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بهبود برآورد عملکرد محصول در مدل شبیهسازی SWAP با استفاده از دادههای ماهوارهای | ||
تحقیقات آب و خاک ایران | ||
مقاله 2، دوره 45، شماره 4، دی 1393، صفحه 379-388 اصل مقاله (514.38 K) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22059/ijswr.2014.52590 | ||
نویسندگان | ||
علیرضا بادیه نشین1؛ حمیده نوری* 2؛ مجید وظیفهدوست3 | ||
1کارشناس ارشد آبیاری و زهکشی گروه آبیاری و آبادانی پردیس کشاورزی و منابع طبیعی دانشگاه تهران | ||
2استادیار گروه آبیاری و آبادانی پردیس کشاورزی و منابع طبیعی دانشگاه تهران | ||
3استادیار گروه مهندسی آب دانشگاه گیلان | ||
چکیده | ||
به منظور برآورد عملکرد گیاهان در سطوح وسیع، از روش بهروزرسانی مدلهای رشد گیاه با دادههای ماهوارهای استفاده میشود. هدف این تحقیق تعیین میزان بهبود برآورد عملکرد محصول در مدل شبیهسازی SWAP با استفاده از این روش بود. این تحقیق در سال زراعی 1390ـ 1391 در سه سامانة آبیاری عقربهای، واقع در شبکة آبیاری قزوین، تحت کشت گیاهان ذرت علوفهای و چغندرقند، انجام شد. اجرای مدل SWAP در دو مرحلة بدون بهروزرسانی و با بهروزرسانی با شاخص سطح برگ ماهوارهای انجام شد. برآورد عملکرد محصول چغندرقند و ذرت با مدل SWAP بهروزرسانیشده بهترتیب 7/13 و 5/14 درصد در مقدار درصد خطا و 321/3 و 621/1 تن بر هکتار در مقدار RMSE بهبود یافت. نتایج بهدستآمده نشان داد با بهروزرسانی شاخص سطح برگ ماهوارهای میتوان خطاهای دادههای ورودی مدل و عدم قطعیت موجود در آنها را به میزان زیادی کاهش داد و با دقت مطلوبی عملکرد را در سطح وسیع و با تفکیک مزرعه به مزرعه برآورد کرد. | ||
کلیدواژهها | ||
ذرت علوفهای؛ سنجش از دور؛ شاخص سطح برگ؛ چغندرقند؛ مدل SWAP | ||
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