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http://dx.doi.org/10.3741/JKWRA.2003.36.2.195

Streamflow Estimation using Coupled Stochastic and Neural Networks Model in the Parallel Reservoir Groups  

Kim, Sung-Won (동양대학교 지구환경시스템공학과)
Publication Information
Journal of Korea Water Resources Association / v.36, no.2, 2003 , pp. 195-209 More about this Journal
Abstract
Spatial-Stochastic Neural Networks Model(SSNNM) is used to estimate long-term streamflow in the parallel reservoir groups. SSNNM employs two kinds of backpropagation algorithms, based on LMBP and BFGS-QNBP separately. SSNNM has three layers, input, hidden, and output layer, in the structure and network configuration consists of 8-8-2 nodes one by one. Nodes in input layer are composed of streamflow, precipitation, pan evaporation, and temperature with the monthly average values collected from Andong and Imha reservoir. But some temporal differences apparently exist in their time series. For the SSNNM training procedure, the training sets in input layer are generated by the PARMA(1,1) stochastic model and they covers insufficient time series. Generated data series are used to train SSNNM and the model parameters, optimal connection weights and biases, are estimated during training procedure. They are applied to evaluate model validation using observed data sets. In this study, the new approaches give outstanding results by the comparison of statistical analysis and hydrographs in the model validation. SSNNM will help to manage and control water distribution and give basic data to develop long-term coupled operation system in parallel reservoir groups of the Upper Nakdong River.
Keywords
Spatial-Stochastic Neural Networks Model; PARMA(1,1); LMBP; BFGS-QNBP; parallel reservoir groups; PARMA(1,1); LMBP; BFGS-QNBP;
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Times Cited By KSCI : 2  (Citation Analysis)
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