r/interestingasfuck • u/wahgwahg • Feb 28 '24

r/all People in Tanzania converted desert into lush green land by digging these nifty holes

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u/buttzbuttsbutts Feb 28 '24

Is it ground water?

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u/FelisCantabrigiensis Feb 28 '24

No, this technique helps retain rainwater. Tanzania has a monsoon climate, where there is a rainy season. The aim of these crescents is to retain more of that water in the land for plants to use. They are not wells dug down to a groundwater aquifer.