ارزیابی فنی سامانه‌های آبیاری قطره‌ای اجراشده در شهرستان ثلاث باباجانی استان کرمانشاه

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه مهندسی آب، پردیس کشاورزی و منابع طبیعی، دانشگاه رازی، کرمانشاه، ایران.

10.22059/jwim.2023.361893.1087

چکیده

ارزیابی سیستم‌های آبیاری به‌منظور تعیین عملکرد بهینه، اصلاح و مدیریت آن‌ها، امری ضروری است. در این پژوهش پنج سیستم آبیاری قطره‌ای در شهرستان ثلاث باباجانی واقع در استان کرمانشاه، انتخاب و براساس دستورالعمل اداره حفاظت خاک آمریکا (SCS) و روش مریام و کلر ارزیابی گردیدند. بررسی‌ها نشان داد که مساحت خیس‌شده نسبت به مساحت کل بین 89/14 تا 49/33 درصد متغیر بوده است. حداقل و حداکثر مقدار یکنواختی پخش آب در سیستم‌های بررسی‌شده (EUs) به‌ترتیب 49/29 و 56/62 درصد تعیین شد. مقادیر راندمان پتانسیل کاربرد ربع پایین (PELQs) و راندمان کاربرد ربع پایین (AELQs) سامانه‌ها به‌ترتیب در محدوده بین 83/26 تا 3/53 و 48/29 تا 56/62 درصد نوسان داشت که این مقادیر بیانگر عملکرد ضعیف سیستم‌ها در تمام مزارع می‌باشد. با توجه به مقادیر شاخص اشباع لانژیلر (LSI) به‌دست‌آمده از منابع آبی در مزارع موردمطالعه، در دو مزرعه تمایل رسوب کربنات کلسیم وجود داشت، اما در سایر مزارع این خطر رسوب‌گذاری وجود نداشت. به‌طورکلی، عملکرد ضعیف سیستم‌ها به دلایل مختلفی ازجمله عدم نصب ایستگاه کنترل مرکزی یا سیستم فیلتراسیون مناسب در سامانه‌ها، کم‌بودن مساحت خیس‌شده، نامناسب‌بودن نوع و تعداد قطره‌چکان‌ها، گرفتگی قطره‌چکان‌ها، اختلاف فشار در سیستم‌ها، نامناسب‌بودن فشار و توزیع غیریکنواخت آن ها، نامناسب‌بودن دور و مدت ‌زمان آبیاری و درنهایت مدیریت ضعیف بهره‌برداری بود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Technical Evaluation of Drip Irrigation Systems Implemented in Salas Babajani City of Kermanshah Province

نویسندگان [English]

  • Houshang Ghamarnia
  • habib abasi
  • Bahman Farhadi Bansouleh
Department of Water Engineering, Campus of Agriculture and Natural Resources, Razi University, Kermanshah, Iran.
چکیده [English]

It is necessary to evaluate irrigation systems in order to determine their optimal performance, modify and manage them. In this research, five drip irrigation systems in Salas Babajani city located in Kermanshah province were selected and evaluated based on the instructions of the American Soil Conservation Service (SCS) and Merriam and Keller methods. The results of investigations showed that the wetted area ranged between 14.89 and 33.49 percent of the total area. The minimum and maximum values of water distribution uniformity in the investigated systems (EUs) were determined as 29.49 and 62.56 percent, respectively. The values of lower quartile application potential efficiency (PELQs) and lower quartile application efficiency (AELQs) of the systems fluctuated between 26.83 to 53.3 and 29.48 to 62.56 percent, respectively, which indicate the poor performance of the systems in all fields. According to Langiller Saturation Index (LSI) values obtained from water sources in the fields under study, in two fields, there was a tendency for calcium carbonate precipitation, but in other fields, there was no risk of precipitation. In general, the poor performance of the systems were due to various reasons, such as: not installing a central control station or a suitable filtration system, insufficient wetted area, inappropriate type and number of droppers, clogging of the droppers, pressure difference in the systems, inappropriate pressure and its uneven distribution, inappropriate distance and duration of irrigation and finally the poor management of exploitation.

کلیدواژه‌ها [English]

  • Actual Efficiency
  • coefficient distribution
  • Drip irrigation
  • Evaluation
  • Langer saturation index
  • Potential efficiency
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