فهرست مطالب atoosa hassani

Despite the progress of urbanization, earthquake as one of the most important natural hazards threatens most cities in the world. Accordingly, managing and reducing the vulnerability of cities to this disaster, as well as the planned relief and rescue operation, are of particular importance. The city of Isfahan, Iran, is one of the areas which requires proper attention and planning due to its high population density and vulnerability. In this regard, this study was conducted to identify the physical texture vulnerability of the District 5 of Isfahan to earthquakes and its impact during rescue and relief operations.

To conduct the research, the indices of access to green space, building density, population density, distance from the fault, distance from relief centers, access to roads and arteries, and width of roads were selected due to their frequency in studies conducted on the vulnerability of cities and scores given by specialists. Finally, the critical areas of the region were determined by weighting each of the indices using the analytic hierarchy process method in Expert Choice software (version 11) and examining the vulnerability of the region in the Geographic Information System.

It was revealed that 68% of the area had a suitable density of green space, and 73% and 88% of the region had low building and population densities, respectively. Moreover, 76% of the area had good access to relief centers and the whole area had proper passages. Finally, it was found that no faults passed through this area, and the impact of adjacent faults caused this area to be in a moderate situation in terms of vulnerability.

The critical areas were determined by overlaying each of the vulnerability layers of the city and applying their degree of importance. The results showed that 6% and 18% of the areas were in critical and highly vulnerable conditions, respectively. Therefore, rescue and relief operations would be performed with an acceptable capacity after such disasters as earthquakes.

Preparedness for an earthquake is one of the most important factors in reducing the fatalities caused by it; this preparedness has various aspects that can be designed with proper planning so that the city suffers the least damage in the moment of disasters such as an earthquake. Proper open and green spaces, in addition to improving the quality of daily life in cities, can increases the citychr('39')s rehabilitation capacity in earthquake-prone zones. In this study, the aim is to identify the important role of urban open spaces in rescue and emergency shelter after the earthquake, vulnerability of these spaces in the Hashtgerd new town, and their response to the population density.

The present research is applied and its method is descriptive-analytical. In this method, information was collected by reviewing documents, conducting field studies, and studying specialized sources. Access to green spaces, proportionality to population density, land use and distance from relief centers were selected and finally by quantitative content analysis and weighting of each of the indicators by AHP method in Expert Choice software and review of green spaces according to individual Indicators in GIS software, critical zone revealed.

During the article process, by examining the vulnerability of urban green spaces with the indicators of proximity to faults, proximity to relief centers, access to them, compatibility with surrounding land uses and population density, it is determined that only about 12% From the area of the city, which includes phases one, two, three and part of phase four, they are in a critical situation and very vulnerable. Instead, 69.23% of its area has low and very low vulnerability and 18.69% have moderate vulnerability.

Considering that 3.81% of the area of green spaces in the city is in a critical situation (which these sections are located in phases 1, 2, 3 and 4 of the city) for solution creating appropriate access and balanced distribution of green spaces throughout the city, increase their number and prevent the conversion of gardens and green spaces into residential lands, remove hazardous uses from the city limits, increase relief centers And the consolidation of soil and terracing of green spaces on the slope to prevent landslides following a possible earthquake can reduce the vulnerability of green spaces in Hashtgerd and provide safer conditions when evacuating and housing the earthquake victims.

Occurrence of natural disasters, especially earthquakes, in urban environments has destructive effects and humans are also increasingly suffering from the harmful effects of these disasters. Therefore, proper recognizing and planning before the accident can reduce the devastating effects of these events, casualties and financial losses left by them. The aim of this study was to identify the vulnerability of the physical tissue of Hashtgerd new city against a probable earthquake.

The present research is applied and descriptive-analytical study. At first, eight indicators, such as, accessibility to open spaces, building density, population density, land use, closeness to fault zone, access to vital services, accessibility to street network and passagechr('39')s width were selected by using the opinion of experts and Likert scale, and finally the critical areas of the city were revealed through quantitative content analysis of indicators and weighting each of them by AHP method in Expert Choice software program, and analyzing the vulnerability of Hashtgerd new town in GIS software.

Only about 18% of the city, which includes phases 1, 2, 3, and part of phase 4, were in a crisis situation. 54.91% of its area had low and very low vulnerability and 26.73% had moderate vulnerability.

The vulnerability of the new city of Hashtgerd can be reduced by increasing the density of green spaces in the city and their proper distribution, controlling population and building density in the direction of the entrance axis and their balanced distribution in the city, increasing the number of vital centers, respecting the privacy of faults, especially in phases 2, 4 and 5 and assigning these points to spaces Urban greenery, proper planning for using the wastelands and the lack of proximity to incompatible uses.