porch - All Forums - SWMM 5 or SWMM or EPASWMM and SWMM5 in ICM_SWMM2024-03-28T20:56:38Zhttps://swmm2000.com/forum/topics/feed/tag/porchSidewalk-porch drainage principleshttps://swmm2000.com/forum/topics/sidewalk-porch-drainage-principles2016-08-28T07:45:06.000Z2016-08-28T07:45:06.000ZBernard Dankohttps://swmm2000.com/members/BernardDanko<div><p>Hello,<br/>Please forgive me for my bad English.<br/><br/>I am wondering if somebody could help me with one particular issue that has been puzzling me for some time.<br/>I started reading the NDS <a rel="nofollow" href="http://www.ndspro.com/media/wysiwyg/files/principles-of-exterior-drainage.pdf" target="_blank">Principles of Exterior Drainage</a> publication. On <span lang="en" xml:lang="en"><a rel="nofollow" href="http://www.ndspro.com/media/wysiwyg/files/principles-of-exterior-drainage.pdf#page=57" target="_blank">page 55</a> of that publication</span> they solved the impervious surface drainage of the sidewalk in front of the house and the cement porch behind the house, by simply angling them towards the lawn:</p><p><a target="_self" href="http://storage.ning.com/topology/rest/1.0/file/get/3284346198?profile=original"><img width="300" class="align-full" src="http://storage.ning.com/topology/rest/1.0/file/get/3284346198?profile=RESIZE_320x320" width="300"/></a><br/>Why is this so? Is this the correct approach in solving the impervious surface drainage of the sidewalk and the porch? Or should both of them have a catch basin in the middle of them?<br/>What confuses me is this principle of simply angling them (the sidewalk and the porch) towards the lawn. Is this a good approach or not?<br/><br/>I would be very grateful for any kind of reply.</p><p>I apologize if this question is at the moment not directly related with SWMM. I tried contacting the NDS but never got any kind of reply.<br/>Thank you in advance.</p><p>Regards,<br/>Bernard</p></div>