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Adaptive neuro-fuzzy inference technique for estimation of light penetration in reservoirs
Authors:Selçuk Soyupak  Feza Karaer  Engin Şentürk  Hűseyin Hekim
Affiliation:1.Faculty of Engineering, Department of Civil Engineering,Atilim University,Kizilca?ar K?yü, ?ncek, Ankara,Turkey;2.Faculty of Engineering and Architecture, Department of Environmental Engineering,Uluda? University,Bursa,Turkey;3.State Hydraulic Works of Turkey, 1st Division,Bursa,Turkey
Abstract:An adaptive neuro-fuzzy inference technique has been adopted to estimate light levels in a reservoir. The data were collected randomly from Doğanci Dam Reservoir over a number of years. The input data set is a matrix with vectors of time, depth, sampling location, and incident solar radiation. The output data set is a vector representing light measured at various depths. Randomization and logarithmic transformations have been applied as preprocessing. One-half of the data have been utilized for training; testing and validation steps utilized one-fourth each. An adaptive neuro-fuzzy inference system (ANFIS) has been built as a prediction model for light penetration. Very high correlation values between predictions and real values on light measurements with relatively low root mean square error values have been obtained for training, test, and validation data sets. Elimination of the overtraining problem was ensured by satisfying close root mean square error values for all sets.
Keywords:Reservoirs  Modeling  Light penetration  Neuro-fuzzy inference  ANFIS
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