The Longtang Dam (龙塘大坝), also known as Longtang Reservoir and Nandu River Dam , is located on the Nandu River at Longtang, Hainan , China.
7-410: When the water level is low enough this concrete dam serves as a river crossing for vehicles and pedestrians. The dam has a normal water level of 7.7 metres. At 11.5 metres, an alert is issued. When the dam is closed, large metal doors are lowered at each end to prevent access. The dam also has hydro electric stations on both banks. The Nandu River Hydro Station consists of a power generation station on
14-782: Is a Haikou Water project, and is under the supervision of the Haikou Nandu River Water Diversion Project . At 12:00, August 19, 2016, after Tropical Storm Dianmu brought heavy rains, the water level at the dam reached 13.35 metres, a ten-year high. This prompted a yellow alert indicating that water levels for the Nandu River downstream of the dam would be around two metres higher than normal. 19°53′09″N 110°25′14″E / 19.885723°N 110.420625°E / 19.885723; 110.420625 , Mill race A mill race , millrace or millrun , mill lade (Scotland) or mill leat (Southwest England)
21-648: Is the current of water that turns a water wheel , or the channel ( sluice ) conducting water to or from a water wheel. Compared with the broad waters of a mill pond , the narrow current is swift and powerful. The race leading to the water wheel on a wide stream or mill pond is called the head race (or headrace ), and the race leading away from the wheel is called the tail race (or tailrace ). A mill race has many geographically specific names, such as leat , lade, flume, goit, penstock . These words all have more precise definitions and meanings will differ elsewhere. The original undershot waterwheel, described by Vitruvius ,
28-563: The east and west bank, both operational. The west station's head race is essentially a concrete wall within the river that diverts some water to the station. The station has five, small generators. Planning for the East Hydro Station started in 1998. Work began in 2001, and in November 2011, it began operating. The station receives water from a head race that runs along the east side of the river for approximately 200 metres. Water enters
35-416: The similar name of Lode exist in neighbouring districts. As technology advanced, the stream was dammed by a weir . This increased the head of water. Behind the weir was the millpond , or lodge. The water was channelled to the waterwheel by a sluice or millrace- this was the head race . From the waterwheel, the water was channelled back to the course of the stream by a sluice known as the tail race . When
42-569: The turbine, which is the Chongqing-made GZ SK115-WP-275. The SFG2500-40/2860 generator can receive a 5.5-metre intake of head water at a rate of 54.8 cubic metres per second. It is attached to speed monitor model PWST-100-4. This system is mostly automated and can be managed and monitored from the central control office located on the western bank of the Nandu. The generator's output capacity is 5,000 kW (2 x 2,400 kW / 6.3 kV). This station
49-456: Was a 'run of the river wheel' placed so a fast flowing stream would press against and turn the bottom of a bucketed wheel. In the first meaning of the term, the millrace was the stream; in the sense of the word, there was no separate channel, so no race. The example of Mill Lade in Godmanchester refers to a wide channel leading to moorings where laden vessels unload, similar waterways known by
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