نشریه علمی پژوهشی مهندسی آبیاری و آب ایران

نشریه علمی پژوهشی مهندسی آبیاری و آب ایران

شبیه‌سازی مدیریت های مختلف آبشویی جهت اصلاح اراضی شور با استفاده از HYDRUS

نوع مقاله : مقاله پژوهشی

نویسندگان
1 گروه احیاء مناطق خشک و کوهستانی، دانشکده منابع طبیعی، دانشگاه تهران، کرج، ایران
2 استاد، گروه احیاء مناطق خشک و کوهستانی، دانشکده منابع طبیعی، دانشگاه تهران، ایران.
3 گروه مهندسی آبیاری و آبادانی، دانشکدگان کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران.
10.22125/iwe.2025.496003.1846
چکیده
بهسازی خاک‌های شور از دیدگاه حفاظت منابع آب و خاک اهمیت زیادی دارد، زیرا این خاک‌ها مانعی جدی برای تولید محصولات کشاورزی در مناطق خشک و نیمه‌خشک محسوب می‌شوند. شوری خاک موجب کاهش شدید عملکرد محصولات، آسیب به تجهیزات، تهدید امنیت غذایی و غیرقابل استفاده شدن خاک برای کشاورزی می‌شود. بسیاری از کشاورزان مناطق خشک توان مالی برای اصلاح خاک‌های شور ندارند. استفاده از پساب به‌عنوان منبع آبی در کشاورزی، ضمن تأمین بخشی از نیاز آبی این بخش، به صرفه‌جویی و پایداری منابع آبی کمک می‌کند. این پژوهش با هدف ارزیابی تأثیر آبشویی خاک‌های شور منطقه بوئین‌زهرا قزوین توسط زه‌آب انجام شد. نمونه‌های خاک از عمق 0 تا 30 سانتی‌متری با حداقل دست‌خوردگی در 6 ستون PVC جمع‌آوری شد. ستون‌ها به‌صورت یکی در میان دارای زهکش شنی و فاقد زهکش شنی طراحی شدند. همچنین، برای شبیه‌سازی حرکت آب و املاح در فرآیند آبشویی از مدل HYDRUS-1D استفاده شد. آبشویی در 6 سیلندر حاوی خاک شور با شرایط EC=64dS/m و PH=8 انجام شد. برای این منظور، سه نوع آب با کیفیت‌های مختلف شامل آب زهکش (PH=7.9, EC=57dS/m)، آب چاه (PH=7.1, EC=2.54dS/m) و مخلوط این دو آب (PH=7.6, EC=32 dS/m) استفاده شد. نتایج به بررسی کاهش شوری و هدایت الکتریکی خاک تحت تأثیر زهکش و کیفیت آب اختصاص یافت.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Simulation of different leaching managements for saline soil remediation using HYDRUS

نویسندگان English

Aramdokht Asadi 1
Gholamreza Zehtabian 2
Khaled Ahmadaali 3
Iman Hajirad 3
1 Department of Irrigation and Reclamation Engineering, College of Agricultural and Natural Resources, University of Tehran, Karaj, Iran
2 Professor. Faculty of Natural Resources, University of Tehran Karaj, Iran.
3 Department of Irrigation and Reclamation Engineering, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
چکیده English

Improving saline soils is crucial for water and soil resource conservation, as salinity significantly hampers agricultural production in arid and semi-arid regions. Saline soils reduce crop yields, damage farming equipment, threaten food security, and make the soil unsuitable for agriculture. Many farmers in these regions cannot afford the costs of rehabilitating saline soils. Wastewater utilization in agriculture can partially address water demand and contribute to conserving conventional water resources. This study investigates the effect of saline soil leaching using drainage water in Buin Zahra, Qazvin Province. Saline soil samples were collected from depths of 0 to 30 cm using pre-designed cylindrical samplers to minimize disturbance and placed into six polyvinyl chloride (PVC) columns. To evaluate drainage effects on reducing soil salinity and electrical conductivity (EC), alternating columns were equipped with sand drainage layers or left without drainage. The HYDRUS-1D model was used to simulate water and solute movement during the leaching process. The leaching experiment was conducted on six soil columns with initial conditions of EC = 64 dS/m and pH = 8, using three water types: drainage water (EC = 57 dS/m, pH = 7.9), well water (EC = 2.54 dS/m, pH = 7.1), and a mix of both (EC = 32 dS/m, pH = 7.6). Results demonstrated the role of drainage and water quality in reducing soil salinity and electrical conductivity, offering insights into cost-effective strategies for reclaiming saline soils.

کلیدواژه‌ها English

Saline soil
HYDRUS
Leaching
Physical model
drain water
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