نقشه‌برداری رقومی کربن آلی خاک (مطالعه موردی: مریوان، استان کردستان)

آب و خاک

مقاله 3، دوره 32، شماره 4 - شماره پیاپی 60، پاییز 1397، صفحه 737-750  

نوع مقاله: مقالات پژوهشی

شناسه دیجیتال (DOI): 10.22067/jsw.v32i4.68318

نویسندگان

شلیر اسکندری¹؛ کمال نبی اللهی ¹؛ روح الله تقی زاده مهرجردی²

¹دانشگاه کردستان

²دانشگاه اردکان

چکیده

کربن آلی خاک یکی از خصوصیات مهم خاک می‌باشد که اطلاعات پیرامون تغییرات مکانی آن جهت مدیریت زراعی، تخریب اراضی و مطالعات زیست محیطی حائز اهمیت می‌باشد. هدف از این پژوهش استفاده از روش شبکه عصبی مصنوعی برای تهیه نقشه کربن آلی خاک می‌باشد. بنابراین، تعداد 137 نمونه خاک از عمق 30-0 سانتی‌متری خاک‌های منطقه مریوان استان کردستان برداشت شده و خصوصیت کربن آلی خاک اندازه‌گیری شد. متغیرهای محیطی که در این پژوهش استفاده شد شامل اجزاء سرزمین و داده‌های تصویر +ETM ماهواره لندست می‌باشد. جهت ارتباط دادن بین کربن آلی خاک و متغیرهای کمکی، از مدل شبکه عصبی مصنوعی بهره گرفته شد. بر اساس نتایج انالیز حساسیت به روش رپر، برای پیش‌بینی کربن آلی خاک، متغییرهای کمکی شامل شاخص خیسی، شاخص همواری دره، فاکتور LS، شاخص NDVI و باند 3 مهم‌ترین بودند. نتایج این تحقیق نشان داد که مدل شبکه عصبی مصنوعی دارای 80/0، 01/0- و 67/0 به ترتیب برای ضریب تبیین، میانگین خطا و میانگین ریشه مربعات خطا می‌باشد. لذا پیشنهاد می‌شود که جهت تهیه نقشه رقومی خاک از مدل‌های شبکه عصبی مصنوعی در مطالعات آینده استفاده شود.

کلیدواژه‌ها

متغیرهای محیطی؛ تغییرات مکانی؛ نقشه ‌برداری رقومی

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