نشریه علمی - پژوهشی مرتع و آبخیزداری

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناسی ارشد عمران-آب، باشگاه پژوهشگران جوان و نخبگان، واحد مراغه، دانشگاه آزاد اسلامی، مراغه، ایران.

2 استادیار، مهندسی منابع آب، گروه مهندسی آب، دانشکده کشاورزی، دانشگاه تبریز، ایران.

چکیده

برآورد بار رسوبی معلق رودخانه‌ها با توجه به خسارات ناشی از عدم توجه و لحاظ کردن آن، یکی از مهم‌ترین و اساسی‌ترین چالش‌های مطالعات انتقال رسوب و مهندسی رودخانه می‌باشد. با توجه به اهمیت و نقش رسوب در طراحی و نگهداری سازه‌های هیدرولیکی همچون سدها و همچنین برنامه‌ریزی جهت استفاده بهینه از منابع آبی در پایین‌دست رودخانه‌ها و حفظ منابع مغذی بالادست آن­ها، همواره تلاش‌های بسیاری در زمینه تخمین میزان بار رسوبی معلق رودخانه‌ها انجام گرفته و روش‌های متعددی در این زمینه توسعه یافته است. اما با توجه به هزینه‌بر بودن اکثر روش‌ها و یا عدم دقت کافی در اکثر روش‌های تجربی مرسوم، نیاز به روش نوینی که بتواند بار رسوبی معلق رودخانه را با بیشترین دقت ممکن تخمین زند، امری ضروری به نظر می‌رسد. در این مطالعه میزان بار رسوبی معلق رودخانه لیقوان چای توسط روش‌های رگرسیون بردار پشتیبان و k-نزدیک‌ترین همسایگی برآورد گردیدند. نتایج نشان‌دهندۀ عملکرد مناسب هر دو روش داده‌کاوی بررسی شده در این تحقیق می‌باشد. از میان روش‌های بررسی شده در این تحقیق، روش رگرسیون بردار پشتیبان میزان بار رسوبی معلق رودخانه لیقوان چای را با ارائه مقادیر ضریب همبستگی برابر با 959/0 و ریشه میانگین مربعات خطا برابر با 547/43 (تن در روز) با دقت بیشتری نسبت به روش k-نزدیک‌ترین همسایگی پیش‌بینی کرد.

کلیدواژه‌ها

عنوان مقاله [English]

Comparison of the Efficiency of Support Vector Regression and K-Nearest Neighbor Methods in suspended sediment load Estimation in river (Case Study: Lighvan Chay River)

نویسندگان [English]

  • ali rezazadeh joudi 1
  • Mohammad Taghi Sattari 2

1 Msc. islamic azad university of Maragheh Branch

چکیده [English]

Estimation of suspended sediment load or specifying the damages incured as a result of inattention to such estimation is one of the most important and fundamental challenges in river engineering and sediment transport studies. Given the importance and role of sediment in the design and maintenance of hydraulic structures such as dams, as well its significance in planning for efficient tilization of downstream river and also conservation of nutrients at the upstream of river, many attempts have been made to estimate suspended sediment load of rivers and numerical methods have been developed in this regard. But due to the high cost of most procedures or lack of adequate precision in most common experimental methods, a new method is needed that can estimate suspended sediment load with the greatest possible precision. In this study, the amount of suspended sediment load of Lighvan River has been estimated through support vector regression and k-Nearest neighbor methods. Results indicated the appropriateness of both data mining techniques applied in this study. Among examined methods in this study, the support vector regression method predicted the amount of suspended sediment load in LighvanChay River with representing evaluation indexes such as (CC=0.959, RMSE=43.547(ton/day)) more accurately than K-nearest neighbor method

کلیدواژه‌ها [English]

  • k-nearest neighbors
  • LighvanChayriver
  • Data Mining
  • Support Vector Regression
  • Suspended sediment load
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