بررسی و مقایسۀ پایگاه‏ دادۀ نقشه‌های کاربری اراضی در حوضۀ آبریز دریاچۀ ارومیه

نوع مقاله : پژوهشی

نویسندگان

1 کارشناسی ارشد سنجش از دور، مرکز تحقیقات سنجش از دور (RSRC)، دانشگاه صنعتی شریف، تهران

2 دانشیار، دانشکدۀ علوم و فنون نوین، دانشگاه تهران

3 کارشناسی ارشد اکوهیدرولوژی، دانشکدۀ علوم و فنون نوین، دانشگاه تهران

4 استاد، دانشکدۀ مهندسی عمران و مدیر مرکز تحقیقات سنجش از دور (RSRC)، دانشگاه صنعتی شریف، تهران

چکیده

نقش مهم کاربری و پوشش‏های موجود در سطح حوضۀ آبریز دریاچۀ ارومیه روی مصارف آبی این منطقه به‏منظور مدیریت بهتر آب در حوضه، باعث شده که داشتن دانش عمیق از اطلاعات پایه از جمله آرایش اراضی و نوع کاربرد آن ضروری باشد. متأسفانه، منابع اطلاعاتی و آماری موجود در مورد وضعیت کاربری حوضه، پراکنده، ناکافی و گاه متناقض هستند. مطالعۀ پیش رو به‏عنوان یکی از جنبه‏های مهم اثرگذار بر حل مسئلۀ دریاچۀ ارومیه، به شناسایی پایگاه‏های ارائه‏دهندۀ نقشه‏های کاربری اراضی از تصاویر ماهواره‏ای، بررسی دقت نقشه‏های خروجی از این پایگاه‏ها و مقایسۀ آنها با نقشۀ کاربری تولید‌شده به روش شی‏ءگرا با استفاده از نرم‌افزار eCognition پرداخته است. نتایج ارزیابی دقت کلی نقشه‏ها بیانگر آن است که نقشه‏های کاربری اراضی استخراج‌شده از محصولات جهانی LCtype و GLCF عملکرد مناسبی دارند و Globecover نتایج ضعیفی در این زمینه ارائه داده است. بهترین انطباق در نتایج محصول سنجندۀ MODIS وجود داشت، چراکه محصول سنجندۀ MODIS نه تنها در ابعاد پیکسل نسبت به بیشتر محصولات بهتر است، بلکه از نظر توالی زمانی طولانی‏ترین مدت استخراج نقشۀ کاربری اراضی را دارد. نتایج این محصول در بررسی با نقشۀ تولید‌شده به روش شیء‏گرا نیز همخوانی مناسبی داشت. بنابراین، توصیه می‏شود از محصول MODIS در مطالعات مربوط به حوضۀ دریاچۀ ارومیه استفاده شود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Investigation and comparison of land use map database in the Urmia lake basin

نویسندگان [English]

  • fatemeh kordi 1
  • Hossein Yousefi 2
  • leila ghasemi 3
  • Masoud Tajrishy 4
1 Tehran university
2 Department of Renewable Energies and Environment, Faculty of New Sciences and Technologies, University of Tehran
3 University of Tehran
4 Professor, Faculty of Civil Engineering, Sharif university of Technology, Tehran
چکیده [English]

The important role of land use and land cover in the Lake Urmia basin on the water consumption of this area due to better water management in the basin, has made it necessary to have in-depth knowledge of basic information such as land use and land cover. Unfortunately, the available information and statistical sources about LU/LC of basin sometimes are insufficient and contradictory. This study, as one of the important aspects affecting the address of the Urmia Lake issue, has determined the databases that provide land use maps from satellite images, also it examines the accuracy of these global products and compares them with the map which is created by object oriented method with eCognition software. The results of the overall accuracy assessment of the maps illustate that the land use maps extracted from the LCtype and GLCF global products are performing well, and Globecover has provided poor results in this regard. There was the best fit in the results of the MODIS product, so that the MODIS product is not only better in pixel dimensions than most products, but also has the longest land use extraction time in terms of time sequence. The results of this product in the study were in good agreement with the map produced by the object-oriented method, therefore it is recommended to use the MODIS land use product in studies related to the Urmia Lake basin.

کلیدواژه‌ها [English]

  • Urmia Lake Basin
  • Land use
  • global products
  • object-oriented
  • MODIS
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