Start / Water and irrigation / Irrigation management and depth
Enter the depth in millimeters, the area, and the spacing to see the water volume in L/m², m³ per hectare, m³ over the area, and liters per plant.
Pre-sizing and estimating tool: the results do not replace a design, calculation, or report signed by a qualified professional, nor verification against the applicable standards.
Technical responsibility. This calculator is under verification. The reference values and examples are hypothetical, to illustrate the calculation, and are not technical references. The user is responsible for the data entered, the choice of parameters, and the use of the results, and must validate them with a qualified professional before any decision, purchase, application, or construction work.
Total volume over the area for depths of 5 to 30 mm; the highlighted bar is your depth, when it falls in that range.
Drag the controls to simulate data different from what you entered (from 30% less to 30% more) and watch the result change instantly.
Water volume for depths of 5 to 30 mm, with the area and spacings entered. The highlighted row is your depth, when it falls in that range.
The calculation done in steps, with the values you entered.
The calculation memo gathers this page's inputs, results, equations, assumptions, and references, with fields for project, responsible person, and review. The full report also includes the charts and interpretations, in color. In the print window, choose Save as PDF.
Enter the depth in millimeters, the irrigated area, and the spacings between plants and between rows. The calculator shows the depth in L/m², the volume per hectare, the total volume of the area, and the water each plant receives.
Depth of 10 mm over 20 ha, with plants 0.5 m apart and rows 3 m apart.
10 mm = 10 L/m² = 100 m³/ha. On the area, it is 100 × 20 = 2,000 m³. Each plant takes up 0.5 × 3 = 1.5 m², so it gets 10 × 1.5 = 15 litres.
| Depth | L/m² | m³/ha |
|---|---|---|
| 5 mm | 5 | 50 |
| 10 mm | 10 | 100 |
| 20 mm | 20 | 200 |
| 25.4 mm (1 inch) | 25.4 | 254 |
For the flow the system must deliver, use the flow required for irrigation. For the depth per shift, use the irrigation interval.
1 mm equals 1 litre per square metre, or 10 m³ per hectare. It is the height of water that would cover the land if nothing ran off or soaked in.
Multiply the depth in mm by the area the plant occupies, in m². The result comes out in liters per plant.
Yes, in water volume, as long as it is effective. Subtracting rain from the interval is a management decision, not a unit conversion.
Because water permits and water tariffs are usually in m³. Converting the depth is the first step to estimating the annual volume withdrawn.
Important notice: the Agrocalcs tools make estimates and preliminary sizing based on the data entered and on published engineering methods. They do not replace a design, a calculation report or a report signed by a qualified professional (CREA/ART), nor verification against the applicable technical standards and legislation, such as the Regulatory Standards of the Ministry of Labor. Material and fuel properties vary: check with the manufacturer or with analyses of your process before deciding. By using the site, you agree to the Terms of Use.
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