Affiliation:
1. School of Water Conservancy Engineering, Zhengzhou University, Zhengzhou 450001, China
2. Zhengzhou Key Laboratory of Water Resource and Environment, Zhengzhou 450001, China
Abstract
Abstract
Aiming at revealing the co-integration under structural change in the long-run relationship between rainfall and runoff time series at Tangnaihai Hydrological Station in the source area of the Yellow River, and improving the accuracy of annual runoff prediction, co-integration theory and structure change co-integration theory are introduced respectively. The error correction models of rainfall and runoff in these two cases are constructed. The results show that reservoir construction and climate change can cause structure change in the long-run relationship between rainfall and runoff in the source area of the Yellow River. The breakpoints appeared in 1989 and 2002, in which the breakpoint in 1989 is mainly effected by reservoir construction while in 2002 it is effected by rainfall changes. Meanwhile, the error correction model with structural change shows that the impact of rainfall on runoff decreases from 1989 but increases from 2002. Finally, for the prediction of runoff in the next five years, the mean absolute percentage errors of the prediction models without and with breakpoints are 11.04% and 7.08% respectively, and this shows that the error correction model with structural change has the higher runoff prediction accuracy.
Funder
the National Key R&D Program of China
Outstanding Young Talent Research Fund of Zhengzhou University
Program for Innovative Talents (in Science and Technology) at University of Henan Province
State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University
Foundation for University Youth Key Teacher of Henan Province
Subject
Water Science and Technology
Reference38 articles.
1. Temporal flood incidence forecasting for Segamat River (Malaysia) using autoregressive integrated moving average modelling
2. An application of artificial intelligence for rainfall-runoff modeling
3. Recursive and sequential tests of the unit-root and trend-break hypotheses: theory and international evidence;Banerjee;Journal of Business & Economic Statistics,1992
4. Cointegration tests in the presence of structural breaks
5. A study on the cointegration forecast of runoff;Chang;Journal of Applied Sciences,2005