Dual Drainage Design - Solutions

By: Computational Hydraulics  09-12-2011

Unlimited network sizes and unlimited time steps are allowed, and the dual drainage systems need not be parallel (they may flow in arbitrary directions). Unlimited numbers and sizes of control devices and storages are allowed on both systems. Sensitivity, optimization/calibration and error analysis tools are provided for optimal design. Time-steps are semi-infinitely variable, and the usual infiltration and runoff-generating options, such as triangular unit hydrographs, are optionally available. The program will also automatically determine the minimum conveyance sizes required, including estimation of required minimum storages.

If your application includes simultaneous surface ponding, street flooding and surcharged pipes, you should step up to dynamic analysis of dual systems, with dynamic wave routing allowing for flexible inlet control, catchbasin flooding and reverse flow, street/gutter flow and overland routing, accurate surcharge and pressure flow pipe modeling, inlet/outlet controls, flooded and ponded areas, trap-lows, and much more.

  • Automate the creation of your major system with the Dual Drainage Creator
  • Easily develop detailed street cross-sections with the Street Designer
  • Efficiently assign inlet control (based on rating curves or capacity) for individual catchbasins or aggregated inlets
  • Automatically adjust junction inverts to meet minimum slope criteria
  • Accurately model manhole drops and account for varying energy losses at junctions
  • Create design storms for both major and minor events with the comprehensive storm distribution library in the Design Storm Creator tool, including standard SCS, Huff, AES, Chicago, etc. as well as locally-required design storm distributions
  • Automatically size pipes based on computed peak flows
  • Quickly tweak and test design parameters (diameters, inverts, etc.) directly in the profile view for computed HGL
  • Easily check for design criteria such as depth of cover, minimum slope, etc.
  • Perform long term, continuous modeling verification of dual drainage performance
  • Compare design alternatives with comprehensive scenario analysis graphs, profiles and reports


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