Jahangeer Porhemmat - Academia.edu (original) (raw)
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Papers by Jahangeer Porhemmat
Open Journal of geology, 2018
Water science and engineering, Mar 1, 2016
Russian Meteorology and Hydrology, Mar 1, 2017
Ain Shams Engineering Journal, Dec 1, 2020
Abstract The study aimed to evaluate the uncertainty indices in reservoir performance of Namrood-... more Abstract The study aimed to evaluate the uncertainty indices in reservoir performance of Namrood-Dam(Iran) that affected by climate change. To this end, downscaling was performed for the future period using the output of the EC-EARTH-GCM under the RCP scenarios and employing the LARS-WG6 model. The uncertainty in reservoir performance of under the current and climate change conditions, and 85% and 70% of the agricultural demand was evaluated using the WEAP. Based on the results, the reduction of inflow by 8.36% and 12.64% under RCP4.5 and RCP8.5, respectively, resulted in decreasing of the performance indices. In addition, 30% reducing the agricultural demand under the RCP4.5 had the highest values of sustainability index (SI) and its range for Firouz Kouh and Garmsar agriculture decreased by 20.64% and 34.2%, respectively. The ranges of SI variation were lower in comparison with the other indices, and accordingly, it enjoyed higher reliability for evaluating the system state.
Civil engineering infrastructures journal, Jun 1, 2019
Environmental Earth Sciences, Feb 1, 2018
Iranian Journal of Watershed Management Science and Engineering, Oct 15, 2016
Research Journal of Environmental Sciences, Mar 1, 2009
فصلنامه علمی-پژوهشی علوم زمین, Feb 20, 2018
Arabian Journal of Geosciences
Journal of Agrometeorology, 2021
Intensity-duration-frequency (IDF) curves are among the standard design tools for many engineerin... more Intensity-duration-frequency (IDF) curves are among the standard design tools for many engineering applications such as urban drainage management. Since climate change may considerably affect precipitation, updating of IDF curves is highly necessary. The present study aims to examine the impacts of climate change on IDF curves of Shiraz synoptic station using downscaled outputs of Hadcm3 AOGCM under various emission scenarios (A1B, A2,B1) applying larswg-5 model for the period of 2046 to 2065. The fitted Gumbel distribution was used to estimate the maximum short-term precipitation quantiles in the base period (1968-2000) and the verified empirical Bell type equation was used for the future period. The results show that the mean of maximum daily precipitation and annual precipitation will decrease in the future. Also, the maximum precipitation intensities up to 60 min duration will reducefrom 0.15 mm hr-1 to about 10.79 mm hr-1 compared to the observed period in all returns periods a...
Iranian Journal of Watershed Management Science and Engineering, 2010
Applied Ecology and Environmental Research, 2017
Open Journal of geology, 2018
Water science and engineering, Mar 1, 2016
Russian Meteorology and Hydrology, Mar 1, 2017
Ain Shams Engineering Journal, Dec 1, 2020
Abstract The study aimed to evaluate the uncertainty indices in reservoir performance of Namrood-... more Abstract The study aimed to evaluate the uncertainty indices in reservoir performance of Namrood-Dam(Iran) that affected by climate change. To this end, downscaling was performed for the future period using the output of the EC-EARTH-GCM under the RCP scenarios and employing the LARS-WG6 model. The uncertainty in reservoir performance of under the current and climate change conditions, and 85% and 70% of the agricultural demand was evaluated using the WEAP. Based on the results, the reduction of inflow by 8.36% and 12.64% under RCP4.5 and RCP8.5, respectively, resulted in decreasing of the performance indices. In addition, 30% reducing the agricultural demand under the RCP4.5 had the highest values of sustainability index (SI) and its range for Firouz Kouh and Garmsar agriculture decreased by 20.64% and 34.2%, respectively. The ranges of SI variation were lower in comparison with the other indices, and accordingly, it enjoyed higher reliability for evaluating the system state.
Civil engineering infrastructures journal, Jun 1, 2019
Environmental Earth Sciences, Feb 1, 2018
Iranian Journal of Watershed Management Science and Engineering, Oct 15, 2016
Research Journal of Environmental Sciences, Mar 1, 2009
فصلنامه علمی-پژوهشی علوم زمین, Feb 20, 2018
Arabian Journal of Geosciences
Journal of Agrometeorology, 2021
Intensity-duration-frequency (IDF) curves are among the standard design tools for many engineerin... more Intensity-duration-frequency (IDF) curves are among the standard design tools for many engineering applications such as urban drainage management. Since climate change may considerably affect precipitation, updating of IDF curves is highly necessary. The present study aims to examine the impacts of climate change on IDF curves of Shiraz synoptic station using downscaled outputs of Hadcm3 AOGCM under various emission scenarios (A1B, A2,B1) applying larswg-5 model for the period of 2046 to 2065. The fitted Gumbel distribution was used to estimate the maximum short-term precipitation quantiles in the base period (1968-2000) and the verified empirical Bell type equation was used for the future period. The results show that the mean of maximum daily precipitation and annual precipitation will decrease in the future. Also, the maximum precipitation intensities up to 60 min duration will reducefrom 0.15 mm hr-1 to about 10.79 mm hr-1 compared to the observed period in all returns periods a...
Iranian Journal of Watershed Management Science and Engineering, 2010
Applied Ecology and Environmental Research, 2017