بررسی آزمایشگاهی تأثیر آرایش منافذ لوله‌های زهکش بر میزان نمک زه آب خروجی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار گروه علوم و مهندسی آب، دانشکده کشاورزی، دانشگاه بوعلی سینا همدان

2 کارشناس ارشد، گروه علوم و مهندسی آب، دانشکده کشاورزی، دانشگاه بوعلی سینا همدان

چکیده

در این تحقیق، با استفاده از مدل فیزیکی، تاثیر سه نوع آرایش منافذ لوله‌ها‌ی زهکش بر میزان نمک زه‌آب خروجی مورد بررسی قرار گرفت. اولین آرایش منافذ برای تخلیه جریان زیرسطحی، دارای چهار ردیف سوراخ موازی در سمت بالا و پایین لوله (M4) بود. دومین آرایش به صورت لوله‌ دارای سه ردیف سوراخ موازی با زاویه قرارگیری 120 درجه نسبت به هم (M3) و در سری سوم یک ردیف سوراخ در قسمت بالای لوله (M1) لحاظ گردید. لوله­های زهکش در دو عمق 20 و 60 سانتی­متر نسبت به سطح خاک و فاصله 60 و 180 سانتی­متر، نصب شدند. نتایج نشان داد در حالت های M1 و M3 سهم آب زیرزمینی مشارکت­کننده در زه­آب خروجی کاهش می­یابد. حالت M4 بیشترین سهم مشارکتی آب زیرزمینی در زه­آب خروجی را دارا بود در حالی­که M1 کمترین سهم مشارکتی را داشت. همچنین تفاوت معنی­داری بین میزان نمک­های خروجی از زهکش با آرایش M4 و M1 وجود داشت. در تمامی موارد، نصب زهکش عمیق منجر به افزایش مقدار نمک خروجی گردید.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Experimental Study of Drainage Pipes’ Openings Arrangement Effect on Drainage Water Salt Load

نویسندگان [English]

  • H nozari 1
  • A pour sadri 2
  • A zali 2
1 Assist. Prof., Water Sci. Eng. Dept., Faculty of Agric., Bu-Ali Sina University, Iran
2 M.Sc. Graduate., Water Sci. Eng. Dept., Faculty of Agric., Bu-Ali Sina University, Iran
چکیده [English]

In this study, effect of three different openings arrangements of drainage pipes on the drainage water salt load was investigated using a physical model. The first arrangement of openings for drainage of the subsurface flow had four parallel rows on the upper and lower sides of the pipe (M4). In the second arrangement the pipes had three parallel rows of openings with 120 degrees apart between the rows (M3) and the third one had one row of holes on top of the pipe (M1). Drainage pipes were installed at 20 and 60 cm depths with spacing of 60 and 180 cm. The results showed that the M1 and M3 cases experienced a decline in the contribution of the groundwater in the drained water. The M4 case had the highest contribution of the groundwater, while the M1 had the lowest one of that. So, there was a significant difference between the drainage salt loads at M4 and M1cases. In all cases, deep drain installation led to increase the drainage water salt load.

کلیدواژه‌ها [English]

  • Electrical conductivity
  • Opening
  • Radial flow
  • Water Table
 
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