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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 ...
According to a national urban water benchmarking system set up by the Viet Nam Water Supply and Sewerage Association (VWSA) with the support for the Asian Development Bank, non-revenue water is reported by provincial water companies as having been reduced from 39% in 2000 to around 30% in 2009 on average. However, VWSA itself questions the ...
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.
Entrance sign at the tunnels. Part of the tunnel complex at Củ Chu, this tunnel has been made wider and taller to accommodate tourists. The tunnels of Củ Chi (Vietnamese: Địa đạo Củ Chi) are an immense network of connecting tunnels located in the Củ Chi District of Ho Chi Minh City (Saigon), Vietnam, and are part of a much larger network of tunnels that underlie much of the country.
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.
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Tràng An is a scenic area near Hoa Lư, Vietnam renowned for its boat cave tours. [1] On 23 June 2014, at the 38th session of the World Heritage Committee in Doha, the Trang An Scenic Landscape Complex was inscribed as a UNESCO World Heritage Site. [2] The Trang An Scenic Landscape Complex includes Hoa Lư and Tam Cốc/Bích Động.
The water catchment area of the control survey is 22664 square kilometers, accounting for 98.38% of the total water catchment area of the upper reaches of the Minjiang River. The other is Yangliuping Dam at the outlet of Baisha River, with a controlled catchment area of 363 square kilometers, accounting for 1.58% of the total catchment area.