ᐅ Irrigation with a well – too much for an area of about 650 m²

Created on: 19 Mar 2022 12:38
A
ArthHaus
Hello everyone,

First of all, I want to apologize for not sharing the house building process with you in my other thread. Time flew by incredibly fast, and we moved in already in October 2021. So far, the construction went smoothly, and we now want to start working on the garden in May. Specifically, it’s about irrigation using a well. I have read other threads and I’m completely overwhelmed trying to figure out if the pump we had installed is even sufficient for our property, and if so, how we should plan the system.

Can you help me get started with the planning? This is the current situation:

Groundwater at around 2 m (6.5 feet). Drilled well about 7 m (23 feet) deep.
The installed pump is:
iWater eco3 4-60 62 m (203 feet), 3.6 m³/h (includes pressure switch, dry-run protection etc.)
Connected with PE pipe, 32 x 3.0 mm (1.25 x 0.12 inches)

I’ve attached a drawing of the current installation. The plan is also to use the well water for 2 toilets, the washing machine, and 2 outdoor water outlets. The installation can be expanded inside the garage if needed. Attached is also a site plan, with the paved areas marked in gray and the planting beds in green. The backyard will initially be fully lawn for the next few years.

As a complete beginner, I thought I’d simply take the 35 mm (1.38 inch) pipe and put enough rotators on it to cover the entire area. Now, after reading other threads, I’m struggling to imagine how we can do this with the current pump capacity. The initial plan with one zone (as intended) would require a total of 11.83 m³/h, but my pump can only deliver 3.6 m³/h. If I understand correctly, I’d have to split it into 3 zones, right?

These are the rotators I’ve planned so far. This leaves some gaps in the middle — is it acceptable to leave these and hope the water reaches there somehow?

11 x MP 3500 (10 m (33 feet) radius, 180°) 8.22 m³/h
4 x MP 3000 (9.1 m (30 feet) radius, 360°) 3.30 m³/h
6 x MP 800 SR (3 m (10 feet) radius, 180°) 0.31 m³/h

As soon as I need multiple zones, the pipe entry probably won’t be sufficient anymore. I’ll have to try to get 4 x 35 mm (1.38 inch) pipes through the KG pipe. Mathematically that should work… Otherwise, the zone distribution would have to be moved outside. But I’d prefer to keep everything inside the garage.

I hope you can point me in the right direction.

Thank you!

Lageplan: Grüner Innenbereich mit Kreisflächen, Gebäude rechts unten, Brunnen links.


Diagramm: Blauer Rahmen links, Verbindung zur rechten Box; gelbe, grüne und orange Linien.
rick201821 Mar 2022 13:32
There are also drip irrigation systems with fleece. These are installed under the lawn. However, they are quite expensive, and you can’t just dig a hole easily...

Depending on the plant, the appropriate irrigation method should be chosen (sprinkling, drip, root irrigation, etc.).

With sensible planting, you can save a significant amount of water. For longer dry periods, irrigation is very useful because it prevents expensive plants from dying.

We only use rainwater collected in our 76m³ (20080 gallons) cistern. We could also pump water from the spring if needed.

It’s important not to overwater either. Plants get used to it and don’t develop deep roots. Overwatering can also lead to fungal diseases and pest infestations.