@article{Masahiro Yamashita_Hiroyuki Ii_2017, title={ESTIMATION OF EVAPORATION RATE OF SURFACE WATER USING HYDROGEN AND OXYGEN ISOTOPIC RATIOS}, volume={11}, url={https://geomatejournal.com/geomate/article/view/2665}, abstractNote={<p>Both evaporation rate and temperature can be estimated from δD and δ18O values of water before<br>and after evaporation. From laboratory evaporation test results of water under uniform temperature condition,<br>relations between evaporation rate, δD and δ18O values of water before and after evaporation were expressed at<br>each temperature as the following equations, Y = -0.44X1+ 12.67X2 + 50.90 : 20 degrees C, Y = 0.30X1+ 1.88X2<br>+ 41.86 : 25 degrees C, Y = -1.70X1+11.80X2+ 7.74 : 30 degrees C, Y = -0.11X1 + 6.37X2+ 34.74 : 35 degrees<br>C, Y = -0.71X1 + 6.82X2+ 35.11: 40 degrees C and Y = -0.17X1 + 4.94X2 +30.05 : 50 degrees C. Y is evaporation<br>rate. X1 is δDae – δDbe – 51.3. X2 is δ18Oae - δ18Obe -7.52. δDbe and δDae are δD values of water before and<br>after evaporation. δ18Obe and δ18Oae are δ18O values of water before and after evaporation. Evaporation<br>temperature can be also estimated from δD and δ18O values of water before and after evaporation. Relation was<br>expressed by the equation, (δDae – δDbe – 51.3) / (δ18Oae - δ18Obe -7.52) = -0.064 × temperature + 7.45. From<br>δD and δ18O distribution map of water before and after evaporation, both evaporation rate and temperature can be<br>also estimated.</p>}, number={26}, journal={GEOMATE Journal}, author={Masahiro Yamashita and Hiroyuki Ii}, year={2017}, month={Oct.}, pages={2659–2664} }