GfsSourceCulvert

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	; n : [[w:Manning_formula|Manning friction coefficient]]. The default is for concrete (when using SI units).		; n : [[w:Manning_formula|Manning friction coefficient]]. The default is for concrete (when using SI units).
	; ke : entrance loss coefficient.		; ke : entrance loss coefficient.
		+
		+	=== See also ===
		+
		+	[[Object_hierarchy#Culvert|<code>culvert</code>]] module
	=== References ===		=== References ===

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Revision as of 22:25, 13 June 2012

GfsSourceCulvert approximates the effect of flow through a culvert within a GfsRiver simulation. The relationship between water levels, elevations, culvert characteristics and flow rate is based on the paper by Boyd, 1987.

The syntax in parameter files is

[ GfsSourcePipe ] { type = box B = 1 entrance = 1 n = 0.011 ke = 0 }

where the parameters are set to their default values. The parameters are

type 

either box or pipe (for a circular culvert). The box height or pipe diameter are given by the DIAMETER parameter of the parent GfsSourcePipe.

B 

for box culverts only, the box width.

entrance 

entrance type following Boyd, 1987. Entrance type 1 is Wingwall Flare 30° to 75°, Entrance type 2 is Wingwall Flare 90° and 15°, Entrance type 3 is Wingwall Flare 0°.

n 

Manning friction coefficient. The default is for concrete (when using SI units).

ke 

entrance loss coefficient.

See also

culvert module

References

M. J. Boyd - Generalised head-discharge equations for culverts

Proceedings of the fourth national local government engineering conference pp. 161-165, Perth, August, 1987

Bibtex