ارزیابی عملکرد رهیافت‌های برنامه‌ریزی ژنتیک و ماشین بردار پشتیبان در بازسازی داده‌های گمشده بارش

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری مهندسی منابع آب، گروه مهندسی آب، دانشکده کشاورزی، دانشگاه شهرکرد

2 استادیار گروه مهندسی آب، دانشکده کشاورزی، دانشگاه شهرکرد

3 استادیار گروه مهندسی آب، دانشکده کشاورزی، دانشگاه بوعلی سینا همدان

4 دانشجوی کارشناسی ارشد مهندسی منابع آب، گروه مهندسی آب، دانشکده کشاورزی، دانشگاه تبریز

چکیده

فقدان یا گسست در سری زمانی داده‌های بارش در بسیاری از ایستگاه‌های هواشناسی، یکی از محدودیت‌های اصلی در مطالعات اقلیم‌شناسی و منابع آب است. در پژوهش حاضر از دو رهیافت هوشمند برنامه‌ریزی ژنتیک و ماشین بردار پشتیبان به منظور بازسازی داده‌های بارش ماهانه چهار ایستگاه باران‌سنجی واقع در استان همدان، در دوره آماری 1370 تا 1389 استفاده شد. خلاء آماری ابتدا به کمک اطلاعات یک ایستگاه، سپس دو ایستگاه و در نهایت داده‌های سه ایستگاه، بازسازی گردید. نتایج نشان داد که با افزایش حافظه و تعداد ایستگاه‌های دخیل در مرحله آموزش، عملکرد مدل‌ها بهبود می‌یابد. همچنین رهیافت ماشین بردار پشتیبان در بازسازی داده‌های بارش ماهانه ایستگاه سرابی و مریانج به ترتیب با ریشه میانگین مربعات خطا 9/12 و 4/11 میلی‌متر و ضریب همبستگی 93/0 و 95/0 نسبت به روش برنامه‌ریزی ژنتیک با ریشه میانگین مربعات خطای 13 و 2/12 میلی‌متر و ضریب همبستگی 93/0 و 95/0 از عملکرد بهتری برخوردار بوده است.

کلیدواژه‌ها

عنوان مقاله [English]

Performance evaluation of the genetic programming and support vector machine models in reconstruction of missing precipitation data

نویسندگان [English]

  • M. Kadkhodahosseini 1
  • R. Mirabbasi-Najafabadi 2
  • H. Nozari 3
  • A. Rostami 4
1 Ph. D. Student of Water Resources Engineering, Department of Water Engineering, College of Agriculture, Shahrekord University, Shahrekord, Iran
2 Assistant Professor, Department of Water Engineering, College of Agriculture, Shahrekord University, Shahrekord, Iran
3 Assistant Professor, Department of Water Engineering, College of Agriculture, Buali Sina University, Hamedan, Iran
4 M. Sc. Student of Water Resources Engineering, Department of Water Engineering, College of Agriculture, Tabriz University, Tabriz, Iran
چکیده [English]

Incomplete rainfall datasets with missing gaps is a major challenge in climatology and water resource studies. In the present study, two intelligent models, namely Genetic Programing (GP) and Support Vector Machines (SVM) were used to reconstruct the monthly rainfall data of four rain-gauges located in Hamedan province, Iran during the period of 1992 to 2011. The incomplete rainfall data was reconstructed first by using the data of one, two and three stations respectively. The results showed that increasing the memory and the number of stations involved in the training phase, will improve the performance of the models. In reconstruction of monthly precipitation data of Sarabi and Maryanj stations, the Support Vector Machine method showed better performance with RMSE of 12.9 mm and 11.4 mm, and correlation coefficients (r) of 0.93 and 0.95, respectively. The corresponding values of RMSE for GP approach were 13 mm and 12.21 mm, which indicated the superior performance of SVM.

کلیدواژه‌ها [English]

  • Rainfall
  • Missing data
  • intelligent methods
  • Hamedan

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هواشناسی کشاورزی
دوره 6، شماره 1 - شماره پیاپی 11
جلد 6، شماره 1، بهار و تابستان 1397
شهریور 1397
صفحه 41-49

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