Performance assessment of urban drainage system (Case Study: District 10 of Tehran Municipality)

Negin Binesh, Mohammad Hossein Niksokhan, Amin Sarang


A drainage system degrades by multiple factors and its performance reduces in time. Since such infrastructure play a key role in preventing urban floods, their performance should be monitored and quantified. The present research is aimed at simulation of urban drainage network of district 10 of Tehran Municipality in Iran, and focuses on hydraulic assessment of drainage system’s level of service. Indicators of reliability, resiliency, and vulnerability are used to evaluate the system’s performance. Inundation spots were determined in the study area, and three performance indices were calculated for all conduits and the whole system. The results indicate that some conduits in the urban drainage network are in critical condition and should be rehabilitated, while the others represent an acceptable performance in conveying the urban runoff and do a nice job in preventing urban flooding in the region. Reliability of the system is acceptable, and vulnerability is relatively low, and system represent a relatively high percent of resiliency; however, applying sustainable drainage approaches are still required considering climate change and continuous urban development.

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