Sealing pond bottoms with muddy water

Sealing pond bottoms with muddy water

Seepage losses from constructed wetlands, wildlife refuges, wastewater lagoons, runoff collection ponds, and other engineered surface impoundments of water or aquatic ecosystems in areas with deep groundwater levels can be minimized with artificial liners (plastic, compacted earth, etc.) or with nat...

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Bibliographic Details
Published in:Ecological engineering Vol. 18; no. 2; pp. 233 - 238
Main Authors: Bouwer, Herman, Ludke, Jamie, Rice, Robert C
Format: Journal Article
Language:English
Published: Elsevier B.V 01-12-2001
Subjects:
Compaction
Earth linings
Freshwater
Impoundments
Layering
Seepage
Seepage control
Slurries
Wetlands
Seepage
Seepage control
Earth linings
Layering
Compaction
Impoundments
Slurries
Wetlands
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Summary:Seepage losses from constructed wetlands, wildlife refuges, wastewater lagoons, runoff collection ponds, and other engineered surface impoundments of water or aquatic ecosystems in areas with deep groundwater levels can be minimized with artificial liners (plastic, compacted earth, etc.) or with natural processes like sediment accumulation and microbiological and chemical processes. Sediment accumulation can be increased by deliberately adding soil slurries or muddy (turbid) water. When these are applied to the water surface, settling of the particles to the bottom then creates a graded sediment layer with the coarsest particles on the bottom and the finest particles on top. Column studies in the laboratory showed that, for a given amount of soil added, such a graded layer gives more seepage control than a compacted earth liner. Also, split slurry applications to create a layered lining gave more seepage control than when the same total amount of soil was given in one single slurry application. Subsequent addition of sodium carbonate to the water reduced seepage even more, giving a total seepage reduction in the columns from 1000 to 0.2 cm/day. The study also indicates the importance of avoiding turbid inflows into infiltration basins for groundwater recharge, as well as soil erosion within the basins themselves, if infiltration rates need to be maximized.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:0925-8574
1872-6992
DOI:10.1016/S0925-8574(01)00071-4