Surface water flow rate calcs

[jparker86]

Hey
Anyone here got any modelling software to see how much attenuation I'll need for approx 1200m2 of roof and car park area discharging at 5l/sec

[mondeoman]

3dB

[TonyRPH]

This thread of any use?

And this site although that deals with draining a tank.

This may be what you are looking for however the site requests an email address to which the results are sent.

Edited by TonyRPH on Tuesday 8th September 21:59

[rdjohn]

http://shop.bsigroup.com/ProductDetail/?pid=000000...

I don't think Apple have an App as yet so you will need to use the current design standards. Or employ an Engineer who understands the issues.

[fuzzyyo]

All depends on what was there before and the policy of the local authority. Isnt a case of one rule for all sites