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The chaotic behavior of groundwater depth time series is investigated using correlation dimension method and the CAO method based on the reconstruction of phase-space. A groundwater depth time series, each five days series of 25 years (with a total of 1793 values) observed in Hetao irrigation district of Yellow River basin, China, is studied. Results show that the chaotic character of groundwater level may exist under the natural condition, chaotic analysis on groundwater depth time series offer theoretical basis and gist for groundwater depth forecasting.

Chaotic Analysis on Series of Groundwater Depth in Hetao Irrigation District