ABSTRACT
An alternative way to compute the drainable porosity from measurements of drain discharge rates (q) and height of water table above drain axis (h) is presented and discussed. The drainable porosity was computed from measurements of field obtained by Queiroz (1987) and data obtained at experimental drainage field of the ESALQ/USP. The proposed procedure can be used to estimate the drainable porosity, with accuracy and relative facility, in substitution to the graphic procedure used in the drainage literature, to transient conditions.
Key words:
drainable porosity; drain discharge rates; drainage