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http://dx.doi.org/10.5389/KSAE.2019.61.2.063

Influence of Rainfall observation Network on Daily Dam Inflow using Artificial Neural Networks  

Kim, Seokhyeon (Department of Rural Systems Engineering, Seoul national University)
Kim, Kyeung (Department of Rural Systems Engineering, Seoul national University)
Hwang, Soonho (Department of Rural Systems Engineering, Seoul national University)
Park, Jihoon (Climate Services and Research Department, APEC Climate Center)
Lee, Jaenam (Water Resources & Environment Research Group, Rural Research Institute, Korea Rural Community Corporation)
Kang, Moonseong (Department of Rural Systems Engineering, Institute of Agriculture and Life sciences, Institute of Green Bio Science and Technology, Seoul national University)
Publication Information
Journal of The Korean Society of Agricultural Engineers / v.61, no.2, 2019 , pp. 63-74 More about this Journal
Abstract
The objective of this study was to evaluate the influence of rainfall observation network on daily dam inflow using artificial neural networks(ANNs). Chungju Dam and Soyangriver Dam were selected for the study watershed. Rainfall and dam inflow data were collected as input data for construction of ANNs models. Five ANNs models, represented by Model 1 (In watershed, point rainfall), Model 2 (All in the Thiessen network, point rainfall), Model 3 (Out of watershed in the Thiessen network, point rainfall), Model 1-T (In watershed, area mean rainfall), Model 2-T (All in the Thiessen network, area mean rainfall), were adopted to evaluate the influence of rainfall observation network. As a result of the study, the models that used all station in the Thiessen network performed better than the models that used station only in the watershed or out of the watershed. The models that used point rainfall data performed better than the models that used area mean rainfall. Model 2 achieved the highest level of performance. The model performance for the ANNs model 2 in Chungju dam resulted in the $R^2$ value of 0.94, NSE of 0.94 $NSE_{ln}$ of 0.88 and PBIAS of -0.04 respectively. The model-2 predictions of Soyangriver Dam with the $R^2$ and NSE values greater than 0.94 were reasonably well agreed with the observations. The results of this study are expected to be used as a reference for rainfall data utilization in forecasting dam inflow using artificial neural networks.
Keywords
Artificial neural network; dam inflow; rainfall observation network;
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Times Cited By KSCI : 9  (Citation Analysis)
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