What are the disadvantages of building hydropower stations in the parallel rivers of China?

destroying the natural scenic area of the three parallel rivers; Geological disasters (**landslides and debris flows) are frequent; The transmission range is long; The transportation is inconvenient, the local economy is backward, and the construction is difficult.

The terrain is complex and the construction is difficult.

The geological structure belongs to the karst landform.

The surrounding biological species diversity, rich human resources, and are in the process of applying for World Heritage Status.

Protection. After the completion of the hydropower station, it will inevitably destroy the surrounding biological resources.

1.On the Hengduan Mountains, the terrain is high and the bottom is very undulating, and it costs a lot of money.

2.Destruction of surrounding ecological resources.

3.The transportation is inconvenient, the local economy is backward, and the construction is difficult.

Located in the longitudinal valley area of the Hengduan Mountains in the southern extension of the Qinghai-Tibet Plateau in northwest Yunnan, the Hengduan Mountains have unfavorable conditions, the terrain is high, the bottom is very undulating, the cost is very large, and the construction difficulty will be difficult.

The parallel flow of the three rivers refers to the Jinsha River, the Lancang River and the Nu River, which originate from the Qinghai-Tibet Plateau, and flow more than 170 kilometers in parallel from north to south in Yunnan Province, passing through the lofty mountains and mountains such as Danlika Mountain, Gaoligong Mountain, Nu Mountain and Yunling Mountain, forming a rare situation in the world"The rivers flow together without converging"of peculiar natural geographical landscapes. During this period, the shortest straight-line distance between the Lancang River and the Jinsha River is 66 kilometers, and the shortest straight-line distance between the Lancang River and the Nu River is less than 19 kilometers.

Consisting of the Nu River, the Lancang River, the Jinsha River and the mountains within their basins, the Three Parallel Rivers Natural Landscape covers an area of 1.7 million hectares, including 9 nature reserves and 10 scenic spots in Lijiang City, Diqing Tibetan Autonomous Prefecture and Nujiang Susu Autonomous Prefecture in Yunnan Province. It is located at the intersection of the three major geographical regions of East Asia, South Asia and the Qinghai-Tibet Plateau, and is a rare representative area of alpine landforms and their evolution in the world, and is also one of the regions with the richest biological species in the world. The scenic spot spans three prefectures: Lijiang area, Diqing Tibetan Autonomous Prefecture and Nujiang Susu Autonomous Prefecture.

The natural landscape of the three parallel rivers consists of the Nu River, the Lancang River, the Jinsha River and the mountains in their basins, covering an area of 1.7 million hectares.

The reason for this is the miracle of the evolution of the earth's crust--- there are several parallel mountain ranges in this place. In addition, rainfall is abundant, and there is alpine snowmelt. Therefore, the natural landscape of three parallel rivers has been created.

Yunnan Three Parallel Rivers Nature Reserve: It belongs to the Three Parallel Rivers Nature Reserve, located in the Sanjiang National Park in the northwest mountainous area of Yunnan Province, and is the upstream section of three famous rivers in Asia, the Jinsha River.

upper reaches of the Yangtze River), Lancang River (Mekong River.

upstream) and the Nu River.

Upper Salween River) three large rivers run parallel in this area.

In the Hengduan Mountains of southwest China, this place is the Nu River, the Lancang River, and the Jinsha River, mainly because of the topography, this place has several parallel mountain ranges. In addition, rainfall is abundant, and there is alpine snowmelt. So this is the case.

There is a mountain function, and three rivers flow right through the canyon.

This place has several parallel mountain ranges. In addition, rainfall is abundant, and there is alpine snowmelt.

Yunnan Three Parallel Rivers Nature Reserve: Located in the Sanjiang National Park in the northwest mountainous area of Yunnan Province, Yunnan Province is the upper reaches of three famous rivers in Asia, with the Jinsha River (upper reaches of the Yangtze River), the Lancang River (upper reaches of the Mekong River) and the Nu River (upper reaches of the Salween River) running parallel to each other in this area.

The project started in October 1976 and was stopped in June 1979 due to financial and geological reasons. In 1985, the construction was resumed.

On April 4, 1985, the Shimen Sanjiangkou Hydropower Project Headquarters and the Eighth Hydropower Bureau signed a project construction contract, and in May of the same year, the Sixth Engineering Company of the Eighth Bureau entered the site to organize civil construction. After the formation of the cofferdam on the left bank and the concrete poured out of the low water surface elevation, the Changde Special Administration convened a relevant meeting to study and determine the "separate construction plan", the Eighth Bureau of Hydropower concentrated on the construction of the right bank plant dam, and Shimen County organized forces to be responsible for the construction of the dam on the left bank, and signed a supplementary construction contract in June 1988, making it clear that the Eighth Bureau of Hydropower contracted permanent construction projects, permanent mechanical and electrical projects, temporary construction projects, water diversion and mold spring tail canal projects. After nearly four years of arduous construction, the Eighth Bureau basically completed the construction of the right bank plant and dam project in 1988, the first unit generated power on January 28, 1989, and the civil works were completed in September of the same year.

In 1992, all five units were put into operation for power generation.

Sanjiangkou Hydropower Station was installed on the right bank of the old power station 5, the expansion is to arrange two 25MW bulb through-flow hydro generator units in the left bank of the original hub of the earth dam section, with its rated head, to ensure the output of 17MW, the average power generation for many years. The stand-alone design refers to the flow rate of cubic meters in seconds. The power station is designed according to the principle of "no one on duty" (less people on duty), and adopts a full computer monitoring system.

The expansion power station adopts 220kV and 110kV secondary voltage access system, and the 220kV outgoing circuit is connected to the Panshan 220kV substation once (LGJ-400 16), and the 110kV outgoing line is connected to the old station once.

The hub project is composed of riverbed workshops, overflow dams, connecting dams, gravity dams on both banks, earth dams and water-slope ship lifts (to be built), etc., which are classified buildings. The maximum dam height, the elevation of the dam crest, the total length of the dam crest, of which the overflow dam is long, and the plant dam section is long. Overflow dam weir crest elevation, install 32 10 8m (width and height) arc steel gates, by 12 QPQ 2 40T trolley type hoists to operate the gates; There is a clear width road bridge at the top of the dam; The flood discharge adopts the mixed energy dissipation form of right bank surface flow and left bank bottom flow.

There are 5 units with a single capacity of 10,000 kW in the power plant plant, with a capacity of 10,000 kW and an annual power generation capacity of 100 million kW·h.