تجزیه و تحلیل پویایى چشم ‏انداز شهرى با استفاده از تصاویر چند زمانه ماهواره ‏اى: مقایسه دو شهر نفتى

نوع مقاله: مقاله پژوهشی

نویسندگان

1 استادیار دانشگاه پیام ‏نوردانشجوى دکترى جغرافیا و برنامه ‏ریزى شهرى

2 دانشجوى دکترى جغرافیا و برنامه‏ ریزى شهرى دانشگاه تربیت معلم تهران

چکیده

شهرنشینى شتابان در نتیجه رشد جمعیت و مهاجرت از روستا به شهر، فرایندى بحرانى در نواحى شهرى محسوب مى‏ گردد. این مطالعه، پویایى چشم ‏انداز را با استفاده از تصاویر چند زمانه ماهواره ‏اى دو شهرنفتى یعنى هاستون از ایالت تکزاس در ایالات متحده و داکینگ از ایالت هیلونگجیانگ در چین، بررسى مى‏ نماید. اگر چه هر دو شهر تحت زمینه ‏هاى متفاوت اجتماعى- سیاسى قرار داشته‏ اند، اما توسعه آنها در 50 سال اخیر بر پایه نفت بوده است. با مقایسه الگو و پویایى چشم ‏انداز در این دو شهر، مى ‏توانیم بفهمیم که شهرنشینى در این دو شهر نفتى، بر الگوى چشم ‏انداز، به ویژه بر چشم‏ انداز طبیعى مؤثر بوده است. یک سرى از شاخص هاى چشم ‏اندازها با مفاهیم تکمیلى اکولوژیکى جهت سهولت تجزیه و تحلیل پویایى‏ شناسى فضایى در طول یک فاصله زمانى 20 ساله انتخاب شده‏ اند. براساس شاخص هاى مکتسبه، روندى عمومى در تغییر چشم ‏انداز در این دو شهر آشکار گردیده است. از زمانى که چشم ‏انداز انسانى نظیر نواحى مسکونى به طور وسیعى جایگزین سایر طبقات طبیعى مى‏ شوند، چشم‏ اندازهاى طبیعى نظیر مراتع و تالاب ها از بین رفته یا به صورت الگوى ناهمگون‏ ترى قطعه قطعه گردیده ‏اند.
 

کلیدواژه‌ها


عنوان مقاله [English]

Dynamic Analysis of Urban Outlook Using Multi-Time Satellite Images: Comparison of two oil cities

نویسندگان [English]

  • Mohammad Mireh 1
  • Esmael Aghaiizadeh 2
1 Assistant Professor of Payame Noor University
2 Ph.D. Student in Geography and Urban Planning Tarbiat Moallem University of Tehran
چکیده [English]

Rapid urbanization as a result of population growth and migration from village to city, is considered a critical process in urban areas. This study examines the dynamics of the landscape using multi-time satellite images of two cities, the Houston of the state of Texas in the United States and Daqing of the state of Heilongjiang in China. Although the two cities have been in different socio-political contexts, the development of both has been based on oil over the last 50 years. By comparing the pattern and dynamics of the landscape in these two cities, we can understand that urbanization in these two oil cities has been effective in landscape pattern, especially in the natural landscape. A series of landscape indicators are selected along with ecological complementary concepts for ease of analysis of spatial dynamics during a 20-year interval. Based on the obtained indicators, a general trend in the changes of the landscape in these two cities has become evident. Since human landscape, such as residential areas, is widely replaced by other natural classes, natural landscapes such as pastures and wetlands have been eroded or have been cut into inconsistent patterns.

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