Abstract:
This study presents a resilience-based evaluation of an urban drainage system (UDS) under the impact of
functional and structural failure modes. Resilience based analysis is carried out using SWMM for a part of
Gurugram City of Haryana, India. For simulating the drainage system response, half-hourly rainfall data
available from GPM-IMERG was utilized to estimate the design storm of suitable duration. Sensitivity
analysis is carried out to overcome the problem of lack of in-depth data to perform model calibration and
validation. Besides, a comparison of three different estimation approaches of subcatchment width, an
important SWMM parameter, is also presented. Different rainfall and urban growth scenarios were
considered to analyse the drainage system's functional and structural resilience. For the studied UDS, a
total of 22 vulnerable nodes were identified through the structural resilience approach, and the func-
tional resilience approach revealed that urbanization has more pronounced effects on UDS than climate
change.
