How drip irrigation feeds each plant

Drip irrigation sends filtered water at low pressure through a mainline into thin plastic laterals that run along each crop row. Small emitters built into the laterals release a few liters per hour right at the root zone, so little water is lost to wind, runoff or wetting the bare space between rows.

Controls

Labels

Animation speed

Emitter flow

Emitter spacing

Row (lateral) spacing

Step through it

Filter and regulatorEmitter passages are tiny, so water is filtered first. A regulator drops the pressure to the low level drip lines are built for.
MainlineA larger pipe carries water across the head of the field and feeds every row.
Laterals and emittersThin laterals run down each row. Emitters spaced along them each pass a set flow, often 1 to 4 liters per hour.
Wetting the root zoneWater spreads out from each emitter into a wet bulb in the soil. With close spacing the bulbs merge into a continuous wet strip under the row.
Wider rows, slower rateSpread the laterals to 2 meters and the same emitters cover twice the area, so the field receives half the millimeters per hour.

Application rate

Each emitter serves a rectangle of field: emitter spacing along the row times the spacing between laterals. Divide the emitter flow by that area and you get the application rate. Liters per square meter equals millimeters, so rate (mm/h) = emitter flow (L/h) / (emitter spacing (m) x row spacing (m)).

This is the area-average rate across the whole field. Right under the row the soil gets much wetter than the middle of the alley, which is the point of drip: water goes where the roots are.

Try it: leave the emitter flow at 1.6 L/h and slide the emitter spacing from 20 to 60 cm. The rate falls from 8 to under 3 mm/h, and the hours needed to apply 25 mm roughly triple.

Why low and slow works

Low rates let water soak in instead of running off, even on clay or slopes. The tradeoff is time: drip systems often run for hours, or daily in short pulses, to keep the root zone near its ideal moisture.

Where Avid uses this

Avid's VerdantaIQ precision agriculture AI focuses on getting water to the root zone efficiently, and in a session co-presented at IBM TechXchange 2026 it showed a documented 58 percent water reduction.

Sources

Drip Irrigation SystemsOklahoma State University Extension
Drip Line Rate CalculatorWashington State University Irrigation in the Pacific Northwest
A Review of Drip Irrigation's Effect on Water, Carbon Fluxes, and Crop Growth in FarmlandWater (MDPI, open access)

How to cite this model

Avid Solutions International. (2026, November 11). How drip irrigation feeds each plant [Interactive 3D model]. Avid Field Lab. https://avidsolutionsintl.com/explore/drip-irrigation

Last updated November 11, 2026

Keep exploring

Water & IrrigationInside a centrifugal irrigation pump Water & IrrigationHow an Archimedes screw lifts water Water & IrrigationHow a center pivot waters a circle Water & IrrigationHow an impact sprinkler ticks around