Variability And Interrelationship Between Evaporation And Potential Evapotranspiration

Tiewri Lyngdoh Nonglait; B. K. Tiwari; Professor

Volume : V, Issue : X, October - 2016

Variability And Interrelationship Between Evaporation And Potential Evapotranspiration

Tiewri Lyngdoh Nonglait, B. K. Tiwari, Professor

Abstract :

Evaporation and evapotranspiration are key parameters for understanding the hydrology of any ecosystem. In this study, the rates of pan evaporation and potential evapotranspiration (PET) have been measured and estimated respectively on a daily basis averaged to an annual rate. The annual pan evaporation was measured using a US Class A pan evaporimeter. The potential evapotranspiration was estimated using Thornwaite�s method. Significant monthly variations were recorded in both processes. The analysis of interrelationship between the two processes showed that both followed a dissimilar distribution pattern in the microwatershed. The PET was found to be related to rainfall while the pan evaporation did not show any correlation with rainfall.The value of empirical data on evaporation and PET in management of water resources has been underlined.