تحلیل تغییرات زمانی مکانی اراضی پردانان پیرانشهر با استفاده از سنجه‌های سیمای سرزمین

نوع مقاله : علمی - پژوهشی

نویسندگان

1 استادیار، گروه علوم آبخیزداری، دانشکده منابع طبیعی، دانشگاه ارومیه، ارومیه، ایران.

2 کارشناسی ارشد آبخیزداری، دانشکده منابع طبیعی، دانشگاه ارومیه، ارومیه، ایران.

چکیده

امروزه گسترش جوامع انسانی و تسلط بیشتر بر محیط زیست، سبب شده تا تغییرات محیطی سریع‌تر و گسترده‌تر از قبل به وقوع بپیوندند. این مسئله وسعت عرصه‌های  طبیعی را کاهش و پراکندگی و انقطاع آن را افزایش می‌دهد. هدف از این پژوهش ارزیابی تغییرات زمانی و توزیع مکانی اراضی پردانان پیرانشهر به کمک سنجش از دور و با استفاده از سنجه‌های سیمای سرزمین در یک بازه زمانی ده ساله است که برای برنامه‌ریزی‌های فعلی و آتی استفاده از سرزمین به‌منظور توسعه پایدار حائز اهمیت می‌باشد. برای تهیه نقشه کاربری اراضی از تصاویر ماهواره‌ای لندست استفاده شد. به‌منظور بررسی تغییرات کاربری اراضی در این بازه زمانی از سنجه‌های تعداد لکّه، تراکم لکّه، درصد پوشش، بزرگ‌ترین لکّه در سطح کلاس و از سنجه‌های تعداد لکّه‌ها، تراکم لکّه، تنوع شانون و پیوستگی در سطح سیمای سرزمین در نرم‌افزار فراگستتس استفاده شد. نتایج پژوهش با استفاده از سنجه‌ها در دو سطح بیانگر آن است که به‌طور کلی، سیمای سرزمین تکه‌تکه‌تر، از نظر شکلی پیچیده‌تر، نامنظم‌تر و از نظر مقدار یکپارچگی عناصر ساختاری، ناپیوسته‌تر (از 01/39 به 06/33 درصد) و از نظر نوع کاربری پوشش موجود در واحد سطح متنوع‌تر (از 04/1 به 15/1) شده است.

کلیدواژه‌ها

عنوان مقاله [English]

Analysis of temporal-spatial variations of land use in Predanan Piranshahr using LandScape Metrics

نویسندگان [English]

  • Habib Nazarnejad 1
  • Morteza Hoseini 2
  • Salar Hamze 2
1 Assistant Professor, Department of Watershed Management Science, Faculty of Natural Resources, Urmia University, Urmia, I. R. Iran.
2 M.Sc. of Watershed Management, Faculty of Natural Resources, Urmia University, Urmia, I. R. Iran.
چکیده [English]

Nowadays, the expansion of human societies and greater environmental dominance have caused more rapid and wider environmental changes to take place. This will reduce the scope of the natural arenas and increase its dispersion and termination. The aim of this research is to evaluate the time variation and spatial distribution of the Piranshahr land plots with the help of remote sensing and land surveying in a ten-year time horizon, which is important for current and future planning of land use for sustainable development. Landsat satellite images were used to prepare land use map. In order to investigate land use changes during this time interval, Fragstats software was used to measure the Number of Patches, Patch density, percentage of Lands, Largest Patch Index metrics in the class level, and the number of patches, patch density, Shannon,s diversity and contagion metrics in landscape level. The results of the research using the metrics at two levels indicate that, in general, the shape of the fragmented landscape is more complex, irregular, and in terms of the integrity of the structural elements, the more discontinuous (from 39.01 to 33.06%) and in terms of type The use of coverage in a more diverse area (from 1.04 to 1.15) has been used.

کلیدواژه‌ها [English]

  • Landscape metrics
  • Land use
  • Piranshahr
  • Spatial distribution

مراجع

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پژوهش و توسعه جنگل
دوره 4، شماره 2
شهریور 1397
صفحه 241-255

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