Where Vp is the total volume of water collected in the catch can at the time of ponding (mm3), tp the time to ponding (h) and A is the area of the catch cans (mm2). The measured pairs of time to ponding and respective infiltration rate were used to determine the parameters of infiltration equation. The Kostiakov equation (Kostiakov, 1932), describes infiltration rate i as a function of time t using a simple power function: