Paper Details

ABSTRACT

In this study, the Evaporation losses at Dharoi dam is studied. The data like temperature, wind speed, relative humidity and pan evaporation are collected and analysis is done taking in account five different methods for computation, those methods are Meyer’s method, Rohwer’s method, Papadakis method, BlaneyCriddle method, Thornthwaite method and Evaporation rates are estimated using these five different methods. The computed values of evaporation rates are compared with the values of evaporation measured by Pan.The most efficient method is Papadakis method for the period of 2001 to 2014. The average evaporation rate isfromPapadakis method evaporation values obtained from the calculation were ranging from 0.15 mm/day to 5.96 mm/day with an average of 3.16 mm/day. These values are near to the Pan Evaporation values. For improving the results of the values of the Evaporation (mm/day) from the different methods. In season wise computation, the Thornthwaite method is suggested for winter season and Papadakis method is suggested for summer and monsoon season. The Correction factors are determined for all the seasons of each method. The Statistical analysis is also done for each method. From statistical analysis, Thornthwaite method is the most efficient method for computing evaporation rate.