Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/1197
Title: A new indirect multi-step-ahead prediction model for a long-term hydrologic prediction
Authors: Cheng, Chuntian
Xie, Jing-xin
Chau, Kwok-wing
Layeghifard, Mehdi
Subjects: Time-delay neural network
Adaptive time-delay neural network
Indirect multi-step-ahead prediction
Spline interpolation
Issue Date: 30-Oct-2008
Publisher: Elsevier
Source: Journal of hydrology, 2008, v. 361, no. 1-2, p. 118-130.
Abstract: A dependable long-term hydrologic prediction is essential to planning, designing and management activities of water resources. A three-stage indirect multi-step-ahead prediction model, which combines dynamic spline interpolation into multilayer adaptive time-delay neural network (ATNN), is proposed in this study for the long term hydrologic prediction. In the first two stages, a group of spline interpolation and dynamic extraction units are utilized to amplify the effect of observations in order to decrease the errors accumulation and propagation caused by the previous prediction. In the last step, variable time delays and weights are dynamically regulated by ATNN and the output of ATNN can be obtained as a multi-step-ahead prediction. We use two examples to illustrate the effectiveness of the proposed model. One example is the sunspots time series that is a well-known nonlinear and non-Gaussian benchmark time series and is often used to evaluate the effectiveness of nonlinear models. Another example is a case study of a long-term hydrologic prediction which uses the monthly discharges data from the Manwan Hydropower Plant in Yunnan Province of China. Application results show that the proposed method is feasible and effective.
Rights: Journal of Hydrology © 2008 Elsevier B.V. The journal web site is located at http://www.sciencedirect.com.
Type: Journal/Magazine Article
URI: http://hdl.handle.net/10397/1197
DOI: 10.1016/j.jhydrol.2008.07.040
ISSN: 0022-1694
Appears in Collections:CEE Journal/Magazine Articles

Files in This Item:
File Description SizeFormat 
JH6.pdfPre-published version542.75 kBAdobe PDFView/Open


All items in the PolyU Institutional Repository are protected by copyright, with all rights reserved, unless otherwise indicated. No item in the PolyU IR may be reproduced for commercial or resale purposes.