ارزیابی تناسب اراضی با استفاده از روش TOPSIS و مقایسه آن با روش‎های پارامتریک برای محصول ذرت در بخشی از اراضی قزوین

نوع مقاله : مقاله پژوهشی

نویسندگان

1 عضو هیأت علمی گروه مهندسی علوم خاک، پردیس کشاورزی و منابع طبیعی دانشگاه تهران

2 گروه علوم و مهندسی خاک، پردیس کشاورزی و منابع طبیعی دانشگاه تهران

چکیده

ارزیابی تناسب اراضی با روش­های پارامتریک (استوری و ریشه دوم) گاهی با واقعیت منطقه بدلیل مقادیر پایین شاخص بدست آمده هم­خوانی ندارد، لذا استفاده از روش­های نوین تصمیم­گیری چندمعیاره که اثرات متقابل معیارها را در نظر می­گیرند از جمله روش نوین TOPSIS، می­توانند مورد بررسی قرار گیرند. بر­اساس روش نمونه­برداری شبکه­ای، تعداد 22 خاک­رخ در 8210 هکتار حفر و از افق­های ژنتیکی نمونه­برداری بعمل آمد. نمونه­ها مورد تجزیه فیزیکی و شیمیایی قرار گرفت و بر­اساس تلفیق نقشه واحدهای خاک و شیب، تعداد 17 واحد اراضی استخراج و در نهایت، نقشه­های تناسب اراضی برای هر سه روش پارامتریک استوری، ریشه دوم و TOPSIS در واحدهای اراضی و محیط سامانه اطلاعات جغرافیایی تهیه گردید. مقادیر شاخص تناسب اراضی با میزان عملکرد ذرت علوفه­ایی در واحدهای مورد مطالعه برای روش­های استوری، ریشه دوم و TOPSIS مورد مقایسه قرار گرفت و مقدار ضریب تبیین آنها به ترتیب 76/0، 76/0 و 78/0 بدست آمد. نتایج این پژوهش نشان داد که روش ریشه دوم از اعتبار بیشتری نسبت به دو روش دیگر برخوردار است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Land Suitability Evaluation Using TOPSIS Method and Its Comparison with Parametric Methods for Maize Production in Part of Qazvin

نویسندگان [English]

  • Fereydoon Sarmadian 1
  • Mohammad Javad GHavami 2
1 soil science department, faculty of agricultural engineering and technology, university of Tehran
2 soil science department, faculty of agriculture, university of Tehran, Karaj, Iran
چکیده [English]

Land suitability evaluation by parametric methods (Story and Square Root) are sometimes incompatible with the reality of the field because of the low achieved values of the index. Therefore, the use of new multivariate decision-methods, considering the interactions of the criteria, including the new TOPSIS approach, can be investigated. Based on the grided sampling method, 22 soil profiles were studied in 8210 hectares. The genetic horizons were sampled and physicochemical properties analyzed. Based on the integration of soil unit map and slope, 17 land units were extracted and finally, land suitability maps were prepared for all three Story, Root and TOPSIS parametric methods in land units and GIS. Comparison of the values of land suitability index and yield of corn in the studied units showed that the correlation coefficient are 0.76, 0.76 and 0.78 for Story, TOPSIS and Square root method respectively. The results of this study showed that the Square root method has more validity than the other two methods

کلیدواژه‌ها [English]

  • Land suitability evaluation
  • Parametric method (Storie and Square root)
  • TOPSIS method
  • yield
  • Corn
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