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Design and Construction of an Urban Runoff Research Facility
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Comparing modelling techniques for analysing urban pluvial flooding.

E van Dijk1, J van der Meulen2, J Kluck3

  • 1Department of Urban Water Management, Amsterdam University of Applied Sciences, Postbus 1025, 1000 BA Amsterdam, The Netherlands E-mail: e.van.dijk@hva.nl; Van Dijk Hydroconsultant, Heemstedelaan 97, 3523 KE Utrecht, The Netherlands.

Water Science and Technology : a Journal of the International Association on Water Pollution Research
|January 30, 2014
PubMed
Summary
This summary is machine-generated.

Urban flooding from intense rain is increasing. Surface flow models offer a fast way to find vulnerable areas, while coupled 1D-2D models are better for complex transitions between urban drainage and surface systems.

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Area of Science:

  • Environmental science
  • Urban planning
  • Hydrology

Background:

  • Climate change and urban densification exacerbate extreme rainfall events, increasing the risk of sewer overflows and urban flooding.
  • Municipalities must analyze both minor (sewer) and major (surface) drainage systems to mitigate urban flooding.
  • Urban flood modeling is crucial for communication and design processes.

Purpose of the Study:

  • To compare the capabilities and limitations of different urban flood modeling techniques.
  • To evaluate simulation results for an extreme rainfall event using various modeling approaches.

Main Methods:

  • Comparison of simulation results from different urban flood modeling techniques for an extreme rainfall event.
  • Evaluation of surface flow models against coupled one-dimensional (1D)-two-dimensional (2D) simulation models.
  • Utilized accurate digital elevation models for surface flow analysis.

Main Results:

  • Surface flow models are effective and rapid tools for identifying flood-prone areas in hilly and flat terrains.
  • Coupled 1D-2D simulation models provide superior results in transitional areas where minor and major drainage catchments diverge.
  • Modeling software is increasingly integrating coupled 1D-2D approaches.

Conclusions:

  • Surface flow models offer valuable initial insights for urban flood risk assessment.
  • Complex simulation models, such as coupled 1D-2D, are recommended for critical locations and complex topographical transitions.
  • A combination of modeling approaches can enhance urban flood management strategies.