Predicting river dissolved oxygen in complex watershed by using sectioned variable dimension fractal method and fractal interpolation

摘要

Fractal method has been widely applied to many different fields since it can reveal the hidden methodological structures of the sophisticated phenomena in the natural world and obtain more reasonable prediction results. This paper deals with the feasibility of predicting dissolved oxygen (DO) in complex watershed system using fractal method. It adopted sectioned variable dimension fractal model to predict river DO, and yielded satisfactory results with relatively high prediction accuracy. The absolute values of percent relative errors were all less than 6%, most less than 4%. Fractal interpolation method was also employed to simulate river DO by plotting interpolation DO graphs. These findings have important application potential in terms of water DO prediction in complex watershed system.