Damp floors can not only cause problems when building a house. Stagnant moisture is also undesirable in the garden, on meadows or orchards. Which drainage is appropriate depends on various factors. In some cases a permit is required.
If the garden is flooded during heavy rain, a drainage system is a good solution
pre-planning
Since digging a ditch to drain precipitation affects water rights, most building projects require a permit. You should therefore draw up a precise plan and submit it to your competent authority. Potential contact persons are building authorities or authorities for nature and water protection.
Important Rules
Ditches dug to drain soil must have a gradient of at least 1 percent. It is important that the water flows into a secure soil and that this has a sufficient absorption volume. The ditch system must not have any direct connection to natural water cycles. To prevent the trench from collapsing, it must be supported and secured.
Recommended depths:
- lawn: at least 30 to 50 centimeters
- vegetable garden: about 50 to 80 centimeters
- orchard: around 80 to 150 centimeters
create drainage ditches
Both open and closed drainage systems are possible. If the channels are left open, there is a risk of pollution from leaves and other materials. Close-meshed grilles protect the system from dirt. A gravel bed serves to increase the infiltration area. The width and depth of the ditches can be adjusted to the amount of precipitation. The derivative function can be regulated in this way.
If the aisles are to be closed, pipes or concrete are suitable. The drainage can be laid completely underground, so that there is no aesthetic impairment. The risk of pollution is low. Since the water cannot seep through the walls and floor in this variant, but is only drained away, septic tanks or catch basins are necessary at the end.
Point drainage
If water regularly accumulates in individual areas of the garden, you can drain these puddles with local drainage systems. Drill a hole about 50 centimeters deep in the appropriate places with an earth auger. Line this with fleece and fill it with sand and gravel to just below ground level. The measure is completed with the application of topsoil.