If Q is the discharge through a rectangular notch and H is the head over the rectangular notch, then the relative error in discharge due to the error in measurement of head over the rectangular notch is given by:

In open channel flow measurement, a current meter is primarily used to measure the:

Dupuit's equation for an equivalent pipe is used to:

For flow through soil having permeability k under a total head of H, if the shape factor of the flow net is 0.5, what is the discharge (seepage) through the soil?