جستجوی مقالات مرتبط با کلیدواژه « تحلیل شبکه ای فازی » در نشریات گروه « جغرافیا »

Earthquake is dangerous and catastrophic natural phenomena that cause great damage to human societies every year. Despite significant advances in the retrofitting of urban buildings and increasing the knowledge and ability of specialists in natural disaster control, earthquakes are still considered as one of the most important hazards in residential areas, especially cities. Iran is one of the most earthquake-prone countries in the world and the city of Razan in Hamadan province has a high seismic potential due to its location next to important faults such as Avaj fault and the possibility of earthquakes with a magnitude of more than 6 in this region. Therefore, determining the vulnerability and resilience of this city against earthquakes is very important. The purpose of this study is to prepare a zoning map of Razan city vulnerability and also to determine the resilience of Razan city to earthquake events. In order to prepare a zoning map of Razan city vulnerability to earthquake, 15 demographic, natural and physical variables were used and using fuzzy network analysis (FANP), Razan vulnerability map was prepared in five floors and by neighborhoods. Took. In addition, in order to analyze the resilience and readiness of the residents of this city to deal with the earthquake event, 372 questionnaires in the form of 32 questions with social, economic, physical-managerial and environmental approaches were completed by the citizens of this city. The results of vulnerability zoning show that 55% of the area of Razan city is in the range of high and very high vulnerability and neighborhood 5 with an average vulnerability of 0.798 has the highest vulnerability. Physical factors such as poor skeleton of buildings, old age of buildings, narrow passages and especially high population density are important factors affecting the vulnerability of Razan city. In addition, the results of the questionnaire show that the preparedness and resilience of the city's neighborhoods against earthquakes in any of the city's neighborhoods are not on the upper and very high floors, and the middle class with a score of 2.7 is the dominant trend in the resilience of these neighborhoods. It is a city and the third neighborhood of this city has the lowest rate of resilience of the city. Poor functioning of management and institutional structures as well as low economic ability of citizens to return to favorable conditions after the earthquake are among the factors that have led to a decrease in the resilience of Razan city against earthquakes.

The study of changes in water resources in each region is essential to manage water resources and using them. In this study, the goal is to evaluate the available water resources in the plain of Ardebil in terms of surface and subsurface resources based on four criteria including natural, hydrological, agricultural and humanitarian by using fuzzy network analysis. In order to assess better fuzzy network analysis evaluation, sub-criteria of population, industry condition, rainfall situation, the status of surface water (volume taken from the river) and groundwater (wells, springs and aqueducts status), the area under cultivation and the type of products in terms of water demand, slope and elevation are used. Dependencies among sub-criteria using DEMATEL fuzzy technique and according to experts are determined. Using the fuzzy network analysis all criteria and sub- criteria are weighed, and the maps for all sub-criteria, are generated in according to the weight obtained. Finally, the result map that is based on initial layers and weighted based on the fuzzy techniques is generated in GIS. The resulting map is identified the sensitivity of the study area in terms of potential water resources. The study area (Ardebil plain) is located in the northwest of Iran and is delimited by latitudes 38°05′ N and 38° 30′N and longitudes 48°15′ E and 48° 35′E. The average height is about 1360 meters from the sea level. It covers an area of about 820 km2 and is part of Qara Soo river basin. The low risk areas 11.13 % equivalent to 9200 hectares are located on the northern and a bit in west of the plain. The average risk areas 19.36 % equivalent to 15870 hectares are located in the north and west of plain. The high risk areas 21.3 % equivalent to 17510 hectares are located mostly in the central and upper parts of the plain. The vulnerable risk areas 31.9 % equivalent to 26220 hectares are located in the southern and central parts of the plain and finally the critical areas 16.1 % equivalent to 13250 hectares are scattered mostly in the south and east of the study area.