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首页> 外文期刊>International journal of hydrology science and technology >Effect of climate change on potential evapotranspiration: a case study on Gharehsoo sub-basin, Iran
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Effect of climate change on potential evapotranspiration: a case study on Gharehsoo sub-basin, Iran

机译：气候变化对潜在蒸散的影响：以伊朗Gharehsoo盆地为例

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摘要

Potential evapotranspiration (ET_0) 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 ET_0 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 ET_0 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 ET_0 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 ET_0 in such a way that the reduction of ET_0 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.
机译：潜在蒸散量（ET_0）是水文循环中的重要因素，在流域综合管理实践中具有关键作用。此外，关于ET_0缺乏降水的研究是处理极端事件的主要参考之一。在这项研究中，研究了位于伊朗北部Golestan省里海流域一部分的Gharehsoo子流域，以表明这种高洪水趋势的盆地未来气候变化对ET_0的影响。应用了A2排放情景，HadCM3和SDSM缩减模型。结果表明，降水量将在12月，1月和2月增加，而在其他月份减少，未来所有时期的ET_0量将大大低于过去。在未来的所有时期中，气候变化的影响都以减少降水和ET_0的方式出现，使得ET_0的减少比降水的减少更多。值得注意的一点是，除了降水量每月变化的趋势以外，这种差异将导致更高的洪水趋势，这直接导致必须应用气候变化适应程序。

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