There is a gulley in the horse pasture that gets deeper as it crosses the pipeline and during rainy season, seeps keep the water running as it exits our property. There is a slope, nothing like your mountains, but enough to erode. The sand is loose and it washes.
My husband is going to drag the front end loader on the ground to push the mulch away. We will do this in strips. The mulch will help to trap soil and keep it from washing away. The bare dirt will be for seeding pasture. This fall I plan on Crimson clover and white ball clover and rye grass. In the spring, I will plant giant Bermuda. I can't do it all at once, but I also plan on planting forage plantain, chicory and brome. My sheep LOVE chicory and will eat it down to a stump. Except the Bermuda, these are all cool season grasses, I need to plant more hot weather grasses. I figure on a good 2 years to get what I want established. I want to make a diverse pasture. I may even plant giant ragweed and lambs quarters, since the sheep love them so much. There is a weed here called Poor Joe that the horses and sheep will eat. It has a long taproot and I figure that it draws up nutrients they want. I have crab grass, but it dies back in the dry and heat. There is a little bahia here, but I want another summer grass too.
I have an invasive weed, sida rhombifolia. the sheep love it and will strip the leaves off. It is said to be toxic for goats. It is also a medicinal herb. I have eaten the leaves off the plant, not too bad.
https://earthmedicineinstitute.com/more/library/medicinal-plants/sida-rhombifolia/
This is the gulley where it exits our property.
Since there never is a rush of running water, we used bags of concrete to make a water gap, leaving spaces between the top 2 layers of bags. The paper has long since rotted off, but the concrete is still doing it's job.
@Beekissed this is just for you. LOL