Calibration of SWMM Model in North catchment of Tehran

Document Type : Research Paper


1 Water Engineering Department, ,Ferdowsi University of Mashhad

2 Ferdowsi University of Mashhad

3 Water Engineering Department, Ferdowsi University of Mashhad


In this study SWMM software has been calibrated with real meteorological and hydrometric data at the North of Tehran basins and simulation parameters have been obtained. For this purpose, five rainfall events and runoff data related to these rainfalls, recorded at the outlet of Zargandeh catchment were used. This model is calibrated with three events and verified with two other events. Also, in this simulation the peaks of flood, outflow hydrographs, runoff volumes and peak flood times is obtained. The root mean square error are obtained for outlet hydrographs for the first to fifth events were 0.05, 0.22, 0.4, 0.37 and 0.16, and the Nash-Sutcliffe coefficient are obtained 0.91, 0.94, 0.93, 0.9 and 0.94, respectively. Also, the percentage of difference of the flood discharge peak modeling and observations for first to fifth events are calculated 7.33%, 9.69%, 5.8%, 5.6% and 9.93% and for runoff volume, this percentage difference are calculated -8.82%, -3.08%, 8.8%, -19.43% and 5.11%, respectively. Based on these results, the performance and application of this model to simulate runoff in this area is acceptable and can be used to manage and control urban runoff.


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Volume 73, Issue 4
March 2021
Pages 709-724
  • Receive Date: 07 March 2020
  • Revise Date: 11 March 2021
  • Accept Date: 25 December 2020
  • First Publish Date: 19 February 2021