To understand the runoff-sediment discharge relationship , this study examined the annual runoff and
sediment discharge data obtained from the Tangnaihai hydrometric
station. The data were decomposed into multiple time scales through
Complete Ensemble Empirical Mode Decomposition with adaptive noise
(CEEMDAN). Furthermore, double cumulative curves were plotted and the
cointegration theory was employed to analyze the microscopic and
macroscopic multi-temporal correlations between the runoff and the
sediment discharge and their detailed evolution.