Effect of climate change on potential evapotranspiration: a case study on Gharehsoo sub-basin, Iran
by Mohammad Abdolhosseini; Saeid Eslamian; Sayed-Farhad Mousavi
International Journal of Hydrology Science and Technology (IJHST), Vol. 2, No. 4, 2012

Abstract: Potential evapotranspiration (ET₀) as an important factor in hydrologic cycle has a key role in integrated watershed management practices. Moreover, study of the lack of precipitation with respect to ET₀ is one of the main references in management of extreme events. In this study, Gharehsoo sub-basin as a part of Caspian Sea watershed located in Golestan province at Northern Iran is studied to indicate the impact of climate change on ET₀ for future periods in such basin with high flood tendency. The A2 emission scenario, HadCM3 and SDSM downscaling models were applied. The results indicate that the amount of precipitation will increase in December, January, and February and decrease in other months and the amounts of ET₀ in all future periods will be significantly lower than its amount in the past. For all future periods, the impact of climate change has appeared by reducing precipitation and ET₀ in such a way that the reduction of ET₀ is more than the reduction of precipitation. The noticeable point is that this difference beside the trend of monthly variations in precipitation will lead to higher flood tendency which directly make it essential to apply climate change adaptation procedures.

Online publication date: Sat, 16-Aug-2014

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