تهیه نقشه پتانسیل توسعه کارست در شمال شرقی استان خوزستان، ایران با استفاده از تکنیک های منطق فازی و فرآیند تحلیل سلسله مراتبی (AHP)

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشگاه شهید چمران اهواز دانشکده زمین شناسی

چکیده

هدف اصلی از این مطالعه تهیه نقشه های پتانسیل توسعه کارست در شمال شرقی استان خوزستان با استفاده از دو مدل منطق فازی و فرآیند تحلیل سلسله مراتبی (AHP)، به عنوان ابزاری مکمل در تحقیقات هیدرولوژیکی می باشد. سیستم اطلاعات جغرافیایی (GIS) و سنجش از دور (RS) به منظور ایجاد دو نقشه ای که توسعه کارست منطقه را به تصویر می کشند، استفاده شده است. این نقشه ها متشکل از پنج طبقه می باشند که پتانسیل توسعه کارست را از بسیار زیاد تا خیلی کم نشان می دهند. استخراج این نقشه ها بر اساس مطالعه داده های ورودی مانند لیتولوژی، تراکم خطواره، ارتفاع، شیب، بارش، دما، تراکم آبراهه و پوشش گیاهی صورت گرفته است. وزن های اختصاص یافته به تمام این عوامل با توجه به ارتباط آنها با پتانسیل توسعه کارست انجام گرفته است. در نهایت، دو نقشه بر اساس سیستم مدل سازی مکانی وزن دار ایجاد شد. نتایج صحت سنجی نشان داد که مدل منطق فازی نسبت به مدل AHP در مورد منطقه مورد مطالعه عملکرد بهتری دارد. بر اساس بررسی های هیدروژئولوژیکی، خصوصیات هیدرودینامیکی بدست آمده از تحلیل دبی خروجی چشمه های دره اناری، آبشکالو و سرحونی توسعه ضعیف تا خوب کارست منطقه را نشان می دهد. اطلاعات بدست آمده حاکی از آن است که یکی از مهمترین فاکتورهای توسعه کارست منطقه فعالیت های تکتونیکی و تشکیل خطواره ها در مقیاس های مختلف می باشد.

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