تحلیل الگوی فضایی وضعیت خشکسالی در زاگرس میانی و جنوبی با استفاده از شاخص های سنجش ازدور

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده منابع طبیعی و محیط زیست، دانشگاه آزاد اسلامی واحد علوم و تحقیقات تهران

2 پژوهشکده حفاظت خاک و آبخیزداری سازمان تحقیقات و آموزش و ترویج کشاورزی

3 گروه سنجش از دور و GIS، دانشکده منابع طبیعی و محیط زیست، دانشگاه آزاد اسلامی واحد علوم و تحقیقات تهران

‎10.22052/deej.2022.113659

چکیده

خشکسالی یکی از جدی ترین مخاطرات طبیعی است که بر کیفیت زندگی همه موجودات زنده تاثیرگذار است. ایران سرزمینی کم باران که طی اعصار، با تهدید این مخاطره طبیعی مواجه بوده است. هدف این مطالعه بررسی شاخص های سنجش از دوری موثر بر تحلیل خشکسالی و تبیین الگوی خودهمبستگی فضایی در زاگرس میانی و جنوبی می باشد. در این راستا با بهره از آمار روزانه بارش 103 ایستگاه هواشناسی طی دوره های زمانی 2000  تا  2019 داده های مورد نیاز تهیه و مقادیر SPI متناظر ایستگاه های مذکور مربوط به ایستگاه های هواشناسی استخراج گردید. سپس شاخص های NDVI  ،  VCI، TCI ، VHI ، DDI ، NDDI ، EVI ،  NDWI  و  SAVI بر تصاویر سنجنده مادیس اعمال و نقشه های خشکسالی تهیه گردید و عوامل موثر، به کمک تحلیل عاملی و الگوی فضایی شاخص خشکسالی با شاخص های سنجش از دور و تحلیل فضایی، تجزیه و تحلیل شدند. نتایج حاکی از کارآیی بهتر شاخص­های SAVI، NDVI، VCI و EVI در بررسی خشکسالی بوده است. همچنین، شاخص SPI با بیشتر شاخص های پوشش گیاهی، الگوی خودهمبستگی فضایی مثبتی را نمایان کرده است. این در حالی است که در بین شاخص­های یاد شده VHI کمترین اثربخشی را تحلیل خشکسالی ارائه نمود

کلیدواژه‌ها

عنوان مقاله [English]

Spatial pattern analysis of drought situation in Central and South Zagros using remote sensing indicators

نویسندگان [English]

  • Salar Mirzapour 1
  • , Mir Masoud Kheirkhah Zarkash 2
  • Zahra Azizi 3
1
2
3
چکیده [English]

Drought is one of the most serious natural hazards that affects the quality of life of all living things.  Iran is a low-rainfall land that has been threatened by this natural hazard for centuries. The purpose of this study was to evaluate the remote sensing indicators effective on drought analysis and explain the pattern of spatial autocorrelation in the central and southern Zagros.  In this regard, using the daily rainfall statistics of 103 meteorological stations during the period 2000 to 2019, the required data were prepared and corresponding SPI values ​​were extracted from 103 location points related to meteorological stations.

کلیدواژه‌ها [English]

  • Drought
  • Zagros
  • SAVI
  • NDVI
  • VCI
  • EVI
  • SPI index

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مهندسی اکوسیستم بیابان
دوره 11، شماره 35
شهریور 1401
صفحه 1-14

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