Graham W wrote:
pat wrote:

I am a beginner with a small orchard in a very dry and warm part of
France. The water supply is about 70 m away in a stream and 7 meters
lower.

I need advice on pumps, diesel I understand would be better as there
is no electricity supply anywhere near the orchard? Can pump head
mean two things, the depth from which the pump can pump, and the
distance it can supply? How much could I expect to pay for a pump?
I also would need to be able to either carry it, or load it into the
back of a van...


Hello Pat,

I don't have any direct experience with these but I do know a bit about
the physics!

When you think about it, you can't suck water up out of a hole to a height
of greater than 30 feet. That is because it is the air pressure which
pushes
the water up into the pump inlet and thence to the outlet. So the pump
needs to be located at the stream end. It would be best to arrange it so
that it will be easy to prime (fill the pump with water before starting
the
motor) to get the flow of water started.

You haven't said how much water volume you need so it will be difficult
to advise you about internal combustion engine driven or electric. I know
you said that there is no electricity near but those Honda (and others)
petrol-electric generator sets are affordable these days.

HTH
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Thank you Graham.
So publ blurb that says a pump has a head of 7 m, that means the hight
difference between the surface of the water and the pump is max 7
meters? I have 10 fruit trees for the moment, and will possibly grow
small amount vegetables if I can sort out water supply, so I cant
imagine that I would need huge amounts o water, A thorough watering
once a week for the trees would be enough.
Pat