Study on the Chaos Kinetic Characteristic and Forecasting of the Groundwater Movement
Lianhai Cao · Yellow River · 2013
The dynamic characteristic of the groundwater evolvement can be synthetically reflected through the groundwater level dynamic movement.The time series of No.2 well groundwater level inYuzhou City were selected as a study object,and 1 500 data of 21 years ago were chosen to open out chaos kinetic characteristic.By G-P arithmetic,the relation dimension d was calculated to be 1.67,and the best embedding dimension m equals 5.Adopting complex self-correlation method to calculate time-delay τ,so τ=78 d.Using C-C arithmetic to get τ=78 and m=5.Finally,the Maximum Lyapunov index was calculated,so λ1=0.010 30,and it indicated the dynamic characteristic of the groundwater movement had chaos characteristic.Then a good result was got by forecasting the groundwater level based on Lyapunov exponents.