Journal of Range and Watershed Managment

Evaluating The Performance of SWMM Model to Simulate Urban Runoff Hydrograph (Case Study: The Part of District 22 of Tehran)

Document Type : Research Paper

Authors

Fariba Zakizadeh 1
Alireza Moghaddam Nia 2
Ali Salajegheh 3
Abdollah Ardeshir 4

1 Faculty of Natural Resources, Tehran University

2 Associate Prof., Faculty of Natural Resources,Tehran University, Karaj

3 Professor, Faculty of Natural Resources, Tehran University, Karaj

4 Associate Prof., Faculty of civil engineering, Amirkabir University

https://doi.org/10.22059/jrwm.2020.296374.1453
Abstract
Over the past few decades due to population growth and urban development, urban runoff has increased and led to different problems such as inundation of urban pathways, dissemination of environmental pollutions and flood hazards. In order to urban runoff management, it is necessary to estimate runoff rate correctly. SWMM is one of the most widely used models in estimating urban runoff. The goal of this research is to evaluate the performance of SWMM model in simulating flow rate in an urban watershed in District 22 of Tehran. At first, model required parameters were calculated. For model evaluation and validation, in three events, runoff was measured in the watershed outlet and was compared with simulated runoff. The model validation results showed that the simulated flow rates had good adaptation with the observed ones. The validation results were used for estimating optimum values of model input parameters. The results of SWMM model evaluation confirm model accuracy with NS= 0.72 and RSR= 0.53 and indicate the model ability in simulating urban runoff. So, SWMM model can be used for urban runoff management plans and designing urban runoff drainage networks in this area.

Keywords

sensitivity Analysis
urban Runoff
verification
SWMM model
calibration
Journal of Range and Watershed Managment
Volume 73, Issue 2
Summer 2020
Pages 337-346

  • Receive Date 21 January 2020
  • Revise Date 29 April 2020
  • Accept Date 29 April 2020
  • Publish Date 22 August 2020

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