China’s era of building mega-dams ends with rise of solar, wind power

Bloomberg

It’s the beginning of the end for the era of mega-dam building in China.
China Three Gorges Corp turned on the first set of generators at the massive Wudongde hydropower plant, deep in the mountains of Yunnan province. About 170 kilometres (106 miles) downstream on the Jinsha River sits Baihetan, the last of its kind, scheduled to go into operation next year.
At full run, the two sites will produce more electricity than every power plant in The Philippines combined. They’re the final two mega-dams in a Chinese construction boom that goes back more than half a century, one that became increasingly mired in controversy over the trade-off between the benefits of the renewable energy and flood prevention and the social and environmental costs.
Now, China’s hydro industry is down-shifting towards smaller projects and pumped storage. Engineers have run out of the easiest locations to power massive sets of turbines and the falling cost of rival energy sources such as solar mean it isn’t worth moving on to more challenging locations.
“It’s so cheap developing renewables and coal-fired power, why bother injecting huge sums of money to develop hydro 2,000 kilometres deep in the Tibetan plateau,” said Frank Yu, an analyst with Wood Mackenzie Ltd. “The future of hydro is going to be pumped storage and is also going to be smaller and smaller.”
China’s dam-building era began in the 1950s, soon after the Communist Party gained power, but it reached a crescendo in the past two decades. After Baihetan gears up to full capacity in late 2022, China will have completed five of the world’s 10-biggest hydropower plants in just 10 years.
China’s dams generated more electricity in 2017 than the total supply of every other country in the world besides the US and India.
Hydro Power
Harnessing China’s rivers, which flow from the snowy peaks in the west to the fertile deltas in the east, has always been a prime concern of its leaders. More than 4,000 years ago, the emperor known as Yu the Great gained eternal fame by employing dikes, dams and canals to control flooding that plagued the ancient civilisation.
The Communist Party used a disastrous flood in 1931 to argue that the Kuomintang government was a failure, and when Mao Zedong took over in 1949 dam-building was a priority. But construction and engineering were often subpar, resulting in more disasters like the Banqiao and Shimantan dam collapses in 1975 that killed as many as 240,000 people.
As China emerged onto the global scene in the late 1990s, so too did its dam-building industry.
“Since the turn of the century, the country has more than quadrupled its installed capacity and accounted for over half of global hydropower growth,” said Samuel Law, an analyst for the International Hydropower Association.
The modern mega-dam building period began in earnest with the long-touted project to block the Yangtze River at the base of the Three Gorges, a series of narrow passageways between mountains that hem in China’s longest river.
The project was unusually controversial in China. Proponents touted the benefits of clean energy, improved navigation and the chance to tame one of the nation’s most flood-prone rivers.