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Design

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Various design approaches and methods that are useful for wetlands design are found on this page.

Contents

Hydraulic design

Most hydraulic design is done by computers and with modelling packages. Here are modelling packages in use today:

  • BOXCAR Modified version of HY-8 for concrete box culverts
  • HEC-ResSim 3.0 Reservoir system simulation program
  • HEC-RPT 1.1 The Regime Prescription Tool is designed to facilitate entry, viewing, and documentation of flow recommendations in real-time, public settings.
  • HEC-RAS 4.0 Beta River Analysis System: one-dimensional steady flow, unsteady flow, sediment transport/mobile bed computations, and water temperature modeling.
  • HEC-HMS 3.1.0 precipitation-runoff processes of watersheds
  • HEC-SSP 1.0 Beta statistical analyses of hydrologic data
  • HEC-GeoRAS 4 preparation of geometric data for import into HEC-RAS
  • HEC-DSSVue 1.2.10b Java-based visual utilities program
  • HY-8 FHWA culvert design
  • SWMM Storm Water Management Model, dynamic rainfall-runoff simulation model (also see the Wikipedia SWMM entry)

Fema has endorsed particular models for predicting various hydraulic paramaters.

FHWA list of hydraulic models

Non-computer design methods

Before design calculations were done by computers engineers often used tables to calculate hydraulic information and one of the best resources for these tables was to use the so called "King's method." All of the desired tables for hydraulci forces and open channel flow can be found in the Handbook of Hydraulics. This is not an ordinary textbook in that Brater and King break down some of the most difficult fluid dynamic problems into table lookups in a very practical approach.

Before computers the SCS method was widely used for calculating rainfall runoff.

Seepage design

Flow nets

One of the simplest methods of checking your structure's integrity from a seepage standpoint is to use a simple old fashioned flow net. Wikipedia has nice write up about flownets complete with examples.

Lane's method

A little known but useful method of predicting seepage and estimating the danger of piping through soils is Lane's method.

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