شبیه سازی تعیین عمق کارگذاری ستون شن در سه بافت خاک برای سامانه آبیاری قطره ای درخت سیب

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار، گروه علوم و مهندسی آب، دانشکده کشاورزی و منابع طبیعی، دانشگاه بین‌المللی امام خمینی (ره)، قزوین، ایران.

2 دانشجوی کارشناسی ارشد مهندسی آبیاری و زهکشی، گروه علوم و مهندسی آب، دانشکده کشاورزی و منابع طبیعی، دانشگاه بین‌المللی امام خمینی (ره)، قزوین، ایران.

3 دانشجوی دکتری مهندسی آبیاری و زهکشی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج، ایران.

چکیده

سامانه‌های آبیاری قطره‌ای، روش مناسبی برای تامین آب مورد نیاز گیاهان در محیط ریشه می‌باشد. مدیریت این روش متکی بر علم توزیع آب در حجم خاک مرطوب است. مدل‌های شبیه‌سازی می‌تواند در بدست‌آوردن این دانش ارزشمند بکار گرفته شوند. در این پژوهش شبیه‌سازی ستون شن در منطقه ریشه درخت سیب تحت سامانه آبیاری قطره‌ای به منظور تعیین عمق بهینه ستون شن در سه بافت خاک مختلف برای بررسی نحوه جذب آب توسط ریشه، مقدار آب مصرفی، میزان تبخیر و نفوذ عمقی با استفاده از مدل HYDRUS-2Dمورد بررسی قرار گرفت. نتایج حاصل از این پژوهش نشان داد در بافت خاک لوم زمانی که عمق ستون شن در بازه 10-15 سانتی‌متری و در بافت خاک سیلتی لوم ستون شنی به عمق 5 تا 10 سانتی‌متری قرار گیرد، میزان نفوذ، آب مصرفی و تبخیر نسبت به حالت ماکزیمم به میزان قابل ملاحظه‌ای کمتر خواهد بود به‌طوری که میزان نفوذ عمقی در بافت خاک سیلتی لوم‌ به میزان 55 درصد و در بافت خاک لوم 35 درصد نسبت به حالت ماکزیمم کاهش داشته است و در نهایت سناریو‌های بررسی شده نشان داد در بافت خاک لوم‌شنی، به دلیل سبک‌بودن بافت خاک استفاده از ستون‌شن وضعیت بهبود دهنده‌ای را ایجاد نخواهد کرد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Simulation of Determining the Depth of Sand Column Placement in Three Soil Textures for Apple Tree Drip Irrigation System

نویسندگان [English]

  • Masoud Soltani 1
  • Mohadese Sadat Fakhar 2
  • Hossein Rabbaniha 3
1 Assistant Professor, Department of Water Sci. and Eng., Faculty of Agricultural and Natural Resources, Imam Khomeini International University, Qazvin, Iran.
2 M.Sc. Student of Irr. & Dra. Eng. Department of Water Sci. and Eng., Faculty of Agricultural and Natural Resources, Imam Khomeini International University, Qazvin, Iran.
3 Ph.D. Student of Irr. and Dra. Eng. Department of Irrigation and Reclamation Eng., College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran.
چکیده [English]

Drip irrigation systems are a proper technique to supply water for plants in the root zone. The management of this method relies on the science of water distribution in the volume of wet soil. Simulation models can be used to obtain this valuable knowledge. In this study, simulation of sand column in the root zone of apple tree under drip irrigation system was done to determine the optimal depth of the sand column in three various soil textures to investigate how water is uptake by the roots, water consumption, evaporation rate and deep penetration using The HYDRUS-2D model was examined. The results of this study showed that in the loam soil texture when the depth of the sand column is in the range of 10-15 cm and in the silty loam soil texture of the sand column to a depth of 5 to 10 cm, the rate of infiltration, water consumption and evaporation will be significantly less than the maximum so that the rate of deep penetration in the silty loam soil texture has decreased by 55% and in the loam soil texture by 35% compared to the maximum state. and finally, the studied scenarios showed that in sandy loam soil texture, due to the lightness of soil texture, the use of sand columns will not create an improving situation.

کلیدواژه‌ها [English]

  • Deep percolation
  • HYDRUS-2D
  • Irrigation management
  • Optimal depth
  • Root uptake

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مدیریت آب و آبیاری
دوره 11، شماره 4
بهمن 1400
صفحه 829-843

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