Weenat App
The Available Water Reservoir
What if you could tell, at a glance, how much water your plants actually have available in the soil?
With the Available Water Reservoir, Weenat converts your sensor data into a simple, easy-to-read and operational piece of information: the amount of water available for your crops, expressed in millimetres.
Crops and soil types
The Available Water Reservoir is compatible with all irrigated crops and all soil types.
Available in the Weenat app
For any plot equipped with Weenat Tensiometers.
What is the Available Water Reservoir?
Irrigation is, above all, a matter of common sense: applying the right amount of water at the right time.
But with the kPa readings from Tensiometers, interpreting the data can quickly become confusing, especially for those just starting out with irrigation management.
That is why Weenat developed the Available Water Reservoir: a key irrigation management feature that converts your sensor data in real time into millimetres of available water in your soil.
In practice?
➡️ Your sensors measure soil moisture at the depth where they are installed.
➡️ Our model automatically characterises the water behaviour of your plot (field capacity, wilting point, water retention capacity) with no configuration required. You can of course refine the model by entering your soil texture.
➡️ Your sensor readings are converted into mm of water available for your plants, across the full depth covered by your sensors.
You therefore obtain an estimate of your soil water content in mm, directly comparable to upcoming rainfall and evapotranspiration, allowing you to size your irrigation doses by simple addition.
Immediate readout. No calculation. No guesswork.
How does the Available Water Reservoir work?
1. Your sensors measure soil water
Tensiometers measure the binding force between water and soil (in kPa). As the soil dries out, this force increases: the plant has to work harder to extract water.
But one question remains for the grower: is there enough water left in the soil for my crop?
2. Our soil model converts the reading into mm
This is where the Available Water Reservoir changes the game.
Using your sensor data and our technology, we calculate in real time the amount of usable water in your plot’s reservoir based on your soil texture.
3. You track your Readily Available Water all season long
The Available Water Reservoir is displayed in the Weenat app as a clear graph that updates day by day:
- 🔵 Full reservoir: your soil is at full capacity. Your plants have everything they need, no need to start irrigating. Take advantage of winter recharge!
- 🟦 Readily Water Tank: the reserve is gradually decreasing. You can monitor the trend.
- 🔴 Survival Tank: the threshold below which irrigation should be considered to avoid water stress.
Rainfall and irrigations also appear on the graph, so you can immediately see the impact of each water input on the reserve. You can also activate the ETP (evapotranspiration) widget to plan ahead.
4. An instant overview of all your plots
From the My Farm screen, you can see at a glance the reservoir level of all your irrigated and equipped plots.
Each plot displays its gauge in mm, using the same colour coding as the graph.
You can immediately identify where to irrigate first and where you can wait.
Available Water Reservoir + sensor data = a complementary view
The Available Water Reservoir does not replace tensiometry or volumetric moisture curves: it complements them.
You retain access to all field measurements from your sensors, at each installation depth.
In the Weenat app, you can therefore combine two levels of reading:
The operational view from soil moisture sensors
In kPa for Tensiometers, this is the raw field-measured data that tells you about the water dynamics in your soil at each depth.
The reservoir view in millimetres
Which contextualises this reading against your soil texture and your plot’s water retention capacity.
The same 50 kPa value does not reflect the same reality in a sandy soil as in a silty soil: the reservoir view integrates this difference to give you directly actionable information.
A question about the Available Water Reservoir?
Do you have a question about the Available Water Reservoir, or are you unsure whether this tool is right for you?
Our experts are ready to help.
Who is the Available Water Reservoir designed for?
For irrigators new to sensors
The Available Water Reservoir gives you the information you need directly: how many mm of water remain in your soil, at the depth of your sensors. No need to understand technical units. You can get started immediately.
For experienced irrigators
Already managing your irrigation with Tensiometers?
The Available Water Reservoir gives you a complementary perspective alongside your existing curves. You combine water availability (kPa or %) with the actual amount of water available (mm), factual, field-based data that aligns with the agronomic concepts you already know.
For irrigation technicians and advisors
The Available Water Reservoir simplifies the advisory process. You can compare multiple plots, crops and soil types at a glance, and base your recommendations on a shared, easy-to-read metric: mm of available water.
The Weenat technology behind the Reservoir
Our technology draws on 4 years of R&D and a network of pilot farms across the territory, covering all major French and European soil types.
On these farms, our teams collected thousands of samples that were characterised in the laboratory.
The principle:
Saturating thousands of samples with water
Then continuously tracking water loss while measuring hydric potential with a tensiometer.
Defining the upper limit of the Available Water Reservoir
At pF 2 (approximately 10 kPa), corresponding to field capacity: the maximum amount of water the soil can retain before excess water percolates downward.
Defining the lower limit of the Available Water Reservoir
At pF 4.2, corresponding to the permanent wilting point: the threshold below which the plant can no longer extract water from the soil.
Sensor-to-mm translation model
We thus calculated a water retention coefficient expressed in millimetres of water per centimetre of soil. This coefficient is what enables the model to convert in real time the kPa readings from your Tensiometers into millimetres of available water, at the exact depth where your sensors are installed.
Today, the model covers all texture classes used in agronomy: from sands to clays, including silts.
How do I activate the Available Water Reservoir on my plots?
Activating the Available Water Reservoir is straightforward ⤵️
- Download the Weenat app.
- Create your Weenat Expert account.
- Connect your irrigation management sensors (Tensiometers) to your plots.
- Add the Available Water Reservoir widget in your Irrigation environment.
That’s it!
