Use Arduino to estimate current status from previous learning

Using Arduino Project Guidance
1

I have a arduino nano esp32 connected to a flow meter in order to check the water flowing in my house plant.
I would like to make Arduino record the usual quantity of water I use during the day and to understand if there is any possible leakage.
For example, if I usually use 5 liters of water in the morning and 10 liters during the evening, it should send me an alarm if it detects 8 liters of water during the morning.
I was thinking about a kalman filter, but i do not think it should be useful in this case.

I would like to make Arduino learns my usual habits and then make some a guess about the current situation.

How can I implement this?

Thank you

2

If you can work out the statistics of the problem, we could help translate it to code.

3

At its simplest, maintain an average of morning volume and evening volume every day, by incrementing the total number of daily observations, and performing a simple division. Your tests can then be made against those averages. For example testing if today’s exceeds a specified percentage.

4

On hackster there is an interesting idea for identifying/measuring power consumptions