Application of PCSWMM for the 1-D and 1-D–2-D Modeling of Urban Flooding in Damansara Catchment, Malaysia

Abstract

Coupled with climate change, the urbanization-driven increase in the frequency and intensity of floods can be seen in both developing and developed countries, and Malaysia is no exemption. As part of flood hazard mitigation, this study aimed to simulate the urban flood scenarios in Malaysia’s urbanized catchments. The flood simulation was performed using the Personal Computer Storm Water Management Model (PCSWMM) modeling of the Damansara catchment as a case study. An integrated hydrologic-hydraulic model was developed for the 1-D river flow modeling and 1-D–2-D drainage overflow modeling. The reliability of the 1-D river flow model was confirmed through the calibration and validation, in which the water level in TTDI Jaya was satisfactorily predicted, supported by the coefficient of determination (R2), Nash–Sutcliffe model efficiency coefficient (NSE), and relative error (RE). The performance of the 1-D–2-D model was further demonstrated based on the flood depth, extent, and risk caused by the drainage overflow. Two scenarios were tested, and the comparison results showed that the current drainage effectively reduced the drainage overflow due to the increased size of drains compared to the historic drainage in 2015. The procedure and findings of this study could serve as references for the application in flood mitigation planning worldwide, especially for developing countries.

Flood Management, Characterization and Vulnerability Analysis Using an Integrated RS-GIS and 2D Hydrodynamic Modelling Approach: The Case of Deg Nullah, Pakistan

“…In recent years, remote sensing (RS) and geographic information systems (GIS) played an important role in presenting and validating the flood risk and hazard mapping results [13,14]. RS and GIS are considered effective geospatial tools assisting in preparing the flood characteristic maps and their impacts on the environmental, social and economic aspects [15]. These geospatial tools have been extensively used to map the results of simulation models of past flood events such as flood inundation extents, flood levels and to identify the critical facilities at risk [16,17].…”

Evaluation of climate change, urbanization, and low-impact development practices on urban flooding

“…According to previous studies Niazi et al [ 55 ] and Neupane et al [ 69 ], PCSWMM achieved acceptance accuracy for flooding simulation in the study area due to NSE > 0.5, PSR ≤ 0.7, and R2 > 0.5 for both calibration and validation. Furthermore, Yim et al [ 58 , 59 ] noted that PCSWMM is a useful tool for evaluating the hydrological and hydraulic performance of the sewer system with different rainfall design storms in Phnom Penh, Cambodia [ 70 ]. In support of this, Takele et al [ 27 ] concluded that the PCSWMM was capable of assessing the impacts of urbanization and climate changes on hydrological responses and stormwater management system performance in Robe town, Ethiopia.…”

Development of a hazard risk map for assessing pedestrian risk in urban flash floods: A case study in Cúcuta, Colombia

“…The stormwater management modeling in this study was performed using PCSWMM software (version 7.4.3240) (Hamouz et al, 2020). The model was based on the solution of the 1D Saint‐Venant equations (Mohd Sidek et al, 2021) and incorporated GIS data. To create the input layers, the parameters for the 1D model, including connections, conduits, drains, and subbasins, were exported to PCSWMM from a GIS.…”