Matthieu Du Manoir

Seems like a great read!

FYI I saw there is a German version by Ian, maybe it can help some of us...

Matthieu

Oh, absolutely, thanks for clarifying - I got it wrong the first time.

This makes much more sense now, with some imagination I can see the rain moving perpendicular to contour lines to go and gather on those points.

With a more detailed view of the property, here are some keypoints (I think).

Hey guys!

I'd like to buy some land in France (Normandy!), and do some keyline design in it to benefit from the water flow optimally and regenerate a piece of land (5ha = 12 acres).
It would look a bit like that https://i.ytimg.com/vi/PJdnEtMLtHI/maxresdefault.jpg (I've been mostly inspired by Richard Perkins work in Sweden).

My terrain would have a ~10% slope downhill.

However, it seems my whole terrain is uphill from the main keypoint: the keypoint does not belong to my terrain, but is a bit downhill (you can see two views of the property in the attached file to check if I'm correct).

What would you do in this context?

Use the keypoint from the neighbouring terrain and work uphill?
Something else?

Thanks for reading me!

Matthieu.