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An outdoor water-use restriction is a ban or other lesser restrictions put into effect that restricts the outdoor use of water supplies. Often called a watering ban or hosepipe ban,〔Water company may impose hosepipe ban - http://news.bbc.co.uk/1/hi/england/cumbria/10394098.stm〕 it can affect: *irrigation of lawns *car washing *recreational uses such as filling swimming pools and using water slides *planting of grass or control of the types of grass planted *hosing down pavement areas Such bans may be put in place by local governments, or by a state government.〔Know your limits on outdoor water use - http://www.insidehalton.com/opinion/columns/article/831892--know-your-limits-on-outdoor-water-use〕 In the latter case, local authorities often still can enact more restrictive measures. Such a ban is usually enacted during droughts, to preserve water for essential uses such as drinking and flushing toilets, as well as for firefighting. If there is a water main break, or a problem with a water tower or other reservoir, a ban may be enacted on a very local and temporary basis. Bans that control water and plant uses can be permanent. Greywater recycling is becoming a necessity due to shortages in freshwater supply, an increase in populations with its associated food supply, and economic development. == Restrictions == Typical restrictions include: *the "odd/even" system, whereby odd-numbered addresses water on odd-numbered dates, and even-numbered ones on even-numbered dates *There are also day-based restrictions where water use is restricted to specific days of the week *time restrictions based on the hour of the day. Usage may be prohibited from noon or late morning until late afternoon or evening. This is the time of day, when much of the spray is lost to evaporation. The use of drip irrigation systems may or may not be exempt from the restrictions, or be less restricted than normal water sprinklers. Businesses that use water as a critical part of their operations are usually not exempt. This includes car washes, plant nurseries, and other landscaping companies. A typical restriction on a car wash would be to recycle the water. Abuse of restrictions usually brings a warning at first, then a fine, and can lead to the cutoff of the water to the home or business. Enforcement is generally by the local water authority or even from police. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Outdoor water-use restriction」の詳細全文を読む スポンサード リンク
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