Reliable river flow forecasting is a key element in achieving sustainable water resources and environmental management. Accurate short term and long term river flow forecasts are particularly essential for the design of hydraulic structures, flood and drought analysis, irrigation scheduling, reservoir operation and environmental planning. Due to stochastic characteristics of hydrological events, forecasting the future condition of surface water is always associated with uncertainty. In this work an attempt is made to develop highly accurate river flow forecasting models. Wavelet...