تحلیل فرا رتبه‌ای مراتع مستعد تخریب حوزۀ آبخیز نوشان استان آذربایجان غربی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 استادیار پژوهشی، بخش تحقیقات مرتع، موسسه تحقیقات جنگلها و مراتع کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران

2 دانش آموخته کارشناسی ارشدمرتع‌داری، دانشکده منابع طبیعی، دانشگاه ارومیه، ایران

3 دانشیار پژوهشی، بخش تحقیقات مرتع، موسسه تحقیقات جنگلها و مراتع کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران

چکیده

عملیات اصلاحی برای جلوگیری از تخریب مرتع زمانی کارآمد است که مناطق مستعد تخریب شناسایی و اقدامات اصلاحی در این مناطق متمرکز گردد. انجام پژوهش حاضر، برای شناسایی و شناخت وضعیت مناطق مستعد تخریب مراتع به کمک روش­های فرارتبه­ای به منظور مدیریت صحیح مراتع در حوزۀ آبخیز نوشان استان آذربایجان غربی انجام گرفت. برای اولویت بندی مراتع مستعد تخریب از تکنیک­ تصمیم­گیری چند معیارۀ فرارتبه­ای PROMETHEE II استفاده شد. در این تحقیق، برای تعیین مراتع مستعد تخریب از معیارهای متعددی شامل بارش، درصد شیب، فرسایش، رسوب، رواناب، دبی، تولید، وضعیت مرتع، تیپ گیاهی، گروه­های هیدرولوژیکی خاک، واحدهای اراضی، اسیدیتۀ خاک، هدایت الکتریکی خاک، کربن آلی، بافت خاک، کاربری اراضی، تراکم جمعیت و وجود روستا استفاده گردید. وزن­دهی معیارها به کمک روش آنتروپی شانون انجام گرفت. بالاترین وزن معیار مربوط به معیار تراکم جمعیت با وزن 1624/0 و کمترین وزن مربوط به معیار اسیدیتۀ خاک با وزن 0002/0 است. سپس با توجه به وزن و مقدار هر معیار برای هر تیپ گیاهی، داده­های مربوط به تیپ­های گیاهی با استفاده از تکنیک­ PROMETHEE II تحلیل شدند. کلاس تخریب­پذیری مرتع بر اساس تکنیک PROMETHEEII و بر اساس روش خوشه­بندی K-means در سه کلاس تخریب مرتع زیاد، متوسط و کم تعیین شد.

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