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tekalon t1_iy8v99c wrote

Usually runoff to a nearby river, taking a lot of soil nutrients with it.

Many engineers know about it, the 'problem' is that it takes a lot of time, unused land and man/machine labor to build. If OP and I watched the same documentary, it took a whole village months to build these wadis in areas that weren't being used. Other places that similar techniques are being used on private land for those that are willing to spend the time to experiment based on the needs of that area.

In the US there are beaver relocation programs - beavers don't build wadis but they do build reservoirs and wetlands that give the same result. Same downsides. Beavers can build in areas that can cause flooding and damage to other infrastructure. Identifying areas that would benefit having beavers building dams and the relocation process take time, effort, coordination and money to complete.

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BafangFan t1_iy8zl5q wrote

This one guy in Arizona is doing a pretty good job for his neighborhood. Everyone could do a little something themselves and it would make a big difference

https://youtu.be/KcAMXm9zITg

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GonWithTheNen t1_iyakezv wrote

When I visited the video I thought, "Oh, 52 minutes? I'll just watch a bit." But here I am an hour later after watching the whole thing. :p

Brad and his brother began something brilliant, and it's a joy to see that Brad is still going at it - still with the same infectious joy and energy! It's amazing seeing how lush Dunbar Spring has become.

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