Methods to Drain Surface Water
Methods to Drain Surface Water
(OP)
A current project I'm working on is creating a bus facility over an existing open lot.
Right now, the lot is bare soil and so runoff drainage occurs throughout. With the proposed design, about 85% of the lot will be covered in asphalt or building increasing the amount of surface runoff.
A soils report found that the groundwater table ranges from 5 to 8 feet below the surface.
I planned to have 8ft drywells but now with the GWT at that depth, does not sound like a good idea.
What are other ways I could consider to help decrease the amount of surface runoff?
Right now, the lot is bare soil and so runoff drainage occurs throughout. With the proposed design, about 85% of the lot will be covered in asphalt or building increasing the amount of surface runoff.
A soils report found that the groundwater table ranges from 5 to 8 feet below the surface.
I planned to have 8ft drywells but now with the GWT at that depth, does not sound like a good idea.
What are other ways I could consider to help decrease the amount of surface runoff?





RE: Methods to Drain Surface Water
Since you have 85 percent developed area, you'll have to work a bit harder to balance the remaining area with retention/detention. Many authorities will limit impervious development to 70 or 75 percent of the site.
You might also look at state roads nearby and their retention facilities...they will often take part of your runoff if you ask.
With 5 to 8 feet above the water table, you have plenty of depth for ponds, assuming you have adequate surface area.