Evaluate the performance of urban runoff collection network in semi-arid areas affected by climate change
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Article Type:
Research/Original Article (دارای رتبه معتبر)
Abstract:
The purpose of the current research is to evaluate the performance of the drainage network and flood control nodes in the base period (1980-2020) and under the influence of climate change for 25 and 50-year return periods in the central part of Tehran's sixth district. The results of calibration and validation of the model showed a good fit between the observational data and the simulation. So that the value of coefficient (NS) in the calibration stage for the first to third event is 0.77, 0.72 and 0.64 respectively and this coefficient was obtained in the validation stage for two events, 0.72 and 0.70, respectively. the drainage network was evaluated for the return period of 25 and 50 years for the base period and under the influence of climate change. The results showed that with the increase of the return period in the base period and in the future, there is overflow and flooding in some flood channels and nodes of the drainage network, so that the number of flood nodes in the base period (1980-2020) and under the influence of climate change scenario RCP2.6 and RCP8.5(2021-2050) for the 25-year return period is 10, 13 and 15 respectively. The number of flood nodes in the base period (1980-2020) and under the influence of climate change scenario RCP2.6 and RCP8.5(2051-2100) for the 50-year return period are 12, 17 and 19, respectively. Increasing the dimensions of channels and implementing methods (LID) is an operational solution to solve the problem of elevation.
Language:
Persian
Published:
Iranian Journal of Eco Hydrology, Volume:9 Issue: 4, 2023
Pages:
783 to 795
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