---
title: "Water Efficiency Data"
canonical: "https://networkconnect.docs.rubiconwater.com/space/NC/2661843009/Water%20Efficiency%20Data"
format: markdown
---
This is the data displayed in the Water Efficiency graph or table:

|  |  |  |  |
| --- | --- | --- | --- |
| **Parameter** | **Purpose** | **Calculation** | **Example** |
| Irrigation Date | Date (or date range, such as week) for which the efficiency data applies. |  |  |
| Plantings | Plantings configured for the irrigation unit. If more than one planting was configured for the date range then all plantings are listed. |  |  |
| Irrigated Area | Total area of land that is irrigated, typically measured in hectares or acres |  | If a farm irrigates 2 hectares of land, that represents the irrigation area applied.<br>1 Hectares= 10,000 m³  
2 Hectares= 20,000 m³ |
| Irrigated Volume | Total amount of water used for irrigation over a specific period by all outlets for a water account.<br>Irrigated Volume is calculated from metered usage where available or from estimated usage if metered usage is not available. | Irrigated Volume=Volume of Outlet 1+Volume of Outlet 2+…+Volume of Outlet N | Outlet 1 volume: 150 m³  
Outlet 2 volume: 200 m³  
Outlet 3 volume: 100 m³<br>Irrigated Volume = 450m³ |
| Ordered Volume |  |  |  |
| Metered Volume |  |  |  |
| Irrigated Depth | Depth of water used for irrigation assuming it was applied evenly over the irrigated land area. | Irrigated Depth (mm)=   
 Water Used in a Day (m³) / Area Being Irrigated (hectares)×10  
​ | Water Used in a day : 450 m³   
Area Being Irrigated : 2 Hectares = 20, 000 m³  
Irrigated Depth in mm = 450 / 2 * 10  = 22.5 mm |
| RainFall | Rainfall refers to the total precipitation received over a specified period, measured in millimeters (mm). |  |  |
| ETo ( Reference Evapotranspiration ) | Estimated rate of water loss from a reference surface due to both evaporation and transpiration. |  | If ETo for a specific area is calculated to be 15 mm per day, it means that, under average conditions, 15 millimeters of water would need to be applied to the reference surface to replace the water lost. |
| Kc ( Crop Coefficient ) | The crop coefficient, or Kc, adjusts the reference evapotranspiration (ETo) to reflect the actual water use of a specific crop at a specific growth stage. |  |  |
| ETc  ( Water Requirement /Crop Evapotranspiration) | Crop specific water loss from evapotranspiration. | ETc=ETo×Kc | If the ETo is 15 mm for a day and the Kc for a crop at that growth stage is 0.9 then ETc would be<br>ETc = 15 mm * 0.9 = 13.5 mm<br>This means the crop needs 13.5 mm of water for its growth daily. |
| Raw (Readily available water) | This is the amount of water in the soil that is easily accessible to plants for their growth and transpiration | RAW=Field Capacity−Wilting Point<br>- Wilting Point - the moisture level in the soil at which plants can no longer extract enough water.
- Field Capacity - the amount of water held in soil after excess water has drained away |  |
| Irrigation Requirement | The amount of water a crop still needs after taking into account any rain that has fallen | Irrigation Requirement = ETc - Rainfall | ETc for the day: 13.5 mm (the total water needed for the crop).  
Rainfall: 10 mm (the amount of rain that fell that day).<br>Irrigation Requirement = 13.5mm−10mm=3.5 mm |
| Water Balance | Water status in a system for the specified measurement unit (day, week, month). | Water Balance=Irrigation Applied+Rainfall−Etc | (For a day)<br>Irrigation Applied = 22.5 mm   
RainFall = 15 mm  
ETc = 4.5 mm<br>Water balance =22.5 + 15 - 4.5  = 33 mm |
| Cumulative Water Balance | Cumulative water balance over the reporting period. |  |  |