تحلیل الگوی شکل پایدار شهر کرمانشاه با استفاده از روش‌های کمی

نوع مقاله: مقاله علمی پژوهشی

نویسنده

استادیار دانشگاه پیام‌نور تهران

چکیده

رشد سریع و گسترش افقی شهرها در دهه‌های اخیر، همۀ کشورهای جهان را با چالش‌های جدی روبه­رو ساخته است. مسائل مربوط به این پدیده، نه‌تنها بر سیاست‌های شهرسازی تأثیر وسیعی گذاشته، بلکه تبعات آن در تشدید ناپایداری مسائل اقتصادی، اجتماعی، سیاسی، مدیریتی و زیست‌محیطی جوامع نقش اساسی داشته است. این پژوهش، به ارزیابی الگوی شکل کالبدی شهر کرمانشاه می‌پردازد و به این پرسش پاسخ می­دهد که آیا الگوی رشد شهری آن در راستای پایداری است. برای پاسخ به این پرسش، ضمن بررسی ادبیات موجود در زمینه‌های رشد پراکنش شهری و همچنین الگوی رشد فشردة شهری، روش توصیفی- تبیینی به­کار گرفته شد. برای تحلیل داده‌ها و تعیین درجة تجمع جمعیت و اشتغال یا نسبت فشردگی و پراکنش براساس همبستگی فضایی، از ضرایب موران و گری و برای تشخیص توزیع نامتعادل، از ضرایب جینی و آنتروپی نسبی شانون استفاده شد. از مدل هلدرن نیز برای اندازه‌گیری رشد بی‌قوارة شهری استفاده شد. مطابق یافته‌ها، الگوی رشد شهری کرمانشاه تا حدودی پراکنده است و نابرابری و نبود تعادل در توزیع جمعیت در نواحی شهری آن مشهود است. نتایج نشان داد الگوی رشد شهر به الگوی تصادفی نزدیک‌تر و متمایل به پراکنش است. همچنین محاسبات انجام­شده از طریق مدل هلدرن نشان می‌دهد 45 درصد از رشد فیزیکی شهر، درنتیجة رشد افقی (اسپرال) بوده است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Investigation about the Pattern of the Sustainable Form of Kermanshah City Using Quantitative Methods

نویسنده [English]

  • Mostafa Shahinifar
Assistant Professor of Geography, Department of Geography, University of Payame-Noor, Kermanshah, Iran
چکیده [English]

Introduction
In the recent decades, rapid horizontal expansion of cities in all countries around the world has been faced with serious challenges. This phenomenon is not only the issues largely affected by urban policy, but the consequences of the intensification of economic, social, political, and environmental management of the communities involved. This was due to the concerns of the developing countries, particularly after World War II, to take measures to resolve the crisis or to inhibit. The main areas of policy measures are tall building, mass, changes in tax laws, rules and regulations for the use of land, improvement and renovation of old texture. There are two competing models of sustainable urban development. On the one side, there are those who support compact cities. The idea here is that large, dense and concentrated cities will support the principles of sustainable development. However, on the other side, there are those who support the green city, i.e., a more open type of urban structure, where buildings, agricultural fields and other green areas form kind of mosaic-like pattern. The rapid development and spread of the urban and adopting policies and strategies to increase density dispersed urban growth and led to the entry of such amendments, compact city. There is a problem that the term urban sprawl is widely used in many disciplines dealing with urban development and urban form. The smart growth has been implemented in the literature. Compared with the pattern or distribution of horizontal growth, more and better benefits of smart growth pattern can help improve the quality of life in cities. Smart growth will try to accommodate urban development within the existing framework, developed to prevent uncontrolled urban expansion. In addition, it can also contribute to improvement of the community, while the horizontal growth pattern is not consistent with sustainable urban development, the negative consequences of such a model, including the loss of agricultural land around the city, and soil degradation and water pollution, air pollution, increase in the cost of municipal services, increase in travel time to the city, and the subsequent increase in fossil fuel consumption, social segregation, lack of land use or irregular use of resources . The extension of the distance between the place of residence, place of business, commercial centers, and recreation centers makes it more dependent on private cars and people are forced to travel long distances to use private cars. Use of personal vehicles due to environmental factors such as pollution (air, noise and radio ...) leads to higher energy consumption. This also leads to wasting time, money and mental and neurological disorders. Accordingly, this study sought to examine Kermanshah urban growth pattern in the last few decades in terms of sustainability.
 
Methodology
The methodology of this article is based on descriptive method. With this approach to urban sustainability, it explains the differences between two types of sprawl and compact urban development. This study has used Gini coefficient, entropy relative Shannon for detection of unbalanced distribution. On the other hand, other indicators like Gary and Moran coefficients have been used to determine the degree of concentration or density and distribution of population and employment based on the spatial correlation. Finally, the model is used to measure urban growth model Holdren.
 
