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Episode notes
How French Drains Redirect Subterranean Water
Keywords
FrenchHenryInsteadFluid DynamicsTreasury SecretaryFarm DrainageFlaggSoaker HoseWeeping TileEighth InchHydrostatic PressurePerforated PipeInch GapRoofing TilesSubterranean HighwayReverse SoakerCurtain DrainSurface Runoff