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The construction of artificial reefs began in ancient times. According to historian Diodorus Siculus, the Romans blocked the harbor of Lilybaeum during the First Punic War against the Carthaginians around 250 BC. They built an artificial reef "with stones and construction material" and put poles in the channels using "large timbers and anchors".
An integrated constructed wetland is an unlined free surface flow constructed wetland with emergent vegetated areas and local soil material. Its objectives is not only to treat wastewater from farmyards and other wastewater sources, but also to integrate the wetland infrastructure into the landscape and enhancing its biological diversity .
Pond at Cornjum, Netherlands A man made pond at sunset in Montgomery County, Ohio. Stereoscopic image of a pond in Central City Park, Macon, GA, c. 1877. A pond is a small, still, land-based body of water formed by pooling inside a depression, either naturally or artificially.
The 52-year-old construction worker was underwater for over an hour before divers got to him. ... A 52-year-old man died when the construction bulldozer he was in slipped into a man-made pond.
Waste stabilization ponds consist of man-made basins comprising a single or several series of anaerobic, facultative or maturation ponds. [11] The presence or absence of oxygen varies with the three different types of ponds, used in sequence. Anaerobic waste stabilization ponds have very little dissolved oxygen, thus anaerobic conditions prevail.
These dams are characterized by a slender vertical puddle clay core supported on both sides by earthfill shoulders of more heterogeneous material. To control under-seepage through the natural foundation below the dam, the Pennines embankments generally constructed a puddle clay-filled cutoff trench in rock directly below the central core.
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