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Underground rainwater tanks can also be used for retention of stormwater for release at a later time and offer a variety of benefits. In arid climates, rain barrels are often used to store water during the rainy season for use during dryer periods. Rainwater tanks may have a high (perceived) initial cost.
Rainwater or surface run-off from rooftops, courtyards, or artificially prepared catchments (locally called agor) flow into the tank through filtered inlets in the wall of the pit. [2] [3] The water stored saves people from the daily task of walking long distances to fetch water from sources which are often contaminated.
Pressure control water tank. The Metropolitan Area Outer Underground Discharge Channel (Japanese: 首都圏外郭放水路, Hepburn: shutoken gaikaku hōsuiro), popularly known as G-Cans, is an underground water infrastructure project in Kasukabe, Saitama, Japan.
A stormwater detention vault is an underground structure designed to manage excess stormwater runoff on a developed site, often in an urban setting. This type of best management practice may be selected when there is insufficient space on the site to infiltrate the runoff or build a surface facility such as a detention basin or retention basin .
Environmental experts say even a pinprick-size hole in an underground tank can send 400 gallons of fuel a year into the ground, polluting soil and water. Spills can also destroy habitat and kill ...
There were two types: the tank cistern and the filter cistern. Such a filter cistern was built at the Riegersburg in Austrian Styria, where a cistern was hewn out of the lava rock. Rain water passed through a sand filter and collected in the cistern. The filter cleaned the rain water and enriched it with minerals. [citation needed]
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