تعیین جهات بهینه توسعه فیزیکی شهر مراغه با استفاده از منطق فازی و متغیرهای طبیعی

نوع مقاله : مقاله مستخرج از پایان نامه

نویسندگان

گروه جغرافیا و برنامه‌ریزی شهری، دانشکده علوم انسانی، دانشگاه مراغه، مراغه، ایران.

چکیده
در حال حاضر 50 درصد جمعیت جهان در شهرها زندگی می­کنند و آمارها نشان از وجود روند افزایشی شهرنشینی در دنیا دارند. اسکان این حجم از جمعیت در مناطق شهری باید طبق برنامه­ریزی­های قبلی صورت گیرد، تا از بروز آسیب به محیط زیست جلوگیری شود. از سوی دیگر، می‌بایست برنامه‌ریزان فرایندهای مربوط به توسعه فیزیکی شهر را برای اتخاذ استراتژی­های توسعه پایدار شهری ادراک نمایند. به منظور بررسی تناسب اراضی برای توسعه فیزیکی شهر مراغه، 9 متغیر مورد بررسی قرار گرفتند. این متغیرها عبارتند از: شیب، ارتفاع، فاصله از شهر، فاصله از راه­های ارتباطی، فاصله از رودخانه، خاک­شناسی، زمین­شناسی، پوشش گیاهی و کاربری اراضی. لایه­های موضوعی متغیرهای مورد بررسی با استفاده از انواع توابع خطی کاهشی یا افزایشی و تعریف کاربر به فازی تبدیل شدند. به این ترتیب، مقادیر همه نقشه­های تهیه شده بین 0 و 1 تعریف و با استفاده از عملگر گامای فازی با یکدیگر ترکیب شدند. در نهایت نقشه نهایی تناسب اراضی جهت توسعه فیزیکی شهر مراغه تهیه گردید. نتایج به دست آمده نشان می­دهد که بالغ بر 23 درصد از محدوده مطالعاتی جهت توسعه فضایی شهر در کلاس با تناسب بسیار پایین قرار می­گیرند. در حالت تطبیقی 18 درصد از محدوده مورد مطالعه در شرق و جنوب غرب شهر مراغه و به صورت پیوسته و متصل به شهر برای گسترش فیزیکی شهر مراغه از شرایط بسیار مطلوبی برخوردار هستند. این پهنه­ها در فاصله­ای دور از رودخانه و بستر دره صوفی­چای قرار دارند و در نتیجه منجر به جلوگیری از بروز مسائل زیست محیطی و اکولوژیکی می‌شوند.

کلیدواژه‌ها


عنوان مقاله English

Site selection for physical development of Maragheh city using fuzzy logic and natural variables

نویسندگان English

Marziyeh esmaeilpour
Sedigheh Karimi
a. Department of Geography and Urban Planning, Faculty of Human Sciences, University of Maragheh, Maragheh, Iran.
چکیده English

Currently, 50 percent of the world's population lives in cities, and statistics indicate an increasing trend of urbanization in the world. In order to prevent damage to the environment, the settlement of the population in urban areas should be carried out in accordance with prior planning. On the other hand, understanding the processes related to the physical development of the city is essential for planners to adopt sustainable urban development strategies. In order to examine the suitability of land for the physical development of Maragheh city, nine variables were examined, including slope, elevation, distance to the city, distance to communication network, distance to the river, soil, geology, vegetation, and land use. The thematic layers of the variables were transformed into fuzzy sets using various types of linear functions, either decreasing or increasing, and user-defined. In this way, the values ​​of all the prepared maps were defined between 0 and 1 and then combined using the fuzzy gamma operator. Finally, the final map of land suitability for the physical development of Maragheh was prepared. The results show that over 23% of the study area is in the very low-proportion class for spatial development of the city. In comparison, 18% of the study area in the east and southwest of Maragheh city and continuously connected to the city have very favorable conditions for physical development of Maragheh city. These areas are located far from the river and the bed of the Sufi-Chai valley, and as a result, environmental and ecological problems will be avoided.

کلیدواژه‌ها English

physical development
site selection
natural variables
fuzzy logic
Maragheh
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