TAILIEUCHUNG - Determining suitable probability distribution models for flow and precipitation series of the Seyhan river basin

The frequency analysis of the largest, or the smallest, of a sequence of hydrologic events has long been an essential part of the design of hydraulic structures. Therefore, the question of better fit among countless probability models used in frequency analysis is always a fresh one. | Turk J Agric For 26 (2002) 187-194 © TÜB‹TAK Determining Suitable Probability Distribution Models For Flow and Precipitation Series of the Seyhan River Basin Fatih TOPALO⁄LU University of Çukurova, Faculty of Agriculture, Agricultural Structures and Irrigation Dept., 01330 Yüre¤ir, Adana - TURKEY Received: Abstract: The frequency analysis of the largest, or the smallest, of a sequence of hydrologic events has long been an essential part of the design of hydraulic structures. Therefore, the question of better fit among countless probability models used in frequency analysis is always a fresh one. The purpose of this study was to make a statistical comparison of currently popular probability models. Therefore, Gumbel, log-Logistic, Pearson-3, log-Pearson-3 and log-Normal-3 distributions were applied to the series of annual instantaneous flood peaks and annual peak daily precipitation for 13 flow gauging and 55 precipitation gauging stations in the Seyhan basin, respectively. The parameters of the distributions were estimated by the methods of moments (MOM) and probability weighted moments (PWM). A detailed chi-squared and Kolmogorov-Smirnov (K-S) goodness-of-fit tests were also applied. According to the evaluations of chi-squared tests, Gumbel (MOM) for both flow and precipitation stations in the Seyhan river basin were found to be the best models. As a result of the K-S test, log-Normal-3 (MOM) and log-Pearson-3 (MOM) models were determined to be the best for flow and precipitation stations, respectively. Key Words: Frequency Analysis, Goodness-of-Fit Tests, Flow and Precipitation Series Seyhan Havzas› Ak›m ve Ya¤›fl Verileri ‹çin Uygun Olas›l›k Da¤›l›m Modellerinin Belirlenmesi Özet: Hidrolojik olaylar dizininin en büyük veya en küçü¤ünün frekans analizi uzun zamand›r hidrolik yap›lar›n projelendirilmesinin önemli bir k›sm›n› oluflturmaktad›r. Bu yüzden, frekans analizinde kullan›lan say›s›z olas›l›k modelleri aras›nda en iyi uyum sorusu daima .

• Nông nghiệp
• Frequency Analysis
• Goodness of Fit Tests
• Flow and Precipitation Series
• Probability weighted moments
• Methods of moments
• Tạp chí Phát triển Khoa học và Công nghệ
• Measurement based electrical parameters of power transformers
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• Cracked rotor shaft
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• Lecture ELEC2400 signals and systems
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• Frequency domain analysis
• Fourier transform
• Frequency response of LTI systems
• Annual maximum rainfall
• Probability distribution functions
• Annual maximum rainfall for Mulde
• Distribution models
• Probability distribution models
• Rainfall data
• Frequency analysis of rainfall data
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• Failure diagnosis
• Power transformer
• Frequency Response Analysis
• Lumped equivalent circuit
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• Fractional Frequency Reuse
• LongTerm Evolution
• Coverage probability
• Stochastic geometry
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• Low frequency variants
• Underlying models