نوع مقاله : مقالات پژوهشی
نویسندگان
1 دانشگاه بیرجند، ایران
2 دانشیار، گروه علوم و مهندسی آب، دانشگاه بیرجند، بیرجند، ایران،
چکیده
چکیده
زمینه و هدف: ﺑﯿﺶ از 85 درﺻﺪ ﻓﺎﺿﻼب ﺷﻬﺮی و ﺑﺨﺶ اﻋﻈﻢ فاضلاب‌های ﺻﻨﻌﺘﯽ را آب ﺗﺸﮑﯿﻞ داده، از این رو ﻓﺎﺿﻼب تصفیه‌شده می‌تواند در ﻫﺮ ﺑﺨﺶ از فعالیت‌ها ﮐﻪ ﻧﯿﺎزﻣﻨﺪ آب ﺑﺎﺷﺪ، ﺑﻪﮐﺎر ﮔﺮﻓﺘﻪ ﺷﻮد. مطالعه حاضر با هدف ارائه راهکار عملی جهت تجدید سفرههای آب زیرزمینی از لحاظ کمی و کیفی در ﻣﻨﺎﻃﻘﯽ ﮐﻪ ﺷﺮاﯾﻂ ﺧﺎک و سفرههای آب زﯾﺮزﻣﯿﻨﯽ ﺑﺮای ﺗﻐﺬﯾﻪ ﻣﺼﻨﻮﻋﯽ ﻣﻨﺎﺳﺐ ﺑﺎﺷﺪ، ﺑﺎ وارد کردن ﻓﺎﺿﻼب تصفیه‌شده به سفرههای آب زیرزمینی که کیفیت کمتری نسبت به پساب تصفیه شده دارند، انجام گرفت.
مواد و روشها: در این مطالعه به منظور تغذیه مصنوعی، معیارهای کیفیت شیمیایی، هدایت هیدرولیکی، ضخامت لایه غیراشباع خاک، توپوگرافی و کاربری اراضی در سیستم اطلاعات جغرافیایی مورد بررسی قرار گرفت و مناطق عمومی مستعد تغذیه مصنوعی با هدف تغذیهای (افزایش کمی) در اراضی آبخوان دشت بیرجند مشخص گردید. همچنین معیارها با هدف افزایش بهبود کیفیت شیمیایی (افزایش کمی و کیفی) نیز با استفاده از روش ای ان پی و نرم‌افزار سوپر دسیژن وزندهی گردید؛ بهطوری‌که کیفیت شیمیایی موجود آبخوان در اولویت تغذیه مصنوعی قرار گرفت.
یافتهها: بر اساس هدف تغذیه ای، 6/63 کیلومترمربع از اراضی در دستهبندی خیلی خوب و 50/56 کیلومترمربع در دستهبندی خوب منطقه قرار گرفتند. همچنین بر اساس هدف بهبود کیفیت شیمیایی، 1/13 کیلومترمربع از اراضی در دسته بندی خیلی خوب و 55/61 کیلومترمربع در دستهبندی خوب قرار گرفتند. در این هدف، پساب تصفیه شده در مناطقی از آبخوان که کیفیت نامناسبی دارد، تزریق میشود تا سبب بهبود کیفیت آن گردد.
نتیجهگیری: در این پژوهش با استفاده از مکانیابی مناطق مستعد تغذیه مصنوعی، راهکاری ارائه شد که ضمن تغذیه مناطقی از آبخوان که کیفیت نامناسبی دارد، کیفیت آن را نیز افزایش میدهد. این امر سبب میگردد آب آبخوان برای مصارف کشاورزی، مناسب و کارا گردد. این راهکار منابع با کیفیت بالاتر را برای مصارف شرب و بهداشتی حفظ نماید.
کلیدواژه‌ها
عنوان مقاله [English]
Placement of nutrient wells for artificial nutrition and improvement of aquifer quality in Birjand plain using wastewater treated wastewater
نویسندگان [English]
- Mojtaba Hasanpour 1
- Hossein Khozeymehnezhad 2
1 Birjand University, Iran
2 Associate professor, Department of Water Engineering, Faculty of Agriculture, University of Birjand, Birjand, Iran.
چکیده [English]
Background and purpose: More than 85 percent of urban sewage and a large proportion of industrial wastewater are water, so refined sewage can be used in any part of the activities that require water. The aim of this study was to provide a practical solution for quantitative and qualitative groundwater aquifer regeneration in areas where soil and groundwater conditions are suitable for artificial nutrition by introducing refined sewage to groundwater aquifers with a lower quality.
Materials and Methods: In this study, the chemical quality criteria for artificial feeding of aquifer including hydraulic conductivity, thickness unsaturated soil, topography and land use in geographic information systems were studied to determine the appropriate public areas for artificial feeding in land aquifer Birjand. Also, the criteria for increasing the improvement of chemical quality (quantitative and qualitative increase) were also weighed using the (Analytic Network Process) ANP method and Super Decisions software, so that the chemical quality of the aquifer was ranked as the first priority of the artificial nutrition.
Results:Based on the nutritional goal, 6.63 square kilometers of land were classified in very good and 50.66 square kilometers in good regional classifications. Based on the objective of improving the chemical quality , 1.13 square kilometers of lands were classified into a very good category and 55.61 square kilometers in good classification. For this purpose, the treated wastewater is injected into areas of an aquifer that has poor quality, to improve its quality.
Conclusion: In this research, using the location of susceptible artificial feeding areas, a solution was proposed that, while feeding areas of an aquifer that has poor quality, also increases its quality. This will make aquifer water suitable for agricultural use. This solution preserves higher quality resources for drinking and sanitary purposes.
کلیدواژه‌ها [English]
- Prioritization
- Quality Improvement
- Nutrition Wells
- Criteria
- ANP
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