امکانسنجی توسعه فیزیکی شهری با بهره‌گیری از داده‌های ژئومورفولوژیک و منطق فازی (مورد مطالعه: شهر دهگلان)
پارسا احمدی دهرشید
1
(
گروه جغرافیای انسانی و برنامه ریزی، دانشکده جغرافیا، دانشگاه تهران، تهران، ایران.
)
اسماعیل نجفی
2
(
استادیار دانشکده علوم زمین گروه ژئومورفولوژی دانشگاه دامغان، دامغان، ایران.
)
محمد فتح اله زاده
3
(
گروه جغرافیای طبیعی، دانشکده جغرافیا، دانشگاه تهران، تهران، ایران.
)
کلید واژه: توسعه فیزیکی شهر, ژئومورفولوژی شهری, پهنه‌بندی, منطق فازی, شهر دهگلان.,
چکیده مقاله :
یکی از عوامل مهم در مکان‌گزینی شهرها و ترسیم مسیر رشد و توسعه فیزیکی آن‌ها، توجه به ویژگی‌های محیطی، علی‌‌الخصوص پارامترهای ژئومورفولوژیکی است. در صورت عدم توجه به ویژگی‌های ژئومورفولوژیکی در توسعه شهری، این مراکز - شهرها - که عمدتاً کانون تجمع جمعیت و انباشت سرمایه و زیرساخت هستند، با خطرها و خسارت‌های شدید مواجه می‌‌شوند. هدف پژوهش حاضر، امکانسنجی توسعه فیزیکی شهر دهگلان، با استفاده از پارامترهای ژئومورفولوژیکی است. پارامترهای مورداستفاده در پژوهش حاضر شامل شیب، جهت شیب، فاصله از رودخانه، فاصله از گسل، کاربری اراضی و زمین‌شناسی است. روش پژوهش مبتنی بر رویکرد توصیفی - تحلیلی بوده و از مدل منطق فازی جهت دستیابی به هدف پژوهش استفاده شده است. محدوده مورد مطالعه شهر دهگلان در استان کردستان است که با توجه به مثبت بودن رشد جمعیت آن در سال‌های گذشته، مستلزم ارزیابی و مطالعات مرتبط با توسعه شهری است. نتایج به‌دست‌آمده از اعمال عملگر گامای فازی (9/0) نشان می‌دهد که 2.7% محدوده موردمطالعه دارای شرایط بسیار مناسبی جهت توسعه فیزیکی آتی است که عمدتاً در جهتهای شمال و شمال شرقی شهر واقع‌اند. با توجه به نامناسب بودن جهتهای دیگر و همچنین، مساحت کم پهنه‌های مناسب، نمی‌‌توان گسترش فیزیکی را برای توسعه آتی شهر دهگلان پیشنهاد داد. در پایان پیشنهاد می‌شود که رویکرد گسترش آتی شهر دهگلان، گسترش عمودی و با بهره گیری از اراضی قهوه¬ای، بایر و موات درون شهری باشد.
چکیده انگلیسی :
One of the most important factors in locating cities and mapping their physical growth and development is to pay attention to environmental characteristics, especially geomorphological parameters. In the absence of geomorphologic features in urban development, these centers - cities - which are mainly the focus of population accumulation and capital accumulation and infrastructure, face severe risks and losses. The purpose of this study is to investigate the feasibility of physical development of Dehgolan city using geomorphological parameters. The parameters used in this study include slope, slope orientation, distance from river, distance from fault, land use and geology. The research method is based on a descriptive-analytical approach and fuzzy logic model has been used to achieve the research objective. The area of study is Dehgolan city in Kurdistan province, which requires evaluation and studies related to urban development due to its positive population growth in recent years. The results of the fuzzy gamma operator (0.9) show that 2.7% of the studied area has very good conditions for future physical development, which is located mainly in the north and northeast directions of the city. Due to the inappropriateness of other directions as well as the area of suitable low zones, physical expansion for future development of Dehgolan city cannot be suggested. Finally, it is suggested that the future expansion approach of Dehgolan city is vertical expansion and utilizes brown, waste, and movable lands within the city.¬¬
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