Pick drainage system based on soil type in area

The first step in land drainage is an investigation into the causes of poor drainage.

Knowledge of local drainage schemes, and their effectiveness, will provide insight.

Test pits of at least 2.5 metres deep should be excavated. Soil type should be established and the rate and depth of water seepage into the test pits recorded. Visible cracking, areas of looser soil, and rooting depth can convey important information regarding the drainage status of the layers.