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Automatic rainfall recharge model induction by evolutionary computational intelligence
Institute of Geological and Nuclear Sciences, Wairakei Research Centre, Taupo, New Zealand
Institute of Geological and Nuclear Sciences, Wairakei Research Centre, Taupo, New Zealand
Environment Canterbury, Christchurch, New Zealand
Genetic programming (GP) is used to develop models of rainfall recharge from observations of rainfall recharge and rainfall, calculated potential evapotranspiration (PET) and soil profile available water (PAW) at four sites over a 4 year period in Canterbury, New Zealand. This work demonstrates that the automatic model induction method is a useful development in modeling rainfall recharge. The five best performing models evolved by genetic programming show a highly nonlinear relationship between rainfall recharge and the independent variables. These models are dominated by a positive correlation with rainfall, a negative correlation with the square of PET, and a negative correlation with PAW. The best performing GP models are more reliable than a soil water balance model at predicting rainfall recharge when rainfall recharge is observed in the late spring, summer, and early autumn periods. The “best” GP model provides estimates of cumulative sums of rainfall recharge that are closer than a soil water balance model to observations at all four sites.
Received 17 August 2004; accepted 13 May 2005; published 26 August 2005.
Citation: (2005), Automatic rainfall recharge model induction by evolutionary computational intelligence, Water Resour. Res., 41, W08422, doi:10.1029/2004WR003577.
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