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A notch weir is any weir where the physical barrier is significantly higher than the water level except for a specific notch (often V-shaped) cut into the panel. At times of normal flow all the water must pass through the notch, simplifying flow volume calculations, and at times of flood the water level can rise and submerge the weir without ...
Water supply and sanitation in Vietnam; Data; Access to an improved water source: 98% (2015) [1] Continuity of supply: 21.6 hours per day on average in 68 cities (2009), often at low pressure: Average urban water use (L/person/day) 50 (2004 in small towns), [2] 80−130 (2009 in towns and cities) [3] Average urban water and sanitation tariff ...
A waste weir on a navigable canal is a slatted gate on each canal level or pound, to remove excess water and to drain the canal for repairs or for the winter shutdown. [1] This differs for a dam or reservoir, for which a waste weir is another name for a spillway , i.e. not having the boards to adjust the water height nor the paddles to drain ...
The Ministry of Natural Resources and Environment (MONRE, Vietnamese: Bộ Tài nguyên và Môi trường) is a government ministry in Vietnam responsible for: land, water resources; mineral resources, geology; environment; hydrometeorology; climate change; surveying and mapping; management of the islands and the sea.
The water availability in Vietnam is supposed to be 830-840 billion m 3 annually from which approximately 37% is generated on Vietnamese territory. More than 2,000 rivers (with a length >10 km) and more than 100 main rivers belong to Vietnam. 13 of these rivers have a basin area of more than 10,000 km 2 with 10 being international ones.
Từ điển bách khoa toàn thư Việt Nam (Encyclopedia of Vietnam), a state-sponsored encyclopedia which was published in 2005. Vietnamese Wikipedia, a project of the Wikimedia Foundation. Vietnam War encyclopedias. Encyclopedic works and encyclopedias focused on Vietnam War-related topics.
The Vietnamese Wikipedia initially went online in November 2002, with a front page and an article about the Internet Society.The project received little attention and did not begin to receive significant contributions until it was "restarted" in October 2003 [3] and the newer, Unicode-capable MediaWiki software was installed soon after.
A fishing weir, fish weir, fishgarth [1] or kiddle [2] is an obstruction placed in tidal waters, or wholly or partially across a river, to direct the passage of, or trap fish. A weir may be used to trap marine fish in the intertidal zone as the tide recedes, fish such as salmon as they attempt to swim upstream to breed in a river, or eels as ...