psychoacoustic parameters. These spots are categorized based on the resulting perception and psychoacoustic parameters. In addition, the visual effect of each spot on final perception is investigated. Eventually, annoyance for each spot is identified based on the corresponding participants' perception and is associated with the relevant psychoacoustic parameters.

scholarly journals Assessing the Coverage of Urban Green Space in Butwal Sub-Metropolitan City, Nepal: A GIS based Approach

2018 ◽  
Vol 15 ◽  
pp. 77-86
Author(s):  
Mahendra Singh Thapa ◽  
Gokul Poudel
Keyword(s):  
Green Space ◽  
Urban Environments ◽  
Green Spaces ◽  
Landsat 8 ◽  
Urban Green ◽  
Urban Green Spaces ◽  
Metropolitan City ◽  
Object Oriented Approach ◽  
Materialistic Values ◽  
Urban Places

Urban green spaces are integral part of urban infrastructure. Green spaces can offer a number of benefits ranging from inner spiritual to outer materialistic values. Available green spaces in particular area especially in urban places need to be identified and located properly with scientific way and means so that we can use those places in emergency caused by natural or human induced hazards. This study has tried to measure the green space available for people dwelling in Butwal Sub-Metropolitan City of Nepal. An attempt was made to quantify green spaces in urban environments from Landsat 8 OLI imageries using object-oriented approach and field verification. The study concluded that the total green space available in Butwal Sub-Metropolitan City is 86.37 km2 i.e., around 86% of total municipal area and per capita green space is around 623 m2.

scholarly journals Social Cohesion and City Green Space: Revisiting the Power of Volunteering

Challenges ◽  
2019 ◽  
Vol 10 (2) ◽  
pp. 36
Author(s):  
Jennings
Keyword(s):  
Social Interactions ◽  
Social Cohesion ◽  
Green Space ◽  
Potential Role ◽  
Green Spaces ◽  
Urban Green ◽  
Urban Green Spaces ◽  
Immense Potential

Urban green spaces can facilitate positive social interactions in numerous ways. These interactions may lead to the development of social cohesion among city dwellers. This article provides a viewpoint on the potential role that the presence of green space and volunteering can play in the construct of social cohesion. Specifically, the article focuses on one aspect of social cohesion, volunteerism, as a way to illustrate the immense potential of social cohesion to link health with place and the planet.

How are characteristics of urban green space related to levels of physical activity: Examining the links

2016 ◽  
Vol 26 (8) ◽  
pp. 1091-1101 ◽  
Author(s):  
Abdullah Akpinar ◽  
Murat Cankurt
Keyword(s):  
Physical Activity ◽  
General Population ◽  
Household Income ◽  
Green Space ◽  
Green Spaces ◽  
Physically Active ◽  
Urban Green ◽  
Urban Green Spaces ◽  
The City ◽  
Exercise Equipment

This study investigates the associations between characteristics of urban green spaces and frequency and duration of self-reported physical activity in the city of Aydın, Turkey. Data were collected through a survey with 420 participants. We analysed the associations between characteristics of urban green spaces and frequency and duration of general population’ physical activity and physical activity of physically active people with multivariate linear regression while controlling for sex, age, marital status, education level, occupation and household income level. Results showed that for the general population, short distance to urban green spaces, many trees, exercise equipment and picnic areas were positively associated with frequency of physical activity, while barbecue and fire places negatively associated with duration of physical activity. For physically active people, many trees, soccer and basketball fields were positively associated with their frequency of physical activity, but water features were negatively correlated with frequency of physical activity. In regard to duration of physical activity for physically active people, findings showed lawn and exercise equipment were positively correlated with duration of physical activity, while water features, barbecue and fire places were negatively correlated with duration of physical activity. The findings indicate that levels of physical activity in urban green spaces could be promoted with many trees, exercise equipment, picnic areas and lawn. However, causal relationship needs to be conducted with intervention or longitudinal studies.

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