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Dealing with landscape drainage

Dealing with landscape drainage

Drainage of water in landscape may pose problems especially if there is a tendency for runoffs. The question you may be asking is where do I channel the drained water? Even if you construct French drains to drain your lawn, you should know where the water would end up. If it ends up in your neighbors, you might be slapped with a lawsuit. Channeling it to the streets may not be a good idea as you may get find yourself in the wrong side with the authorities in addition to inconveniencing the users. Some of the drainage channeling options is to direct the water to the storm sewers that are already existing. The only problem with this is that you will need permission from the concerned authorities, something that may not be easy to obtain.

Another option is to construct a dry well where the water drains. This consists of a hollow space filled with rocks. The water drains into  the hole percolating through the soil to the ground water. The down side is that it is not suitable for clay soil due to poor drainage capabilities. Ensure that the eventual destination you choose for the drained water is allowed and does not put you in trouble.

 If you are having a problem channeling the water, you can construct dry creeks, and French drains to help you with that. This will ensure that your lawn and landscape does not collect unwanted water. Below is a guide on how you can construct a French drain.

Constructing a French drain

The materials needed are top soil, sand, gravel, landscape fabric, turf, landscaping stones, spray paint and a 6-inch drainpipe. Decide where the water needs rerouting and choose a downward sloping route. It should be a meter away from fences and walls and should not affect the neighbors. Mark the route with a spray paint and then dig a six-inch trench with a shovel. Ensure that its depth is not greater than the foundation nearby. Add a layer of gravel of 3 inches along the bottom of the trench. Line the landscape fabric on top of the gravel at the entire trench. Leave about 10 inches of the fabric on the sides of the trench. Place the drainpipe on top of the landscape fabric and then add the gravel on top to cover the pipe completely.

Leave a space of 5 inches between the gravel top and the surface. Fold the fabric that was left on the sides over the gravel in order to protect the pipe. Using the shovel, fill the trench using sand and then add the top soil. Finally cover them with turf. The trench is now covered with the turf on top. On the open end of the pipe, add stones. Your drainpipe is now complete, and it should drain the excess water from your lawn. For the best results, the trenches should be parallel to the buildings and should run horizontally across the slopes. The drains should slope 6 inches for each 50 feet.

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