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KMID : 1024520020110030201
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Journal of the Environmental Sciences
2002 Volume.11 No. 3 p.201 ~ p.207
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Water Quality Forecasting of Chungju Lake Using Artificial Neural Network Algorithm
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Jeong Hyo-June
Lee So-Jin
Lee Hong-Keun
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Abstract
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This study was carried out to evaluate the artificial neural network algorithm for water quality forecasting in Chungju lake, north Chungcheong province. Multi-layer perceptron(MLP) was used to train artificial neural networks. MLP was composed of one input layer, two hidden layers and one output layer. Transfer functions of the hidden layer were sigmoid and linear function. The number of node in the hidden layer was decided by trial and error method. It showed that appropriate node number in the hidden layer is 10 for pH training, 15 for DO and BOD, respectively. Reliability index was used to verify for the forecasting power. Considering some outlying data, artificial neural network fitted well between actual water quality data and computed data by artificial neural networks.
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KEYWORD
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artificial neural networks, back-propagation, transfer function, water quality forecasting
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