Our Drainage systems are constructed to ensure that waste water and sewage is transported neatly to disposal points, thereby keeping the environment well drained and free of waste. The following examples make up a good drainage system; drainage pipes, closed ditches having pipe drains, channels and conduits.In comparison, an 'infiltration basin' is a dry basin designed to promote infiltration of surface water into the ground. If vegetated, a small 'infiltration basin' is often referred to as a 'dry pond'. Conventional stormwater and urban drainage systems are designed to dispose off rainfall runoff as quickly as possible.