A Nearest Neighbor Method (NNM) is used to forecast daily river flows
that were measured at a single location over a time period spanning ab
out seventy years. A parsimonious three parameter NNM is developed in
the context of Nonlinear Dynamics and the dependence between forecast
error and length of history used to construct forecasts is investigate
d. Comparison is made to Auto-Regressive Integrated Moving Average (AR
IMA) models. The NNM is found to provide improved forecasts.