Stormwater Runoff

[eng2424]

For a site I'm designing, the stormwater runoff runs offsite into an existing creek. There is also an existing low spot where part of the site currently is graded to. How should I take this low spot into account for stormwater management? For my runoff calcs, should I just disregard the watershed area running to the low spot since it is not going offsite? The post-developement will not change this low spot or the watershed going to it, so another reason why to diregard it?
I may also need a detention pond on the site, this low spot would be a good place for it?

thanks in advance for any help

 

[dicksewerrat]

I'd devlope the 'low spot' for detention and maybe holding water. Since it will remain, use it to the greatest advantage.