Results and Discussion
The results of this research show that the population density of Kermanshah has dropped during the past decades. Between 1956 and 2011 the population density of this city decreased from 414 persons per hectare to 81. Other results show growth pattern of the city of Kermanshah somewhat scattered, according to the calculations made by the coefficients of Genie and entropy relative Shannon and inequality and imbalance in the distribution of population in urban areas. The data obtained from Moran and Geary coefficients indicate that the growth pattern of the city is closer to the random pattern. The calculations made by Holdren model also show that physical growth of Kermanshah from 1956 to 2011 is only 55 percent of population growth and 45 percent of the growth is horizontal (sprawl). These results indicate that during this period, the city is faced with reduction of net density population and increase in per capita gross of land.
 
Conclusion
This paper addresses the issue of urban growth pattern of Kermanshah in recent decades in the direction of sustainability. The questions based on the research conducted, is whether it is possible to achieve a sustainable urban form?  What is the relationship between sustainability and urban form? The study has shown that the calculations were based on the growth pattern of the city of Kermanshah. Gini coefficient and the relative Shannon entropy is somewhat sparse and with inequalities and imbalances in the distribution of population in urban areas. It is evident that the figures obtained from Moran and Geary coefficients indicate that the growth pattern of the city and closer to a random pattern of distribution tends to be Holdren model. The calculations have revealed that 45% of the city horizontal physical growth (sprawl) has been as the horizontal distribution pattern of urban growth in developing countries as well as developed countries. It is becoming more common. The main features of this model include: relief and fled and dispersed development, commercial strip development, low density, and single-user development.
The results also indicate that the growth pattern of the city of Kermanshah has tendency toward fragmentation and inequality and imbalance in the distribution of population in urban areas. This is a major cause of instability in the city given the importance of direct development towards sustainability; the need to change the scattered pattern is emphasized on compact city.

کلیدواژه‌ها [English]

  • compact city
  • Distribution
  • Kermanshah
  • Sustainable urban development
  • Urban form

شکری فیروزجاه، پری، 1390، تأثیرپراکنشفضاییکاربری‌هایشهریتبریزبرآلودگیهوا، مجلۀ پژوهش‌های بوم­شناسی شهری، دورة دوم، شمارة 3، صص 75- 82.

رهنما، محمدرحیم و غلام­رضا عباس­زاده، 1387، اصول، مبانی و مدل‌های سنجش فرم کالبدی شهر، انتشارات جهاد دانشگاهی مشهد، مشهد.

مرکز آمار ایران، 1385، سرشماری عمومی نفوس و مسکن استان کرمانشاه.

مهندسین مشاور طرح و آمایش، 1378، طرح تجدیدنظر طرح جامع شهر کرمانشاه.

تقوایی، مسعود و محمدحسین سرایی، 1383، گسترش افقی شهرها و ظرفیت‌های موجود زمین (مورد: شهر یزد)، فصلنامة تحقیقات جغرافیایی، دورة نوزدهم، شمارة 73، صص 187- 210.

سیف­الدینی، فرانک و دیگران، 1391، تبیینپراکنشوفشردگیفرمشهریدرآملبارویکردفرمشهریپایدار، پژوهش‌های جغرافیای انسانی، دورة چهل­وچهارم، شمارة 80، صص 155- 176.

عزیزی، محمدمهدی، 1382، تراکم در شهرسازی، اصول و معیارهای تعیین تراکم شهری، انتشارات دانشگاه تهران، تهران.

ابراهیم‌زاده آسمین، حسن، ابراهیم­زاده، عیسی و محمدعلی حبیبی، 1389، تحلیلی بر عوامل گسترش فیزیکی و رشد اسپرال شهر طبس پس از زلزله با استفاده از مدل آنتروپی هلدرون، مجلة جغرافیا و توسعه، دورة هشتم، شمارة 19، صص 25- 46.

قرخلو، مهدی و سعید زنگنه شهرکی، 1388، شناخت الگوی رشد کالبدی- فضایی شهر با استفاده از مدل‌های کمی (مطالعة موردی:شهر تهران)، مجلة جغرافیا و برنامه‌ریزی محیطی، سال بیستم، شمارة 2، صص 19- 40.

قربانی، رسول و سمیه نوشاد، 1387، راهبرد رشد هوشمند در توسعة شهری، اصول و راهکارها، مجلة جغرافیا و توسعه، شمارة 12، صص 163- 180.

