Water Softener Brine

We have a 4 acre lot and our house sits on top of a hill at an edge of the property. We have a very hard water from the water well, and a water softener that sits right next to the house. Now, the brine comes out and runs down the slope throughout the property. I'm thinking of building a sort of a trench for it and make it nice with cement and rocks to line the bottom. But there must be a better way! Now, I'm a newb when it comes to permaculture, but are there any solutions to the brine problem? I don't like how it runs down the slope and essentially makes the land downstream unusable for food growing I'm planning in the future.

Evaporation pond?
Better still, a solar still!
A long,shallow,plastic lined,level bottomed trench filled with blackened stones.
A low wall of cement blocks, painted white,running along the northside of the pond, a few inches from the edge.
Clear plastic weighed down on the other side,streatched over the trench to the top of white wall.
Evaporation from the trench either hits the plastic glazing and slides down, or hits the (relatively) cool white wall.
Fill the cement blocks with soil and plants.
Plant something like strawberries along the other side.
It could work year round.
Fill the trench with charcoal instead of black stones.
Collect the salted charcoal, use it in pottery production.

That's a great idea! Thanks!