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ارزیابی فراسنجه‌های هیدرولیکی آبخوان دشت ملکان با استفاده از مقاومت الکتریکی | ||
| پژوهش های آبخیزداری | ||
| مقاله 6، دوره 32، شماره 1 - شماره پیاپی 122، فروردین 1398، صفحه 42-59 اصل مقاله (1.66 M) | ||
| نوع مقاله: پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/wmej.2018.123884.1167 | ||
| نویسندگان | ||
| فرحناز عزیزی* 1؛ اصغر اصغری مقدم2؛ امیررحسین ناظمی3 | ||
| 1دکترای هیدروژئولوژی، دانشکده علوم طبیعی، دانشگاه تبریز، تبریز، ایران | ||
| 2استاد هیدروژئولوژی، دانشکده علوم طبیعی، دانشگاه تبریز، تبریز، ایران | ||
| 3استاد هیدروژئولوژی، دانشکده کشاورزی، دانشگاه تبریز، تبریز، ایران | ||
| چکیده | ||
| شناخت آبخوان و تعیین فراسنجه‌های هیدرولیکی آن برای ارزیابی و مدیریت منابع آب‌های زیرزمینی ضروری است. در این پژوهش به بررسی زمین‌آب‌شناسی و برآورد فراسنجه‌های هیدرولیکی آبخوان دشت ملکان در استان آذربایجانشرقی با استفاده از دادههای مقاومت ویژه پرداخته شده است. برای یافتن توزیع مقاومت الکتریکی زیرسطحی واقعیتر، مقاومت الکتریکی وارون با استفاده از برنامههای وارونسازی مقاومت ویژه مدلسازی شد. مقاومت حقیقی و ضخامت لایههای زیرسطحی با تعیین ساختار منحنیهای ژرفاپیمایی مقاومت و تعیین منحنیهای الکتریکی منطبق با دادههای صحرایی تعیین شد. ضخامت متوسط آبرفت 75 متر، و مقدار متوسط آب‌دهی ویژه و تخلخل آبخوان بهترتیب 0/042 و 0/32 برآورد شد. مقاومت عرضی در هر ژرفایابی محاسبه شد و نتایج همبستگی فراسنجه‌های مقاومت عرضی آبخوان، و توان انتقال بهدستآمده از آزمون آب‌کشی، انطباقی پذیرفتنی بین این فراسنجه‌ها نشان داد. مقایسهی نتایج روش زمین‌فیزیکی و نتایج آزمون آب‌کشی نشان داد که ارزیابی فراسنجه‌های هیدرولیکی با مقطع‌نگاری پرتوی مقاومت ویژه‌ی الکتریکی پذیرفتنی است، بهطوریکه می‌توان با تلفیق دادههای بهدستآمده از زمین‌فیزیک، آزمون آب‌کشی و پژوهش‌های زمینشناسی، نتایجی دلخواه را برای ارزیابی و مدیریت بهینهی منابع آب زیرزمینی به‌دست آورد. | ||
| کلیدواژه‌ها | ||
| آب‌دهی ویژه؛ آزمون آب‌کشی؛ تخلخل؛ مقاومت الکتریکی | ||
| عنوان مقاله [English] | ||
| Evaluation of Malekan Plain Aquifer Hydraulic Parameters Using Electrical Resistivity | ||
| نویسندگان [English] | ||
| Farahnaz Azizi1؛ Asghar Asghari Moghaddam2؛ Amirhossein Nazemi3 | ||
| 1Ph.D. of Hydrogeology, Department of Earth Sciences, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran | ||
| 2Professors of Hydrogeology, Department of Earth Sciences, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran | ||
| 3Professors of Hydrogeology, Department of Irrigation & Drainage, Faculty of Agriculture, University of Tabriz, Tabriz, Iran | ||
| چکیده [English] | ||
| Estimating aquifer hydraulic parameters is essential for the assessment and management of groundwater resources. In this paper, the hydraulic parameters of Malekan Plain Aquifer were estimated using the resistivity data. The inverse electrical resistivity model to provide the best distribution of subsurface electrical resistance, using the inverse resistivity programs has been carried out. The relative thickness of subsurface layers using the characterization of electrical resistance curves was determined. The average thicknesse of, the alluvial aquifer and its porosity (ϕ) and specific yield (Sy) were estimated at 75 meters, 0.32 and 0.042, respectively. Results indicate a strong correlation between aquifer transmissivity and the transverse presence of resistance. The estimated values from both geoelectrical and pumping test methods indicate that the results of electrical resistivity tomography method are acceptable. Therefore, using suitable results may be obtained a combination of pumping test, geological studies and geophysical methods. The aquifer parameters obtained from the resistivity sounding and pumping test data may be used for an optimal management and assessment of groundwater resources. | ||
| کلیدواژه‌ها [English] | ||
| Electrical resistivity, porosity, pumping test, specific yield | ||
| مراجع | ||
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