Study on the Evaporation and Evapotranspiration Measured on the Căldăruşani Lake (Romania)

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Abstract

Evaporation and evapotranspiration are major components of the water cycle and water balance. Studying them allows a better knowledge and understanding of the mechanisms and regularities that guides the water circulation in nature and also its associated processes. The general aim of this study is to analyze the evaporation and evapotranspiration measured on the Căldăruşani Lake, and their influence on the lake's water volume. The paper highlights: i) the temporal variation of the measured values of the evaporation and evapotranspiration and the influence of some controlling parameters (mainly climatic) on these processes; ii) the relationship between the evaporation and evapotranspiration; and iii) the volume of water loss by evaporation and evapotranspiration, influencing the lake's water resource. The study is based on climatic, hydrologic and morphometric data of the Căldăruşani Lake. The analysis is performed for the 2009-2014 period by using statistical and mathematical methods (for example, linear correlations or equations to estimate the volume of water loss by evaporation). The results show higher values of the evapotranspiration (10.3 mm/day) than those of the evaporation (4.3 mm/day). The volume of water loss by evaporation and evapotranspiration from the Căldăruşani Lake, in 2014, was around 2.9 mil.m3 (almost 1/3 of lake's volume).

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