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...draining rain water into #aquifers, but I can't find it anymore for the time being.

However, I found an up-to-date-article here, which focuses more on the #WaterManagement than on the construction aspects:

"Over the past decade, #Dahlke’s experiments with submerging small plots have suggested 👉intentional #flooding can replenish aquifers without damaging either #groundwater quality or crops"👈

It is based on a law enacted in 2014:

"#California adopted a landmark law,...