on . Posted in Fluid Dynamics Tags: Pressure Hydraulic

The hydraulic gradient is a concept used in fluid mechanics and hydrogeology to describe the slope of the water table or piezometric surface in a confined or unconfined aquifer.  It represents the change in the height of the water table per unit of horizontal distance.  The hydraulic gradient is a critical factor in understanding groundwater flow.  It represents the potential energy of the fluid due to its elevation and pressure.

## Hydraulic Gradient Flow Rate fromula

$$\large{ Q = k \; i \; A_c }$$     (Hydraulic Gradient Flow Rate)

$$\large{ Q = \frac{ Q }{ i \; A_c } }$$

$$\large{ Q = \frac{ Q }{ k \; A_c } }$$

$$\large{ Q = \frac{ Q }{ k \; i } }$$

Symbol English Metric
$$\large{ Q }$$ = flow rate $$\large{\frac{ft^3}{sec}}$$ $$\large{\frac{m^3}{s}}$$
$$\large{ k }$$ = hydraulic conductivity $$\large{\frac{ft}{day}}$$ $$\large{\frac{m}{day}}$$
$$\large{ i }$$ = hydraulic gradient $$\large{dimensionless}$$
$$\large{ A_c }$$ = area cross-section of flow $$\large{ in^2 }$$ $$\large{ mm^2 }$$ Tags: Pressure Hydraulic