Need Drainage Help!
I live in Southeast Louisiana where we get about 60 inches of rain a year, the terrain is very flat, and the soil is heavy and has a lot of clay.
I live in a neighborhood on a relatively small lot. I think it is about 50 x 120. There is a large drainage ditch that runs on either side of the street in the front yard. The house was built up on sandy fill so there is a slight slope from the house to the ditch in the front. The front yard is fine. There was a slight dip between my house and the neighbors that caused pooling. A couple years ago I dug a trench and put in an underground plastic pipe with 2 drains about 10 feet apart that runs out to the ditch. This works great (when the drain isn't clogged by debris) and will drain the area within minutes). Otherwise the front yard is not a problem and stays dry.
The issue is the backyard. It is lower than the front, and water gets trapped back there because it can't clear the raised area where the house is to get to the front yard and ultimately to the ditch. This seems to be a problem with the neighbors as well. I know the people on either side of me have the same issue. What I would like to do is to tie into the drain I built in the front yard so that I can get the water out of the back yard into the ditch along the street as well.
Once I get the trench into the back yard, i want to spilt off into 2 lines - 1 to go along the back fence and another to the low spot nearer the house - which are my 2 lowest spots. I will put drains at the terminus of these 2 lines. My main question is whether or not to go with a french drain with perforated pipe or to go with solid pipe?
In the last 2 weeks we have gotten 2 downpours of probably 3 or more inches on each occassion that flooded streets in town. The ground has not really dried out from the winter yet. I dug a couple of holes and noticed they filled up with water. I removed the water 3 times and they still filled up. I don't know if the closed drain would do anything to help with that subsurface water and might only address the standing water on the surface. I would like to dry out the whole backyard and wonder if the perforated french drain would better accomplish that goal?
What things do I need to consider when deciding whether to go with closed or perforated piping?