Bonjour, We reduce the ...

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Bonjour,

We reduce the algae production in small lakes for storing water for irrigation by installing ahead a smaller dam for reducing the speed of the river flow in a larger bassin with 0.50 to 1 m depth maxi. It allows bacterias at the bottom of the small bassin to feed on the coming nitrates with the flow. It reduces the nitrates from 0.35 mg/l to 0.11. Then in teh main lake we have less nutrients as they have sedimented whyle crossing the small bassin we call bassin de décantage