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تحلیل منطقهیی برآورد بار معلق سالانه با به کارگرفتن ویژگی‌های آبخیز در استان هرمزگان | ||
| پژوهش های آبخیزداری | ||
| مقاله 6، دوره 32، شماره 4 - شماره پیاپی 125، دی 1398، صفحه 66-78 اصل مقاله (982.57 K) | ||
| نوع مقاله: پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/wmej.2019.126052.1212 | ||
| نویسندگان | ||
| مصطفی جعفری عاشور آبادی* 1؛ عبدالرحیم جمال2 | ||
| 1گروه مهندسی آب، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران | ||
| 2دکتری مهندسی عمران- آب | ||
| چکیده | ||
| این پژوهش با هدف دست‌یابی به مدلهای منطقهیی برآورد بار معلق سالانه در استان هرمزگان انجام شد. متغیر وابسته میانگین بار معلق سالانه‌ی زیرحوزهها، و متغیرهای مستقل 21 سنجه‌ی ریخت‌شناختی و اقلیمی زیرحوزهها با دوره‌ی مشترک داده‌برداری 21 سال (1390-1370) انتخاب شد، و در دو مرحله‌ی تعیین عرصههای همگن و استنتاج مدل منطقهیی برای منطقه‌های همگن تحلیل شد. پس از شناختن تاثیرگذارترین سنجه‌ها به‌روش تحلیل عاملی، بهترین روش خوشهبندی منطقهیی بر اساس سه حالت سنجه‌های موثر، میزان بار معلق سالانه، و مشترک (اجتماع دو حالت) با تعداد خوشههای متفاوت دانسته شد. معادله‌های وایازی (رگرسیونی) بین اندازه‌های بار معلق سالانه با متغیرها به روش گام‌به‌گام به‌دست آمد. دادههای وایازی برای ارزیابی‌کردن مدل وایازی به‌دست‌آمده به‌کاررفت و مقدار معیار نش-ساتکلیف این معادله‌ها محاسبه شد. با توجه به نتیجه‌های خوشهبندی میتوان گفت که دادههای بار معلق از دو مدل منطقهیی تبعیت میکند. برای برآوردکردن بار معلق این دو منطقه معادلههایی با ضریب تبیین 0/78 و 0/84 داده شد. پیشنهاد میشود این تحقیق در حوزه‌های بیش‌تر و در شرایط مختلف جغرافیایی انجام شود تا بتوان این رابطه‌ها را برای حوزه‌های بی‌آمار بیش‌تری بهکاربرد. | ||
| کلیدواژه‌ها | ||
| تخمین آورد بار معلق رودخانهیی؛ آبخیز؛ خوشه بندی؛ مجموعه‌ی زمانی؛ وایازی چندمتغیره | ||
| عنوان مقاله [English] | ||
| Regional Suspended Load Analysis Using the Watershed Characteristics in the Province of Hormozgan | ||
| نویسندگان [English] | ||
| Mostafa Jafari Ashourabadi1؛ Abdolrahim Jamal2 | ||
| 1M.Sc. Student, of Water Engineering, Sari Agricultural Sciences and Natural Resources University, Iran | ||
| 2Ph.D., of Water Engineering | ||
| چکیده [English] | ||
| The present study is aimed at estimating the suspended load discharged from watersheds in the Province of Hormozgan. The mean annual suspended loads were considered as the dependent variable and 21 parameters of morphological and climatic factors were selected as the independent parameters. The data were collected from 19 hydrometry stations for a 21-years period (1991–2011). This analysis is presented in two steps; a principal component analysis (PCA) was further applied to extract the underlying factors (principal component) and use the hierarchical clustering analysis in order to identify homogeneous groups. Multi regression was performed to identify the contribution of each variable. Different clustering scenarios were considered for selecting the optimal number of homogeneity groups, and their overall impacts on cluster validation indices were assessed. These three scenarios include dependent variable, independent parameters and the combined variables. The performance of the models was evaluated using the coefficient of determination (R2) and the Nash-Sutcliffe model efficiency. The watersheds were divided into two clusters and multiple regression models were derived for each homogenous region. Eventually, the models with coefficients of determination of 0.78 and 0.84 were used to estimate the mean annual suspended load. It is recommended to study more watersheds with different condition to reach the plurality and improve the quality of these models for estimation of the suspended load in the ungauged watersheds. | ||
| کلیدواژه‌ها [English] | ||
| Estimation of suspended load, time series, drainage basin, clustering, multiple regression | ||
| مراجع | ||
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