A number of drainage methods are available. Depending on the nature of the soil and its water retention quality, appropriate drainage method can be adopted.
Different drainage methods are
Interlocking land drains: Interlocking land drains slope down, carry excess water away towards a ditch or other outfall. One main pipe made of either perforated plastic or of terracotta is fed by narrower lateral pipes that run into it at angles of approximately 450, making an alternating or herribone pattern. The intervals between the lateral pipes are governed by the amount of drainage required. They will be more closely spaced if there is a lot of water to be carried away. The depth of the pipe depends on many factors like natural ground fall, local water table and soil type.
The Pipe System: The pipe system consists of a clay or plastic pipe at the bottom of a fairly narrow trench which is filled with gravel.
The Brushwood Method: The brushwood method keeps the simple trench clear of stones and debris with a thick layer of willow or hazel brushwood.
The Rubble Method: The rubble method is a simple trench filled with coarse stone or hard rubble grained from larger at the bottom to smaller toward the top.
Slop Paving: Sloped paving from the house wall toward the lawn is a simple drainage method. To prevent water from collecting along the lower edge of the paving, there should be gravel drain concealed by a covering of rod running between the lawn and the paving.
Soak way: A soak way is a cavity under the surface filled with free – draining material. This has a concrete block or brick wall with many of the joints left open. The soak way is filled with graded stones with the smaller ones forward the surface. A narrow opening filled with gravel serves as a surface drain and underground pipes can also be used to direct water away from the surrounding soil to a soak away.
Participants