Selection of appropriate evaporation estimation technique for continuous modeling

The importance of evaporation in hydrologic modeling has been investigated by analysis of water budget at various scales and application of a water ma nagement model at plot scale. The data at all scales indicate that evaporat ion constitutes a major hydrological output. Accurate determination of wate rshed evapotranspiration depends upon appropriate accounting for the variou s components of evapotranspiration and their areal and temporal variability . An application of a water management model has revealed that the ranking of the sensitivity of input parameters depends upon the method of determina tion of evapotranspiration.