@article { author = {Nayyeri, Hadi and Salari, Mamand and Ganjaian, Hamid and Amani, Khadat}, title = {Geomorphological Assessment of Land Suitability for the Physical Expansion of Sanandaj City Applying Restricted Areas}, journal = {Geographical Urban Planning Research (GUPR)}, volume = {5}, number = {1}, pages = {127-145}, year = {2017}, publisher = {Institute of Geography, Faculty of Geography, University of Tehran}, issn = {2383-1456}, eissn = {2423-7779}, doi = {10.22059/jurbangeo.2017.63213}, abstract = {Introduction The Third World cities, in recent years, are faced with numerous problems, including population growth, uncontrolled migration and consequently increasing disproportionate construction with environmental capabilities. This heterogeneous development has multiplied the vulnerability of cities to the risks involved. The fact is that the structure of the spatial and physical development of cities is very complicated. This problem prevents many attempts to analyze and communicate useful and effective policies and approved plans of the city. Therefore, understanding the natural structure of the area, on the one hand, could have the breadth of vision and knowledge of the environment and, on the other hand, provides a measured and considered the possibility of any movement in the environment by humans in the form of a regular system. Establishment and creation of a city, more than anything else, depends on the conditions of its geographic location, because the natural phenomena have a decisive effect in location, sphere of influence, urban physical and morphological development. Natural phenomena act as sometimes positive and sometimes negative factors and inhibitors. Therefore, any development in natural areas should be done with appropriate programs and management plans and zoning so that, along with the people use of the region, it is possible to preserve its natural values and, thereby achieve continuous operation of the area. To achieve this objective, urban land-use planning is considered as one of the main aspects of building the city. Due to the turmoil, the problems of the cities have been considered. In this connection, environmental and especially geomorphological features, in the direction of optimal management of this process are very significant and have important role and should be considered and evaluated as a necessity in connection with the selection and development of environments settlements and especially urban areas.   Methodology In this study, to investigate and zoning favorable areas for urban development, 8 different factors of slope, aspect, elevation, geology, land use, distance to fault, distance from the river and distance from urban areas have been used as factors of this research. In order to analyze the data and locating suitable areas for respective objectives, restricted areas method and fuzzy logic with AHP models have been used. The restricted areas method is for site selection of the settlements appropriate for all criteria. For this purpose, restricted areas have been identified that are fit for the purposes of urban development. Then, for the areas that are off-limits, zoning action is taken by using a combination of fuzzy logic and AHP. In the present study, in order to prioritize the criteria and determine the weights of each of them, the AHP model is used. For this purpose, the opinions of relevant experts are used. Moreover, the final weight of each criterion is obtained after comparing test criteria. In order to increase the accuracy of the study and comparison, fuzzy logic model associated with linear membership function is used to layers.   