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تفکیک سهم نسبی پوشش های گوناگون زمین در تولید رسوب بستر در رودخانه ی واز با ویژگی‌های زمین‌شیمیایی | ||
| پژوهش های آبخیزداری | ||
| مقاله 7، دوره 35، شماره 4 - شماره پیاپی 137، دی 1401، صفحه 77-89 اصل مقاله (1.88 M) | ||
| نوع مقاله: پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/wmrj.2022.358248.1463 | ||
| نویسندگان | ||
| نبیه کریمی1؛ لیلا غلامی* 2؛ عطااله کاویان3؛ عبدالواحد خالدی درویشان4 | ||
| 1دانشجوی دکتری گروه مهندسی آبخیزداری، دانشکده ی منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران | ||
| 2دانشیار گروه مهندسی آبخیزداری، دانشکده ی منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران | ||
| 3استاد گروه مهندسی آبخیزداری، دانشکده ی منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران | ||
| 4دانشیار گروه مهندسی آبخیزداری، دانشکده ی منابع طبیعی، دانشگاه تربیت مدرس، نور، ایران | ||
| چکیده | ||
| شناسایی منبع های رسوب و آلاینده های متصل به آن و تفکیک سهم کاربری‌ها/پوشش‌های زمین در تولید رسوب ابزاری ارزشمند در اولویت‌بندی مکانی کنش‌های حفاطت خاک در حوزه‌های آبخیز است. این پژوهش با هدف منشأیابی رسوب بستر با روش زمین‌شیمیایی در آبخیز واز در استان مازندران انجام شد. سی نمونه‌ی خاک از پوشش های گوناگون زمین که سرچشمه‌ی رسوب بود، و یک نمونه‌ی رسوب بستر از خروجی حوزه برداشته، و 59 عنصر آن با روش ICP-OES اندازه گرفته‌شد. با ترکیب‌کردن آزمون‌های دامنه، کروسکال‌والیس، و تحلیل تابع تفکیک در بسته‌ی FingerPro در نرم‌افزار R، 15 عنصر K،Li ،P ،V ،Cr ،Fe ،Cu ،Ga ،Ge ،Rb ،Sb ،Ba ،Nd ،Ta و W برای ردیابی بهینه انتخاب شد. نتیجه با شاخص نکویی برازش 78/31 نشان داد که سهم زمین‌های کشاورزی، مرتع، جنگل و کناره های آب‌راه در تولید رسوب بستر به‌ترتیب %2/77، %3/61، %12/14 و %73/84 بود. نتیجه‌ی محاسبه‌ی سهم نسبی هر منبع در تولید رسوب نشان داد که کناره های آب‌راه و مرتع با سهم نسبی 0/43 و 0/0008 % به ازای هر هکتار به‌ترتیب بیش‌ترین و کم‌ترین است. | ||
| کلیدواژه‌ها | ||
| آبخیز واز؛ بسته‌ی FingerPro؛ ردیاب فرسایش؛ سرچشمه‌ی رسوب؛ منشأیابی رسوب | ||
| عنوان مقاله [English] | ||
| Separation of the Relative Contribution of Different Land Covers in Bed Sediment Yield in Vaz River Using Geochemical Characteristics | ||
| نویسندگان [English] | ||
| Nabiyeh Karimi1؛ Leila Gholami2؛ Ataollah Kavian3؛ Abdulvahed Khaledi Darvishan4 | ||
| 1Ph.D. Student, Department of Watershed Management Engineering, Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University, Sari, Iran | ||
| 2Associate Professor, Department of Watershed Management Engineering, Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University, Sari, Iran | ||
| 3Professor, Department of Watershed Management Engineering, Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University, Sari, Iran | ||
| 4Associate Professor, Department of Watershed Management Engineering, Faculty of Natural Resources, Tarbiat Modares University, Noor, Iran | ||
| چکیده [English] | ||
| Identification of sediment resources and their associated pollutants and contribution separation of land uses / land cover in sediment production is a valuable tool in spatial prioritization of soil conservation practices at watersheds. The present study was conducted with aim of bed sediment Fingerprinting using the geochemical method in Vaz watershed in Mazandaran Province. Thirty soil samples from different land covers were collected as sediment sources, and a sample of bed sediment at the basin outlet was measured. The geochemical characteristics including 59 elements were measured using ICP-OES. Then, using the combination of range tests, Kruskal-Valis and DFA test in FingerPro package at R software, 15 elements including K, Li, P, V, Cr, Fe, Cu, Ga, Ge, Rb, Sb, Ba, Nd, Ta, and W were selected as the optimal tracers. The results with a goodness index of fit of 78.31 showed that the contributions of agricultural, rangeland, forest, and stream bank lands in the bed sediment yield were with rates of 2.77, 3.61, 12.14, and 73.84 %, respectively. Finally, the relative contribution of each source in sediment yield for each hectare was calculated and the results showed that stream bank and rangeland with the relative contribution of 0.43 and 0.0008 percent for each hectare have the highest and lowest participation in sediment yield, respectively. | ||
| کلیدواژه‌ها [English] | ||
| Erosion tracer, FingerPro package, sediment fingerprinting, sediment sources, Vaz watershed | ||
| مراجع | ||
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