Assessing the Effects of Climate Change on Temperature and Precipitation using CMIP6 models (case study: Damghan, Iran)

Document Type : Original Article


1 M.Sc. of Water Resource Management and Engineering, Faculty of Civil Engineering, Semnan University, Semnan, Iran.

2 Professor, Department of Water Engineering and Hydraulic Structures, Faculty of Civil Engineering, Semnan University, Semnan, Iran.



Nowadays, one of the most fundamental challenges for human society and the natural environment is climate change. Human activities play an important role in increasing the temperature in different temporal-spatial scales. In this research, the sixth report scenarios of climate change by IPCC were used to evaluate the effects of climate change on the Temperature and Precipitation in Damghan, Iran. Climate change occurrence was predicted by using the HadGEM3 and CanESM5 models under the SSP126, SSP245, and SSP585 scenarios. The rainfall data from the Damghan synoptic meteorological station and Damghan rain gauge station have been used for calibration and validation for the 2000-2020 period. Then, a prediction was made for the 2020-2040 period. To predict the future temperatures (2020- 2040), minimum and maximum temperature data from the Damghan synoptic station was used. LARS-WG6 software was applied for the statistical downscaling of climatic data. Then, by using the predicted temperatures and rainfall under the climate change scenarios, the outflow intensity and pollution load of the reservoir water for 2020-2040 was presented. Considering the increase in the pollution load in some seasons and months and the downstream use of water, the construction of a water treatment plant and prevention of pollutants from entering the urban drinking water network is suggested. If management methods are planned and applied, the water quality of the dam reservoir can be improved.


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