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modeling pvc pipes in gravel swale

modeling pvc pipes in gravel swale

modeling pvc pipes in gravel swale

(OP)
i currently have a gravel swale in one of the subcatchments

i want to embed pvc pipes in the swale for storage

how to i do this? do i model them as ponds?

RE: modeling pvc pipes in gravel swale

(OP)
sorry

its not a pvc, its a series of hdpe pipes



RE: modeling pvc pipes in gravel swale

Read the HydroCad Help on "embedded storage".

RE: modeling pvc pipes in gravel swale

(OP)
can I model these on a slope

continuous x-section area with both top and bottom sloped @ 7%, side slope = 0

??

RE: modeling pvc pipes in gravel swale

You can specify a slope for horizontal cylinder storage (your pipe), but the other storage volumes are always level.  However, you should be able to model this by using custom storage and entering surface areas.

RE: modeling pvc pipes in gravel swale

(OP)
psmart, thanks for your help but I am trying and can not figure it out, I have tried custom stage data but it keeps telling me that my pipe is extending above my stone?

do I need to fill ou the incremental storage and cum storage?


is there any way you could kind of walk me through it if you have a few minutes of spare time?

could you kind of walk me through an example

say I have a 12" pipe imbedded in a 2'x2' stone, both sloping @ 10% for 10'


start
top stone: 2.5'
top pipe: 2'
inv pipe:1.5'
bot stone:1'
end
top stone:1.5'
top pipe:1'
inv pipe:.5'
bot stone:0'

if anyone can help it would be greatly appreciated

thanks in advance

RE: modeling pvc pipes in gravel swale

(OP)
i think i figured it out, i was forgetting to multiply the length by the width of the bed for the sa

thanks

RE: modeling pvc pipes in gravel swale

(OP)
nope i didnt figure it out

im stuck again

the program keeps saying my pipes are above the imbedded storage

arrrrgh

RE: modeling pvc pipes in gravel swale

The message means that the top of the pipe extends above the highest stage in the storage definition.

Remember the invert elevation for any storage volume is always the lowest point, which corresponds to the "outlet" of a pipe.  Perhaps you've entered the upper (inlet) elevation instead?

RE: modeling pvc pipes in gravel swale

(OP)
thanks again psmart,

after traying over and over I realized that I was modeling from the invert in down stream when i should have been modeling from the downstream invert



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