تحلیل فضایی پهنه‌های مخاطره آمیز شهرستان اردبیل

زیرساخت‌های نامناسب واحدهای سکونتگاهی و نابرابری‌های اجتماعی اقتصادی موجود میان شهرها و روستاها، منجر به نابسامانی فضایی در شبکه سکونتگاهی کشور شده و آسیب‌پذیری آنها را در برابر بلایای طبیعی پیوسته افزایش داده است؛ در همین راستا این پژوهش سعی دارد با استفاده از منطق فازی، مناطق مخاطره‌آمیز استان اردبیل را پهنه‌بندی کند. نتایج به دست آمده از پهنه‌بندی خطر لرزه‌خیزی، نشان می‌دهد مناطق خطرناک عمدتاً در نزدیکی گسل‌ها و سنگ‌هایی با مقاومت اندک در برابر زلزله، قرار گرفته‌اند. نکته جالب توجه این است که تقریبا بخش‌های وسیعی از منطقه در شمال و جنوب، به‌ویژه بخش هیر، در پهنه بسیار خطرناک قرار دارد؛ فقط بخش‌های کوچکی در غرب منطقه در پهنه کم‌خطر قرار گرفته است. همچنین بر مبنای نقشه به دست آمده، بخش‌های غربی و جنوب شرقی منطقه با داشتن ویژگی‌هایی از قبیل شیب‌های تند و آبراهه‌های متراکم، بیشترین میزان آسیب‌پذیری ناشی از حرکات دامنه‌ای را دارد. نتایج نشان می‌دهد بیشترین خطر سیل‌خیزی و فرسایش در حوالی شمال غربی تا غرب و تا حدودی جنوب شرق منطقه در محدوده بخش هیر است. به طور کلی نقشه نهایی پهنه‌بندی مخاطرات در منطقه مطالعاتی حاکی از آن است که بخش‌های شمال غربی و جنوب شرقی منطقه در پهنه‌های بسیار خطرناک قرار دارد.

Spatial Analysis of Hazardous Areas in Ardabil City

Inappropriate infrastructure of residential units and socioeconomic inequalities between cities and villages have caused spatial disruption in the country's residential network and has constantly increased their vulnerability to natural disasters. In this regard, this research attempts to zone the risk areas of Ardebil province using fuzzy logic. The results of seismic hazard zonation show that hazardous areas are located near faults and rocks that are resistant to earthquake. It is worth mentioning that almost large parts of the area are located in the north and south, and in particular in the Hir area, in a highrisk zone. Only small parts in the west are located in a lowrisk area. Also, based on the obtained map, the western and southeastern parts of the region, with features such as steep slopes and dense waterways, show the highest degree of vulnerability due to amplitude movements. Also, according to the map the northern region near the northwest to the west and southeast within the Hir district, there is the most intense soil erosion. In general, the final map of hazard zonation in the studied area indicates that parts of the northwest and southeast of the region are in high risk zones. Zoning is the division of land into separate areas and rank these areas, especially in terms of degrees of actual or potential hazards and risks, and the hazards and risks can be human or natural hazards. In fact, it helps to understand and consequently will deal with these phenomena. The results show that earthquake, flood, erosion, slope movements as are Ardebil environmental hazards. Also consider the results based on the parameters, the North West and South East of the study area entitled risk more than any other section. According to the research findings topographical features, steep and fault density and type of formation in the mentioned sectors increased extremely the high risk of natural processes in this area. At the end two things are necessary: The first point: Indeed of some zones at low risk and vulnerable levels, doesn’t represent the ideal situation and only the relevant zone is defined in relation to the other zones. The second point: In this study, zoning of environmental hazards has been based on 11 indicators of risk. Obviously, by considering other different indicators, the zoning will be change.