Pond liner

Pond liner for a garden pond

A pond liner is an impermeable geomembrane used for water retention, including the lining of lakes, garden ponds and artificial streams in parks and gardens. Pond liners need to be protected from sharp objects (for example, stones) below the liner and from being punctured by any objects in the water body. Protection can be provided with layers of sand, concrete, fiber-matting and other materials. Pond liners are manufactured in rolls. Strips of liner can be seamed or welded together on site; and a number of flexible types, such as PVC and EPDM, can have their panels pre-fabricated together in the factory to fit the design shape of the pond.

The edge of the pond liner can be rolled over and secured in a trench or it can be fixed to a vertical wall made in brick or concrete. Box-shaped pond liners can be made for rectangular structures. The vast majority of flexible pond liners available commercially are manufactured of EPDM, butyl rubber or PVC, with EPDM being the most popular at the moment due to cost. A newer method involves a spray-based coating known as polyurea, and though the cost of using polyurea is considerably higher than flexible sheets, the lifespan of the material may be much longer than any other. The oldest material used for pond liners are made of clay which can be spread and mixed directly into soil to seal a pond. Clay has the longest life span of all pond liners due to its inert mineral composition that can remain stable for thousands of years.^[1]

See also

• Landscape engineering
• Raceway (aquaculture)
• Raceway pond
• Garden pond

References

Ponds, pools and puddles Ponds Ash pond Balancing pond Ballast pond Beel Cooling pond Detention pond Dew pond Evaporation pond Facultative pond Garden pond Ice pond Immersion pond Kettle pond Log pond Melt pond Mill pond Raceway pond Retention pond Sag pond Salt evaporation pond Sediment pond Settling pond Solar pond Stabilization pond Stepwell Stew pond Stormwater management pond Polishing pond Tailings pond Tarn Treatment pond Waste pond Pools Anchialine pool Brine pool Natural pool Plunge pool Reflecting pool Spent fuel pool Stream pool Swimming pool Tide pool Vernal pool Puddles Bird bath Coffee ring effect Puddle Puddles on a surface Seep puddle Biota Beaver pond Duck pond Fish pond Goldfish pond Koi pond Ecosystems Freshwater ecosystem Lake ecosystem Lentic ecosystem Pond ecosystem Related topics Aerated pond Bakki shower Big fish–little pond Body of water Full pond Hydric soil Phytotelma Water aeration Pond of Abundance Pond liner Ponding The Pond Puddle (M C Escher) Spring Swimming hole Water garden Water Lilies (Monet) Water well