the purpose of this research was to study the role of non-governmental organization inpreserving of urban green areas in the city of tehran. this is a descriptive-correlationresearch method. population of this study was 120 active members of two non-governmentalorganizations in tehran. after distributing the questionnaires, 62 questionnaires werereturned. content and face validity of the instru...

Green belt is defined as a narrow green area surrounding an urban area. Shiraz green belt has been developed through 9 projects with a variety of purposes since 2005. The development of green belt is being considered in a number of Iranian cities, and therefore, investigation of Shiraz green belt’s purposes and challenges could contribute to an appropriate planning by decision makers. The main ...

Green belt is defined as a narrow green area surrounding an urban area. Shiraz green belt has been developed through 9 projects with a variety of purposes since 2005. The development of green belt is being considered in a number of Iranian cities, and therefore, investigation of Shiraz green belt’s purposes and challenges could contribute to an appropriate planning by decision makers. The main ...

green belt is defined as a narrow green area surrounding an urban area. shiraz green belt has been developed through 9 projects with a variety of purposes since 2005. the development of green belt is being considered in a number of iranian cities, and therefore, investigation of shiraz green belt’s purposes and challenges could contribute to an appropriate planning by decision makers. the main ...

Urban green spaces have been shown to decrease land surface temperature (LST) significantly. However, few studies have explored the relationships between urban green spaces and LST across different seasons at different spatial scales. In this study, using Changchun, China as a case study, landscape ecology and comparative approaches were employed quantitatively to investigate the effects of the...

quantitative identification of physical changes, developments and dynamic position of urban green space is considered as the first step in its planning. by means of the aerial photos taken in 1956, 1974, and 1994 as well as the quick bird satellite image captured in 2006, this study has dealt with changes in per capita green space in khorramabad during these years. first, geometric corrections ...

land use changes are one of the important consequences of urban spatial extent. regarding the role of green space as one of important land use classes in urban ecosystems, the investigations of its changes seem to be crucial. in this study, to estimate the changes of green space, the ndvi index was applied to tm and irs images of 1990 and 2006 and green space maps of district 1 of tehran munici...

In this investigation, a numerical model expressing advection and diffusion effects is used to examine air temperature rise in urban areas that are on the leeward side of green areas. The model results are then verified by comparison with measurement results. When the measurement point is at a distance of 30 m or more from a green area, the air temperature of the urban area is not affected by t...

Countermeasures to urban flooding should consider long-term perspectives, because climate change impacts are unpredictable and complex. Urban green spaces have emerged as a potential option to reduce urban flood risks, and their effectiveness has been highlighted in notable urban water management studies. In this study, flooded areas in Seoul, Korea, were divided into four flooded area types by...

Quantitative identification of physical changes, developments and dynamic position of urban green space is considered as the first step in its planning. By means of the aerial photos taken in 1956, 1974, and 1994 as well as the Quick Bird satellite image captured in 2006, this study has dealt with changes in per capita green space in Khorramabad during these years. First, geometric corrections ...