• This field is for validation purposes and should be left unchanged.
  • Earth.Org Newsletters

    Get focused newsletters especially designed to be concise and easy to digest

  • This field is for validation purposes and should be left unchanged.
SHOP Support

A study has found that China’s Mekong River dams held back large amounts of water during a damaging drought in downstream countries in 2019 despite China experiencing higher-than-average water levels upstream. 

US-based research company, Eyes on Earth, conducted a ‘Wetness Index’ observational study, which looked at the wet season period from May to October and found that the severe lack of water in the Lower Mekong during the wet season of 2019 was largely influenced by the restriction of water flowing from the upper Mekong during that time.

China disputed the findings, saying that there was low rainfall during last year’s monsoon season on its portion of the 4 350km river.

However, satellite imagery of surface wetness in China’s Yunnan province, through which the Upper Mekong flows, suggest the region in 2019 actually had slightly above-average combined rainfall and snowmelt during the May to October wet season. 

You might also like: Fukushima’s Shift to Renewable Energy Sets An Example for the Rest of Japan

Mekong River, China: the Conflict

Last year’s drought, which saw the Lower Mekong at its lowest levels in more than 50 years, devastated farmers and fisherman and saw the river recede to expose sandbanks along some stretches, with some parts drying up entirely when fishing should have been plentiful. At one gauge in Chiang Saen in northern Thailand, such low water levels had never been recorded before. 

Alan Basist, co-author of the report, and his colleague studied this gauge over a 28-year period and calculated that dams in China had held back more than 410 feet of river height. 

The river supports 60 million people as it flows past Laos, Myanmar, Thailand and through Cambodia and Vietnam. Beijing’s control of the upstream Mekong provides as much as 70% of the downstream water in the dry season. 

“If the Chinese are stating that they were not contributing to the drought, the data does not support that position,” stated Basist. “There was a huge volume of water that was being held back in China”, Basist added. 

Adding to the downstream woes were sudden releases of water from China, which often came unannounced and drowned crops that had been planted near the banks because of the drought. Local fisheries have complained that their catches have faced a very steep decline, while agriculture harvests are stagnant as a result of the persistent droughts and unpredictable floods.

Studies by the Mekong River Commission, an intergovernmental organisation that works with governments of Laos, Cambodia, Thailand and Vietnam to jointly manage the shared water resources and the sustainable development of the river, further predicts that the decrease of local agricultural production will result in these countries being over-dependent on China for food imports, ‘making them even more vulnerable to Chinese influence’. 

In February, the Chinese foreign minister had asserted to regional foreign ministers that China was suffering from the drought as well. He added that even in the unprecedented times of the coronavirus outbreak, the government was being magnanimous in sending water downstream’. Basist, however, refutes this claim.

“You look at our mapping, and it’s bright blue with plenty of water in China and bright red from an extreme lack of water in Thailand and Cambodia,” he said. “China can regulate this river flow through dams and that appears to be exactly what it’s doing”. 

He adds, “The satellite data doesn’t lie, and there was plenty of water in the Tibetan Plateau, even as countries like Cambodia and Thailand were under extreme duress. There was just a huge volume of water that was being held back in China.” 

Today, the Chinese section of the river in the southwest of the nation has 11 damns, which produce more power than the region needs. These water reserves in China are swelling, as dam reservoirs fill with the glacial melt that has fed into the River for thousands of years.

Basist says, “Glaciers are bank accounts of water but with climate change they’re melting fast. The Chinese are building safe deposit boxes on the upper Mekong because they know the bank account is going to be depleted eventually and they want to keep it in reserve.”

Since China doesn’t have any formal water treaties with countries in the lower Mekong regions, cooperation between the countries is poor. The Mekong River Commission works with the governments of Laos, Cambodia, Thailand and Vietnam, but China is noticeably absent.

Forest fires ravaged northern Thailand in late March, following severe bushfires in the Amazon, Australia and Indonesia in 2019. The bush fire has finally been brought under control, but it has left behind extensive environmental damage. Not only is there a loss of flora and fauna, but it has also brought about serious air pollution, causing the upper North to choke under a toxic shroud.

The Fires and Possible Causes

According to satellite data from the Geo-Informatics and Space Technology Development Agency (GISTDA), a Thai space agency, there were 3 809 fire hotspots in Thailand, 5 061 in Laos, and 10 061 in Myanmar as of 28 March 2020. 

