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Table Of Contents
Calculating Hydraulic Values for Structural Components
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Sample Hydrology Files
sample.clt Culvert file
sample.gpd Graphical Peak Discharge file (TR-55 Graphical)
sample.rat Rational Method file
sample.sim Storage Indication Method file
sample.tab TR-55 Tabular Hydrograph Method file
stgdis.sdc Stage Discharge Curve
stgstr.ssc Stage Storage Curve
postdev.hdc Post-Development Hydrograph
predev.hdc Pre-Development Hydrograph
post-dev.tab TR-55 Tabular Hydrograph Method file
orange.idf Intensity Duration Frequency file
hec205.dat HEC-2 Cross Sections (not processed by HEC)
example.idf Intensity Duration Frequency file
Calculating Hydraulic Values for Structural
Components
Autodesk Civil Design provides calculator-type dialog boxes that you can use to
automate your hydrology calculations. These calculators use standard hydrology
equations to output design parameters for culverts, channels, pipes, risers,
orifices, and weirs.
Hydrology calculator dialog boxes enable you to solve for an unknown value. In
these dialog boxes, you can select the value you want to solve for, and then
enter known values in the appropriate edit fields, or you can pick the values
from the drawing or from another editor dialog box.
The calculator dialog boxes allow you to enter values as equations or in
different units:
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You can enter values as mathematical equations. For example, if the required
diameter is 36 in. and the required flow percentage in a particular channel is
75%, enter 36*0.75, and the value 27.0 is displayed.
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You can also specify the value in any units and this value is converted
automatically to the setting units. For example, if the units are in inches,
enter 2ft, and the value 24 is displayed.
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Calculator dialog boxes store the changes that you make to the current
values. If you click OK when you exit a dialog box, the next time you enter
the dialog box the last values used will be returned.