Calibration and Evaluation of the SWMM Model in Runoff Simulation in District 9 of Mashhad City
Message:
Abstract:
Urban runoff problems are comprised of two distinct but interdependent types. To control the quantity and quality, volume and the peak flow of runoff, downstream flooding and the flooding potential in the downstream must be reduced. These problems are subject to conducted flood control systems and methods. Nowadays, the protection of receiving waters is one of the engineers' concerns which cannot be simply achieved due to its reliance on the complexity and fluctuation of the flood. This needs comprehensive planning, design, and management of such systems which can be obtained through an efficient method and by use of urban runoff calculation and control models. In this research, the runoff simulation of district 9 of Mashhad municipality is carried out using the SWMM model. To calibrate and evaluate the model, 4 and 2 rainfall occurrences were measured at the basin outlet. The model calibration results showed a good agreement between the simulations of the four incidents with a NS higher than 0.5. The evaluation results confirm the SWMM model’s performance and accuracy for NS values above 0.5. For simulated incidents derived from the calibration and validation of the SWMM model, the Kling Gupta (KGE) index values was higher than 0.5. These values confirm the model results. Therefore, there is a good agreement between the simulated and observed runoff volumes which is an indication of the good performance of the SWMM model in predicting urban flood and this model can then be used in urban flood management projects and drainage network planning in Mashhad.
Language:
Persian
Published:
Journal of Water and Sustainable Development, Volume:5 Issue: 2, 2019
Pages:
91 to 100
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