Definition of colmatage
New Zealand : the impounding of silt-laden water to build up low-lying areas
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Origin and Etymology of colmatage
French, from colmater to impound silt-laden water (from colmate silt, from Italian colmata, from colmare to heap up, to build up by silt-laden water, from colmo top, summit, from Latin culmin-, culmen) + -age — more at hill
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