آشکارسازی تغییرات کاربری و بررسی تاثیر آن بر دامنه‌های دمایی در منطقه یک شهر شیراز

نوع مقاله : مقاله کوتاه

نویسندگان

1 دانشکده علوم زمین، دانشگاه شهید بهشتی، تهران

2 دانشگاه یزد، یزد

چکیده

آشکارسازی بهنگام و دقیق تغییرات ویژگی­های سطح زمین، برای درک بهتر روابط و برهمکنش­های بین پدیده­های انسانی و طبیعی، برای اتخاذ تصمیم­های مناسب در مدیریت شهری بسیار اهمیت دارد. برای آشکارسازی این تغییرات در دهه­های اخیر به طور گسترده­ای از داده­های ماهواره­ای به عنوان منابع اولیه استفاده شده است. در این پژوهش، تغییرات صورت گرفته در کاربری و درصد نمایه بهنجار شده پوشش گیاهی  و تاثیر آن بر الگوهای دمایی در دوره زمانی 25 ساله در محدوده منطقه یک شهر شیراز بررسی شده است. بدین برای دو مورد از تصاویر سنجنده TM ماهواره لندست به تاریخ 2 نوامبر سال 1986 و 7 آگوست سال 2011 انتخاب و با استفاده از نرم­افزار ERDAS IMAGINE 9.2 دمای سطح زمین و میزان شاخص پوشش گیاهی و همچنین طبقه­بندی نظارت شده با اعمال خوارزمیک بیشترین شباهت، کاربری­های شهری استخراج شد. یافته­های پژوهش نشان داد طی دوره‎ای که پژوهش انجام می­شد 4 کیلومتر مربع از کاربری پوشش گیاهی و63/8 کیلومتر مربع بایر در منطقه دچار کاهش مساحت و 17/13 کیلومترمربع از کاربری شهری با افزایش مساحت همراه بوده است. بیشترین کاهش سطح مربوط به کلاس پوشش گیاهی بسیار قوی و بیشترین افزایش سطح مربوط به سطوح فاقد پوشش است. همچنین یافته­های پژوهش آشکار کرد با تغییرات کاربری به­وجود آمده الگوهای دمایی دچار پراکنش بیشتر و تغییر دامنه­های دمایی شده است.

کلیدواژه‌ها

عنوان مقاله [English]

Land Use Change Detection and its Effects on the Temperature Range in the One Zone City of Shiraz

نویسندگان [English]

  • Mahmuod Ahmadi 1
  • Mahdi Narangifard 2
1 Faculty of Earth Sciences, Shahid Beheshti University Tehran
2 Faculty of Human Science, University of Yazd,Yazd
چکیده [English]

Timely and accurate detection of changes in surface features, to better understand the relationships and interactions between human and natural phenomena, the right decision is very important in urban management. To Detection these changes widely in recent decades, satellite data have been used as primary sources. This study examines the use of vegetation changes and their impact on temperature patterns in a time period of 25 years within the city of Shiraz one area is made. LANDSAT satellite TM sensor data for the two series on 1986/10/7 and 2011/10/7 ERDAS IMAGINE 9.2 software selection and use land surface temperature (LST) And vegetation indices as a supervised classification algorithm with the maximum likelihood was obtained for urban. The findings showed that over the period of 4 and 63/8 km2 for the loss of vegetation and barren land and 17/13 km2 from the city for the area has been increased. Most lowly the level of the class is very strong vegetation and the greatest increase in of the level is barren. The findings also reveal for changes occurring with temperature patterns and changed most of the distribution is temperature ranges.

کلیدواژه‌ها [English]

  • Change detection
  • Land use
  • Temperature Patterns
  • TM Sensor
  • Shiraz One Zone

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فصلنامه علوم محیطی
دوره 13، شماره 2
تیر 1394
صفحه 111-120

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