Results and discussion For site selection of suitable areas for urban development in the study area, eight parameters were used. After gaining weight factors and identifying restricted area, the layers of fuzzy data were collected and have become comparable. Then, according to the final weight of the criteria and the restricted areas, data layers are combined and integrated in GIS. Gamma fuzzy operator is used to adjust the sensitivity of the very high multiplication sensitivity and very low phase addition operator fuzzy. The results obtained from integrating layers as well as restricted areas (Figure 12) indicates that a large portion of the study area is restricted areas and unsuitable for its respective purpose. Unlike marginal and peripheral areas, central areas of the study area have fair potential for urban development goals. In fact, many of these areas are off-restricted areas.   Conclusion In this study, different aspects of urban development in Sanandaj city were examined in different directions and using natural parameters. Finally, the total area of 208 square km under study were evaluated and placed in three categories of relatively good, good and very good. Mountainous areas, high-altitude regions and consequently high slope regions with crossing streams and multiple faults, and restricted areas for urban development have the greatest area (36%) of the map. Relatively good areas for development are in second place, 25.1%, and located mostly in southern and eastern parts of the map. The 23.7% of the total area under consideration is allocated to the good fields in the northern parts of urban development. Moreover, 15.2% of map area is allocated to very good lands for urban development. This covers much of the center of the map and the current location of Sanandaj City. Finally, the results of this research are in a borderline management state for the present situation and provide management horizon for urban development patterns in the future.}, keywords = {urban physical expansion,geomorphological urban restrictions,restricted areas,Sanandaj}, title_fa = {ارزیابی ژئومورفولوژیکی تناسب زمین برای گسترش کالبدی شهر سنندج با اعمال مناطق ممنوعه}, abstract_fa = {استقرار و پیدایش هر شهر بیش از هر چیز تابع شرایط و موقعیت جغرافیایی آن است؛ زیرا عوارض و پدیده‌های طبیعی در مکان‌گزینی، حوزۀ نفوذ، توسعۀ فیزیکی و فرم شهری اثر قاطعی می‌گذارند. تحقیق حاضر با هدف پتانسیل‌سنجی توسعۀ کالبدی شهر سنندج، ابتدا موانع و محدودیت‌های موجود را شناسایی کرده، سپس نواحی مناسب و نامناسب برای توسعۀ شهری را تفکیک می‌کند. به‌منظور انجام پژوهش حاضر از ابزارهایی مانند نقشه‌های توپوگرافی 1:25000، نقشۀ زمین‌شناسی 1:100000، اسناد، گزارش‌ها، کتاب‌های موجود و همچنین لایه‌های اطلاعاتی مورد نیاز استفاده شده است. برای نیل به اهداف تحقیق، ابتدا عوامل مهم مؤثر در شکل‌گیری شهرها ازجمله شیب، جهت شیب، ارتفاع، زمین‌شناسی، کاربری اراضی، فاصله از گسل، فاصله از رودخانه و فاصله از نقاط شهری بررسی شده و نواحی‌ای که ازنظر این پارامترها در محدودیت قرار دارند، مشخص شدند. در ادامه، پس از تشخیص نواحی ممنوعه، سایر محدوده‌های منطقۀ مورد مطالعه با استفاده از مدل‌های منطق فازی و AHP به سه ردۀ نسبتاً مناسب، مناسب و بسیار مناسب تقسیم شد. نتایج نشان می‌دهد که 36درصد از مساحت نقشه، منطقۀ ممنوعه بوده و برای توسعۀ شهری مناسب نیست. نتایج تحلیلی‌تر بیانگر آن است که پهنۀ برآورد‌شدۀ مناطق ممنوعه نسبتاً زیاد است و با آنکه غالباً منطبق بر پهنه‌های پیرامونی است، بخشی از نواحی داخلی محدودۀ مورد مطالعه را نیز شامل می‌شود. این مسئله که ناشی از شرایط توپوگرافیک و نیز تکتونیکی خاص منطقه است، بیانگر اهمیت ارزیابی‌های محیطی و ژئومورفولوژیکی در مدیریت صحیح‌تر شهری است. سایر پهنه‌های مطالعاتی به ترتیب 1/25درصد نسبتاً مناسب، 7/23درصد مناسب و 2/15درصد پهنۀ بسیار مناسب برآورد شده‌اند. پهنه‌های موجود به دلیل رویکرد سیستمی موجود در پژوهش و به تبع آن، ارزیابی متغیرهای تأثیر‌گذار مرتبط، قابلیت کاربری دارند. به بیانی می‌توان گفت تراکم بیشتر اراضی بسیار مناسب در محل کنونی شهر سنندج و اطراف آن به دلیل شرایط طبیعی و انسانی درخور توسعۀ شهری است. باوجوداین ضرورت درنظرگرفتن و اعمال این ارزیابی‌های سیستمی محیطی در مدیریت شهری درخور توجه است.}, keywords_fa = {توسعۀ شهری,تناسب زمین,مناطق ممنوعه,سنندج}, url = {https://jurbangeo.ut.ac.ir/article_63213.html}, eprint = {https://jurbangeo.ut.ac.ir/article_63213_7f6434ddda90484ec1805e7595c7e04c.pdf} }