Rate of drainage
Rate of drainage is a term used in land drainage, i.e. dewatering through an underground pipe system. The rate of drainage gives the flow rate per unit area of land to be drained; e.g. for polders (dyked land), the rate of drainage amounts to approximately 0.7 to 0.8 l / s and hectare (10,000 m2).
Maximum values are approximately 2 l/s ha.
