The image above represents pressure head.

To compute for pressure head, three essential parameters are needed and these parameters are **Pressure (P), Density (ρ) **and **Acceleration due to Gravity (g).**

The formula for calculating pressure head:

h_{p} = ^{P} / _{ρg}

Where:

h_{p} = Pressure Head

P = Pressure

p = Density

g = Acceleration due to Gravity

Let’s solve an example;

Find the pressure head when the pressure is 18, the density is 14 and the acceleration due to gravity is 9.

This implies that;

P = Pressure = 18

p = Density = 14

g = Acceleration due to Gravity = 9

h_{p} = ^{P} / _{ρg}

h_{p} = ^{18} / _{(14)(9)}

h_{p} = ^{18} / _{126}

h_{p} = 0.142

Therefore, the **pressure head **is **0.142.**

**Calculating the Pressure when the Pressure Head, the Density and the Acceleration due to Gravity is Given.**

P = h_{p} x pg

Where;

P = Pressure

h_{p} = Pressure Head

p = Density

g = Acceleration due to Gravity

Let’s solve an example;

Find the pressure when the pressure head is 25, the density is 6 and the acceleration due to gravity is 9.

This implies that;

h_{p} = Pressure Head = 25

p = Density = 6

g = Acceleration due to Gravity = 9

P = h_{p} x pg

P = 25 x (6)(9)

P = 25 x 54

P = 1350

Therefore, the **pressure **is **1350.**

Continue reading How to Calculate and Solve for Pressure Head | Aquifer Characteristics