Irrigation Pressure Calculator

Irrigation Pressure Formula

The formula to calculate the irrigation pressure (Pirr) is:

\[ P_{irr} = SP - FP + EP \]

Where:

• \( P_{irr} \) = Irrigation Pressure (psi)
• \( SP \) = Static Pressure (psi)
• \( FP \) = Friction Pressure Loss (psi)
• \( EP \) = Elevation Gain/Loss (psi)

Calculation Example

Suppose you have a static pressure of 50 psi, a friction pressure loss of 10 psi, and an elevation gain of 5 psi. The irrigation pressure would be calculated as:

\[ P_{irr} = 50 - 10 + 5 = 45 \text{ psi} \]

Importance of Irrigation Pressure

Proper irrigation pressure ensures that water is distributed evenly and efficiently across the area being irrigated. Insufficient or excessive pressure can lead to uneven watering, potential crop damage, or water wastage. This calculator helps in determining the optimal pressure for your irrigation system.

Common FAQs

1. What is static pressure?

   • Static pressure is the pressure in the irrigation system when no water is flowing.

2. Why is friction pressure loss important?

   • Friction pressure loss occurs due to the resistance of water flowing through pipes, fittings, and valves, and it must be accounted for to ensure accurate pressure calculations.

3. How does elevation affect irrigation pressure?

   • Elevation gain increases the pressure in the system, while elevation loss decreases it. It's crucial to factor in elevation changes to maintain optimal irrigation pressure.