On: “Sand Dams” Are Transforming African Drylands

[specialist]

It's good to ask these questions. As others linked below, there are orgs working this strategy. We can ask them, look at their results.

Sand dams may very well improve downstream conditions. Because anything that holds, slows down the surface water is a good thing.

I'm reminded of a widespread mitigation project where simply removing non-native plants and replanting native trees restored water ways.

These man made oases may do the same.

Think of them as beaver dams, without the beavers.