It is believed that the majority of the forest fires began at the Doi Suthep-Pui National Park in Chiang Mai’s Muang District in northern Thailand. About 10% of Thailand’s hotspots (398 hotspots) were found in Chiang Mai.

Response from the Government

Thai government spokeswoman, Narumon Pinyosinwat, explained that agribusiness, particularly the slash-and-burn practices, is one of the possible causes of the fires. Slash-and-burn farming is a form of shifting agriculture where natural vegetation is cut down and burnt in order to clear the land for cultivation. When the plot of land becomes infertile, the farmer moves to a new plot and repeats the process.

She also attributed the fires to a combination of factors including the recent drought, prevailing wind patterns that occasionally trap polluted air in the northern region, as well as arson.

The government’s admission that human actions played a dominant role in the fires is in stark contrast to those of other administrations, in particular, Australia, who said that it was ‘not credible’ to draw a connection between recent bushfires that devastated the country In January, and the climate crisis. 

The Thai government deployed 500 local officials and soldiers from the Royal Thai Army 3rd Army Region, as well as several helicopters with drones and paragliders, to help combat the blaze.

The Governor of Chiang Mai, Charoenrit Sanguansat, said that officials from different sectors have been collaborating in Doi Suthep-Pui National Park to ensure a prompt response to any further outbreak; officials are building firebreaks in the national park so that in the event of another fire breaking out, firefighters will be able to put it out immediately. 

Authorities have also restricted villagers of the Hang Dong District from slash-and-burn farming practices until the end of April. However, they have yet to mention if this will be a measure that may be made permanent in the future.

Loss of Habitat and Wildlife Species

Forests in northern Thailand, like Doi Suthep-Pui National Park, are rich in biodiversity. There are approximately 2 000 species of ferns and flowering plants and about 360 species of birds in the park. Some rare amphibian species such as Theloderma gordoni (Gordon’s bug-eyed frog), Tylototriton uyenoi (Chiang Mai newt), Ichthyophis youngorum (Chiang Mai caecilian), Leptobrachium chapaense (Sapa spadefoot toad) and Megophrys parva (Small horned toad) also inhabit the park.

Once a lush green area covering the equivalent of three football fields, forests in Northern Thailand have now turned into black ash. According to Nation Thailand, one of the country’s most popular hiking spots, Twenty rai of Doi Mon Jong mountain in Chiang Mai province, was scorched by the fires.

Air Pollution and Health

The forest fires have led to increased regional air pollution in northern Thailand. PM2.5 levels- levels of particulate matter of 25 microns or less in diameter- measured between 47 and 251 micrograms per cubic meter in the air. Additionally, fine dust pollution has reached ‘unhealthy levels’ in eight provinces, including Chiang Rai, Chiang Mai, Lampang, Phrae, Nan, Phayao, Sukhothai and Kamphaeng Phet. 

Fire smoke contains a high concentration of pollutants and fine particles that penetrate into human lungs and cross into the blood stream, resulting in adverse health impacts. It can exacerbate respiratory problems such as asthma, emphysema, chronic obstructive pulmonary disease and cardiovascular conditions such as chest pain, irregular heart rate, myocardial infarction and cardiac arrest.

Bush and Forest Fires in the Climate Crisis

Bush and forest fires are increasing in frequency and intensity as a result of the climate crisis. According to a report from the University of East Anglia published in January, human-induced global warming provides conditions that fires thrive in. Over the past few decades, as the world has warmed gradually, so has its potential to burn. High temperatures and low humidity are two crucial factors in fire risk and activity.

Lightning bolts are the main natural cause of wildlife fires. Meanwhile, with hotter and drier conditions, it’s more likely that an accidental human-ignited fire will rage out of control, spread to other places and transform into a massive wildfire. The past few years have seen a staggering amount of bush and forest fires around the world; in 2019, wildfires took place in the Amazon, Australia, Indonesia, Greece, Spain, Turkey, France and Russia and in 2018, California experienced bushfires.

Decreasing greenhouse gas emissions is crucial to mitigate the intensity and frequency of fires, and burn-and-slash deforestation practices should cease immediately.

Featured image: Takeaway

Subscribe to our newsletter

Hand-picked stories once a fortnight. We promise, no spam!

Instagram @earthorg Follow Us