Flow Velocity and Groundwater Age

The term flow velocity sounds simple the distance the water moves in a unit of time. In this sense it is also handled by Darcy s experiment  

In the experiment the water flows in a tube in which the water enters in one end, flows along the tube, and leaves at the other end. The impermeable 

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The term groundwater age sounds simple as well the time that has passed since a water parcel was recharged into the saturated water system. Or, in terms of travel time, the time that has passed since the water entered the ground until it reaches the point at which it is observed, for example, at a spring or a well. In a simplistic way one could compute the age of water (/) in Darcy s experiment by dividing the length of the flow path (Al) by the measured flow velocity (V)  

we have to remember that the above equation holds true for the onedimensional setup of flow through a vertical tube. 

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