been investigated by many authors, the use of nonlinear autoregressive networks with
exogenous inputs (NARX) is relatively new. For this work NARX were applied to obtain
groundwater level forecasts for several wells in southwest Germany. Wells in porous,
fractured and karst aquifers were investigated and forecasts of lead times up to half a year
were conducted for both influenced (eg nearby pumping) and uninfluenced wells …