Comparison and Measurement of Evaporation From Water Surface of the Reservoirs in Arid Areas and Evaluation of A Glass Cover to Reduce Evaporation

Document Type: Research Paper


1 1*. Associate Professor, Department of Civil Engineering, Faculty of Shahid Nikbakht Engineering, University of Sistan and Baluchestan, Zahedan, Iran, Tel: (+98) 5431136430, Fax: (+98)5433447092, (corresponding author).

2 2. MSc. Graduate, Department of Civil Engineering, Faculty of Shahid Nikbakht Engineering, University of Sistan and Baluchestan, Zahedan, Iran.

3 3. Associate Professor, Department of Civil Engineering, Faculty of Shahid Nikbakht Engineering, University of Sistan and Baluchestan, Zahedan, Iran,

4 4. Ph. D. Candidate, Department of Civil Engineering, Faculty of Shahid Nikbakht Engineering, University of Sistan and Baluchestan, Zahedan, Iran.


 Every year, significant amounts of freshwater are disappeared from watersheds by evaporation. Many regions of the world have been struggling with arid and semi-arid climates in recent decades. The problem of water shortage that is induced by water evaporation from lakes and water reservoirs or water use for irrigation and domestic consumption has turned into a grave challenge, especially in summer. The present experimental study focuses on the accurate measurement of evaporation and presents a novel approach to decreasing this phenomenon in the south-east of Iran (Zahedan). For this purpose, four ponds with dimensions of 120x95x70 (length, width, and depth) were constructed in Zahedan’s Meteorological Organization field in order to be compared with the results of induced class-A evaporation pan. Two daily time periods (30 days) were selected to measure hydrologic parameters with respect to the spring and summer conditions as well. After the experimental results were evaluated, six relations were extracted for the accurate estimation of evaporation in arid zones. Finally, a composition type of glass physical covers was fabricated and used to decrease evaporation. The cover was made of waste glass, rubber and some glue for the buoyancy. Solar radiation and air free oxygen were allowed to be in contact with the water surface. The results showed that the rate of evaporation decreased by up to 40 percent using these covers just for the 50 percent of the surface covering.


  1. Penman, H.L., 1948. Natural evaporation from open water, bare soil and grass. Proc. R. Soc. Lond. A, 193(1032), pp.120-145.
  2. Dalton, J., 1802. Experiments and observations to determine whether the quantity of rain and dew is equal to the quantity of water carried off by the rivers and raised by evaporation: With an enquiry into the origin of springs. R. & W. Dean.
  3. Rohwer,carl,1943; Evaporation from different types of pans. Proe. Amer. Soc. Civil Engrs.,59,223-253;1943.Trans.Amer. Soc.civil Engrs.,99,673-703.
  4. Meyer, A.F. 1928. The Elements of Hydrology, 2nd edition. New York: John Wiley & Sons
  5. Alvarez, V.M., Baille, A., Martínez, J.M. and González-Real, M.M., 2006. Efficiency of shading materials in reducing evaporation from free water surfaces. Agricultural Water Management, 84(3), pp.229-239.
  6.  Bastiaanssen, W.G.M. and Bandara, K.M.P.S. 2001 Evaporative depletion of irrigated watersheds in Sri Lanka. Irrig. Sci. 2001 21 1-15.
  7. Tanny, J., Cohen, S., Assouline, S., Lange, F., Grava, A., Berger, D., Teltch, B. and Parlange, M.B., 2008. Evaporation from a small water reservoir: Direct measurements and estimates. Journal of Hydrology, 351(1-2), pp.218-229.
  8. Aschonitis, V.G., Antonopoulos, V.Z. and Papamichail, D.M., 2012. Evaluation of pan coefficient equations in a semi-arid Mediterranean environment using the ASCE-standardized Penman-Monteith method. Agricultural Sciences, 3(01), p.58.
  9. McJannet, D.L., Webster, I.T. and Cook, F.J., 2012. An area-dependent wind function for estimating open water evaporation using land-based meteorological data. Environmental modelling & software, 31, pp.76-83.
  10. McMahon, T.A., Peel, M.C., Lowe, L., Srikanthan, R. and McVicar, T.R., 2013. Estimating actual, potential, reference crop and pan evaporation using standard meteorological data: a pragmatic synthesis. Hydrology and Earth System Sciences, 17(4), pp.1331-1363.
  11. Sheikh, V. and Mohammadi, M., 2013. Evaluation of reference evapotranspiration equations in semi-arid regions of northeast of Iran. International Journal of Agriculture and Crop Sciences, 5(5), p.450.
  12. Lu, T., Lü, X. and Viljanen, M., 2014. Prediction of water evaporation rate for indoor swimming hall using neural networks. Energy and Buildings, 81, pp.268-280.
  13. Kumar, N. and Arakeri, J.H., 2015. Natural Convection Driven Evaporation from a water surface. Procedia IUTAM, 15, pp.108-115.
  14. Shilo, E., Ziv, B., Shamir, E. and Rimmer, A., 2015. Evaporation from Lake Kinneret, Israel, during hot summer days. Journal of Hydrology, 528, pp.264-275.
  15. Bruton, J.M., McClendon, R.W. and Hoogenboom, G., 2000. Estimating daily pan evaporation with artificial neural networks. Transactions of the ASAE, 43(2), p.491.
  16. Kişi, Ö., 2006. Daily pan evaporation modelling using a neuro-fuzzy computing technique. Journal of hydrology, 329(3-4), pp.636-646.
  17.  Vanzyl, W.H., De Jager, J.M. and Maree, C.J., 1989. The relationship between daylight evaporation from short vegetation and the USWB Class A pan. Agricultural and forest meteorology, 46(1-2), pp.107-118.
  18. 21. Hashemi Monfared, S.A., Dehghani Darmian, M., 2016. Evaluation of Appropriate Advective Transport Function for One-Dimensional Pollutant Simulation in Rivers. Int. J. Environ. Res. 10 (1),77-84.
  19. 22. Hashemi Monfared, S.A., Dehghani Darmian, M., Snyder, S.A., Azizyan, G., Pirzadeh, B., Azhdary Moghaddam, M., 2017. Water Quality Planning in Rivers: Assimilative Capacity and Dilution Flow. Bull Environ Contam Toxicol, 99 (5), 531-541.
  20. 23. Dehghani Darmian, M., Hashemi Monfared, S.A., Azizyan, G., Snyder, S.A. Giesy, J.P., 2018. Assessment of tools for protection of quality of water: Uncontrollable discharges of pollutants.        Ecotox Environ Safe. 161, 190-197.
  21. 24. Anonymous, 2005. Flexible solutions. Website accessed on 1 March 2005.
  22. 25. Watts, P.J., 2005. Scoping Study: Reduction of Evaporation from Farm Dams. Final Report to the National Program for Sustainable Irrigation. Feedlot Services Australia Pty Ltd, Toowoomba, Australia.
  23. 27. Nordbo, A., Launiainen, S., Mammarella, I., Leppäranta, M., Huotari, J., Ojala, A. and Vesala, T., 2011. Long‐term energy flux measurements and energy balance over a small boreal lake using eddy covariance technique. Journal of Geophysical Research: Atmospheres, 116(D2).
28. Tanny, J., Cohen, S., Berger, D., Teltch, B., Mekhmandarov, Y., Bahar, M., Katul, G.G. and Assouline, S., 2011. Evaporation from a reservoir with fluctuating water level: Correcting for limited fetch. Journal of hydrology, 404(3-4), pp.146-156.