ارزیابی نهشته‌های کواترنر جهت مکان‌یابی مناطق مستعد پخش سیلاب در دشت شبستر

نویسندگان

1 استادیار گروه زمین شناسی، دانشکده علوم پایه، دانشگاه محقق اردبیلی

2 دانش آموخته دوره کارشناس ارشد آبخیزداری، دانشکده فناوری کشاورزی و منابع طبیعی، دانشگاه محقق اردبیلی

چکیده

پخش سیلاب در مناطق نفوذپذیر یک استراتژی مناسب برای مهار سیلاب و بهره­وری از آن است. تعیین مکان مناسب برای پخش سیلاب، خود یکی از مهم­ترین مراحل انجام این گونه پروژه­ها می­باشد. در این مقاله مناطق مستعد پخش سیلاب در دشت شبستر بر اساس  چهار عامل شیب، نفوذپذیری، ضریب قابلیت انتقال و ضخامت آبرفت خشک (غیراشباع) مکانیابی شد. بدین منظور، با استفاده از داده­های لاگ­های حفاری و اطلاعات چاه­های پیزومتری، اکتشافی و بهره­برداری موجود در منطقه، لایه­های اطلاعاتی پارامترها در سیستم اطلاعات جغرافیایی (نرم­افزار 10Arc GIS) تهیه و سپس این نقشه­ها با هم تلفیق شد. بر اساس نتایج بدست آمده مشاهده می­شود که بیشترین مساحت از کل محدوده­ آبخوان برابر با 794/192 کیلومتر­مربع (153/40 درصد)، دارای استعداد پخش سیلاب مناسب و کمترین وسعت معادل 046/61 کیلومتر مربع (714/12 درصد) از مساحت آبخوان در محدوده­ خیلی مناسب قرار می­گیرد.
 
 
 

کلیدواژه‌ها


عنوان مقاله [English]

Evaluation of Quaternary Deposits to Determine Suitable Areas for Water Spreading in Shabestar Plain

نویسندگان [English]

  • GH Ahmadzadeh1 1
  • FA jafari 2
1 Assistant Professor, Department of Geology, Faculty of Basic Science, University of Mohaghegh Ardabili, Iran
2 Former M.Sc. of Watershed Management, Faculty of Agricultural Technology and Natural Resources, University of Mohaghegh Ardabili, Iran
چکیده [English]

Water spreading on the permeable areas is an appropriate strategy for flood control and efficiency. Determination of appropriate site for water spreading is one of the most important stages of such projects. In this paper, suitable areas for water spreading in Shabestar plain were determined based on four parameters including slope, permeability, transmissivity and unsaturated alluvium thickness. For this purpose, by using data of drilling logs from exploration and piezometric wells in the area, layer parameters information was prepared in geographical information system (Arc GIS 10 software) and then maps were combined together. The results showed that the maximum area of the aquifer with 192.794 square kilometers (40.1 percent), had suitable condition for water spreading and 146.512 square kilometers (30.5 %) of ​​the aquifer, had moderate condition. As well as 79.786 square kilometers (16.6 percent), had unsuitable condition for water spreading and 61.046 square kilometers (12.7%) of the aquifer had quite suitable condition.

کلیدواژه‌ها [English]

  • Aquifer
  • Geographical information system
  • Piezometric wells
  • Transmisivity
  • Water spreading
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