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History
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High-density polyethylene pipe installation in a storm drain project, Mexico.
High-density polyethylene pipe installation in a storm drain project, Mexico.
Remains of a drain at Lothal circa 3000 BC
Remains of a drain at Lothal circa 3000 BC
Tank Stream, a historical drain in the City of Sydney, Australia
Tank Stream, a historical drain in the City of Sydney, Australia
An agricultural drainage channel outside Magome, Japan after a heavy rain. Protuberances create turbulent water, preventing sediment from settling in
An agricultural drainage channel outside Magome, Japan after a heavy rain. Protuberances create turbulent water, preventing sediment from settling in the channel.
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Crop yield (Y) and depth of water table (X in dm). At shallow depth the yield reduces.
Crop yield (Y) and depth of water table (X in dm). At shallow depth the yield reduces.
Antique Dutch windmills used to pump water into the embanked river to prevent waterlogging of the lowlands (polders) behind them.
Antique Dutch windmills used to pump water into the embanked river to prevent waterlogging of the lowlands (polders) behind them.