پهنه بندی و شناسایی ویژگیهای محیطی موثر بر ذخیره کربن آلی خاک در حوضه زوجی گنبد

عطائیان, بهناز; بادرستانی, علی; خسروبیگی بزچلویی, سعید; ارتیمانی, محمد مهدی

doi:10.22059/jrwm.2024.362517.1716

نوع مقاله : مقاله پژوهشی

نویسندگان

¹ گروه مهندسی طبیعت، دانشکده منابع طبیعی و محیط زیست، دانشگاه ملایر، ملایر، ایران

² اداره کل منابع طبیعی و آبخیزداری استان مرکزی، اراک، ایران

³ اداره کل منابع طبیعی و آبخیزداری استان همدان، همدان، ایران

10.22059/jrwm.2024.362517.1716

چکیده

کربن آلی خاک به عنوان عامل کلیدی در پایداری و حاصل‌خیزی خاک به عنوان یکی از چالش‌های مهم محیط زیستی در مقوله تغییرات اقلیمی بشمار می‌آید. هدف از این تحقیق، پهنه‌بندی کربن آلی خاک در حوزه آبخیز زوجی گنبد استان همدان می‌باشد. در این تحقیق از اطلاعات مطالعه‌ هواشناسی، خاکشناسی و فرسایش و رسوب حوزه آبخیز معرف گنبد، شامل اطلاعات 49 خاکرخ در لایه 15-0 سانتی‌متری خاک استفاده شد. پس از جمع‌آوری اطلاعات ابتدا آزمون‌های نرمالیتی (آزمون شپیرو – ویلکα <0.05 )، همگنی واریانس و سپس ارتباط بین متغیرهای مستقل و کربن آلی با استفاده از همبستگی خطی پیرسون در نرم‌افزار SAS انجام شد. همچنین تعیین موثرترین متغییر مستقل با استفاده از تجزیه چند متغیره تجزیه و تحلیل عاملیPCA در نرم‌افزار XlStat 2.1 استفاده شد. به منظور تعیین پراکنش و مقدار کربن آلی خاک در حوزه آبخیز معرف گنبد از مدل‌سازی با استفاده از الگوریتم‌های یادگیری ماشین بردار پشتیبانSVM و جنگل تصادفی RF در نرم‌افزار R استفاده شد. نتایج نشان داد که 18/78 درصد از تغییرات کربن آلی خاک به چهار مؤلفه وابسته است. درصد رس و نیتروژن به عنوان تاثیرگذارترین متغیر‌ها، بر مقدار کربن آلی خاک انتخاب شدند، به ‌طوری‌که مؤلفه اول درصد رس 34 درصد و مؤلفه دوم نیتروژن 18 درصد تغییرات را در بردارند‌. با توجه به نتایج حاصل از اجرای مدل‌های ماشین پشتیبان بردار و جنگل تصادفی، مدل ماشین پشتیبان بردار با میزان ضریب کارایی 86/0 میزان خطای 05/0 در مرحله آزمون، مدل دقیق‌تری در این مطالعه می‌باشد.

کلیدواژه‌ها

عنوان مقاله [English]

Zoning and Identification of Environmental Characteristics Affecting Soil Organic Carbon Storage in Gonbad Paired-Watershed

نویسندگان [English]

Behnaz Attaeian ¹
Ali Badrestani ¹
Saeid Khosrobeigi Bozchelui ²
Mohammad Mehdi Artimani ³

¹ Department of Nature Engineering, Faculty of Natural Resources and Environment, Malayer University, Malayer, Iran

² General Department of Natural Resources of Markazi Province, Arak, Iran

³ General Department of Natural Resources of Hamedan Province, Hamedan, Iran.

چکیده [English]

Soil organic carbon as a key factor in soil stability and fertility is considered as one of the important environmental challenges in the context of climate change. The aim of this study was to determine soil organic carbon zonation in Gonbad paired-watershed, Hamedan province. In this research, the information of meteorology, soil science and erosion and sedimentation study of Gombad watershed was used, including the information of 49 profiles in the 0-15 cm soil layer. After collecting data, tests of normality (Shapiro-Wilkα test <0.05), homogeneity of variance, and then the relationship between independent variables and organic carbon were performed using Pearson's linear correlation in SAS software. Also, determining the most effective independent variable using multivariate analysis, PCA factor analysis was used in XlStat 2.1 software. In order to determine the distribution and amount of soil organic carbon in the Gonbad representative watershed, modeling using SVM support vector machine learning algorithms and RF random forest was used in R software.The results showed that 78.18% of soil organic carbon changes depend on four components. Clay and nitrogen percentage were selected as the most effective variables on soil organic carbon content, so that the first component of clay content explained 34% and the second component nitrogen explained 18% of variations. According to the results of the implementation of the SVM and RF Models, the SVM model with a CE factor of 0.86 and RMSE of 0.05 in the test stage is a more accurate model in this study.

کلیدواژه‌ها [English]

Ecology
Random Forest
Soil Organic Carbon
Vector Support Machine

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نشریه علمی - پژوهشی مرتع و آبخیزداری

پهنه بندی و شناسایی ویژگیهای محیطی موثر بر ذخیره کربن آلی خاک در حوضه زوجی گنبد

مراجع

مراجع

دوره 78، شماره 1
فروردین 1404
صفحه 1-16

پهنه بندی و شناسایی ویژگیهای محیطی موثر بر ذخیره کربن آلی خاک در حوضه زوجی گنبد

مراجع

مراجع

دوره 78، شماره 1فروردین 1404صفحه 1-16

دوره 78، شماره 1
فروردین 1404
صفحه 1-16