حکمت­نیا، حسن و میرنجف موسوی، 1385، کاربرد مدل در جغرافیا با تأکید بر برنامه‌ریزی شهری و ناحیه­ای، انتشارات علم نوین، یزد.

پورمحمدی، محمدرضا و محمد جام کسری 1390، تحلیلی بر الگوی توسعۀ ناموزون تبریز، فصلنامة تحقیقات جغرافیایی، سال بیست­وپنجم، شمارة 100، صص 31- 54.

لی، جی و دیوید وانگ، 1381، تجزیه و تحلیل آماری با Arc View GIS، ترجمة محمدرضا حسین­نژاد و فریدون قدیمی عروس محله، انتشارات مرکز انتشارات دانشگاه علم و صنعت ایران، تهران.

 

Azizi, M. M., 2003, Density in Urban Planning, University of Tehran Press, Tehran. (In Persian)

Ebrahimzadeh Asemin, H., Ebrahimzadeh, I. and Habibi, M. A., 2010, An Analysis of Physical Expansion and Growth Factors Sprawl Tabas Earthquake after using Holdern Entropy, Environment and Development, Vol. 8, No. 19, PP. 25-46. (In Persian)

Frey, H., 1999, Designing the City, Towards a More Sustainable Form, E & FN Spon.

Gharakhlou, M. and Zangeneh Shahraki, S., 2009, The Identifying Spatial Growth Pattern of Cities with Regard to Quantities Models: Tehran, Journal of Geography and Environmental Planning, Vol. 20, No. 34, PP. 19-40. (In Persian)

Ghorbani, R., and Nooshad, S., 2008, Smart Growth Strategies in Urban Development Principles and Practices, Journal of Geography and Development, Vol. 6, No. 12, PP. 163-180. (In Persian)

Glaster, G. h., Aanson, R., Ratcliff, M. and Wolman, H., 2001, Wrestling Sprawl to the Ground: Defining and Measuring an Elusive Concept, Housing policy Debate, Vol. 16, Issue 4, PP. 687-698.

Hekmatnia, H. and Mousavi, M., 2006, Model Application in Geography With Emphasis on Urban and Regional Planning, Elme Novine Publications, Yazd. (In Persian)

Hess, G. R., 2001, Just What is Sprawl, Anyway, www4.ncsu/grhess

Holden, E., 2004, Ecological Footprint and Sustainable Urban Form, Journal of Housing and the Built Environment, N.19, PP. 91-109. Kluwer Academic Publishers, Printed in the Netherlands.

Kidokoro, Tetsue, et al., 2008, Sustainable City Regions: Space, Place and Governance, Springer.com.

Lee, J., and David W. S. Wong, 2002, Statistical Analysis by Arc View GIS, Translated by: Hosseinnejad, M. R. and Ghadimi, F., Iran University of Science and Technology Press, Tehran. (In Persian)

Litman, T., 2005, Evaluating Criticism of Smart Growth, Victoria Transport policy Institute, http://www.vtpi.org

Parfrey, Eric., 2002, Stop Sprawl, Sierra Club, www.sierra club.org

Pourmohammadi, M. and Jamekasra, M., 2011, An Analysis of the Patterns of Uneven Development, Tabriz, Geographical Research Quarterly, Vol. 25, No.100, PP. 31-54. (In Persian)

Rahnama, M. R. and Abbaszadeh, G. H., 2008, Fundamental and Model of Urban Form Measuring, Jihad Daneshgahi Mashhad Publication, Mashhad. (In Persian)

Seifoddini, F., et al, 2012, Explanation and Dispersion and Compactness of Urban Form in Amol City, Considering Sustainable Urban Form, Human Geography Research quarterly, Vol. 44, No. 80, PP. 155-176. (In Persian)

Shokri Firouzjah, Pari, 2011, Effect of Spatial Dispersion of Urban Land use of Tabriz on the Air Pollution, Journal of Urban Ecological Researches, Vol. 2, No. 3, Spring & Summer 2011, PP. 75-82. (In Persian)

Taghvaei, M. and Saraei, M. H., 2004, The Horizontal Expansion of Cities and the Capacity of the Land (Case study: Yazd City), Geographical Research Quarterly, Vol. 19, No.73, PP. 187-210. (In Persian)

Wassmer, R.W., 2002, Influences of the Fiscalization of Land Use and Urban-Growth, Journal of the American planning Association, Vol. 55, PP. 23-37.

Wassmer, R. W., 2002, Influences of the Fiscalization of Land Use and Urban-Growth Boundaies, www.csus.edu/ indiv/w/wassmerr/sprawl.html.

www.kermanshahcity.ir.

Zhang, T., 2000, Land Market Forces and Government’s Role in Sprawl, Cities, Vol. 17, No. 2, PP. 123-135.