愛污传媒

Skip to main content

China is seeding clouds to replenish its shrinking Yangtze River

A cracked riverbed in a section of Yangtze River in Yunyang, Chongqing, is shown here on August 16. (Visual China Group/Getty Images) A cracked riverbed in a section of Yangtze River in Yunyang, Chongqing, is shown here on August 16. (Visual China Group/Getty Images)
Share

Chinese planes are firing rods into the sky to bring more rainfall to its crucial Yangtze River, , as swaths of the nation fall into drought and grapple with the worst heat wave on record.

Several regions on the Yangtze have launched weather modification programs, but with cloud cover too thin, operations in some drought-ravaged parts of the river's basin have remained on standby.

The Ministry of Water Resources said in a notice on Wednesday that drought throughout the Yangtze river basin was "adversely affecting drinking water security of rural people and livestock, and the growth of crops."

On Wednesday, central China's Hubei province became the latest to announce it would seed clouds, using silver iodide rods to induce rainfall.

The silver iodide rods -- which are typically the size of cigarettes -- are shot into existing clouds to help form ice crystals. The crystals then help the cloud produce more rain, making its moisture content heavier and more likely to be released.

Cloud seeding has been in practice since the 1940s and China has the biggest program in the world. It used seeding ahead of the Beijing Olympics in 2008 to ensure dry weather for the event, and the technique can also be used to induce snowfall or to soften hail.

At least 4.2 million people in Hubei have been affected by a severe drought since June, Hubei's Provincial Emergency Management Department said Tuesday. More than 150,000 people there have difficulties accessing drinking water, and nearly 400,000 hectares of crops have been damaged because of high temperatures and drought.

The Yangtze is just one of many rivers and lakes and shrinking amid relentless heat and low rainfall, including Lake Mead in the US and the Rhine River in Germany. These extreme weather conditions have been supercharged by the human-induced climate crisis, driven by burning fossil fuels.

Communities often rely on these bodies of water for economic activity and governments are having to intervene with adaptation measures and relief funds, costing huge amounts of money.

China is deploying such funds and developing new supply sources to deal with the impacts on crops and livestock. Some livestock has been temporarily relocated to other regions, the Ministry of Finance said earlier this week, adding it would issue 300 million yuan ($44.30 million) in disaster relief.

To boost downstream supplies, the Three Gorges Dam, China's biggest hydropower project, will also increase water discharges by 500 million cubic meters over the next 10 days, the Ministry of Water Resources said Tuesday.

The heat also forced authorities in the southwestern province of Sichuan -- home to around 84 million people and a key manufacturing hub -- this week to ease a power shortage.

'LONGEST' AND 'STRONGEST' HEAT WAVE ON RECORD

China issued its highest red alert heat warning for at least 138 cities and counties across the country on Wednesday, and another 373 were placed under the second-highest orange alert, the Meteorological Administration said.

As of Monday, China's heat wave had lasted 64 days, making it the longest in more than six decades, since full records began in 1961, the National Climate Center said in a statement. It also said it was the "strongest" on record and warned that it could worsen in the coming days.

"The heat wave this time is prolonged, wide in scope, and strong in extremity," the statement read. "Taken all signs together, the heat wave in China will continue and its intensity will increase."

The heat wave has also registered the largest number of counties and cities exceeding 40 degrees Celsius (104 degrees Fahrenheit) since records began, according to the statement. The number of weather stations recording temperatures of 40C and above has reached 262, also the highest. Eight have hit 44C.

Persistently high temperatures are forecast to continue in the Sichuan Basin and large parts of central China until August 26.

A "special case" of high pressure from the West Pacific subtropical high, stretching across much of Asia, is likely to be the cause of the extreme heat, said Cai Wenju, climate researcher with CSIRO, Australia's national scientific research institute.

CTVNews.ca Top Stories

Sometimes love is written in the stars, but for one couple, it鈥檚 written in the aurora borealis.

Vigars passed away peacefully in a B.C. hospital earlier this week. He was 78.

A BC NDP campaign office in Campbell River received a bomb threat Friday afternoon, according to the party.

A British Columbia First Nation says at least 55 children died or disappeared while attending a residential school near Williams Lake, more than triple the number recorded for the institution in the National Centre for Truth and Reconciliation memorial register.

A woman from Montreal's South Shore appeared in court on Friday on charges of aggravated assault after allegedly scalding a 10-year-old boy with boiling water more than one week ago.

Two young men are facing second-degree murder charges in connection with the fatal fire in Old Montreal that killed L茅onor Geraudie, 43, and her daughter V茅rane Reynaud-Geraudie on Oct. 4.

The Canadian Food Inspection Agency (CFIA) has issued a recall for Rana brand Tagliatelle Seasoned White Chicken and Mushroom sauce, citing possible Listeria contamination.

Local Spotlight

James Taylor never expected to be walking home with a bag full of groceries he didn't buy.

This weekend marks the fifth anniversary of a large blizzard that paralyzed Manitoba.

There was an eye-catching mix of rainbows and lightning over Vancouver following a brief downpour this week.

Jeff Warner from Aidie Creek Gardens in the northern Ontario community of Englehart has a passion for growing big pumpkins and his effort is paying off in more ways than one.

Saskatchewan鈥檚 Jessica Campbell has made hockey history, becoming the first ever female assistant coach in the National Hockey League (NHL).

Have you ever seen videos of hovercrafts online or on TV and thought, 'Wow, I wish I could ride one of those.' One Alberta man did, and then built his own.

A B.C. couple is getting desperate 鈥 and creative 鈥 in their search for their missing dog.

Videos of a meteor streaking across the skies of southern Ontario have surfaced and small bits of the outer space rock may have made it to land, one astronomy professor says.

A unique form of clouds made an appearance over the skies of Ottawa on Sunday evening.