Thin Lei Win -
Fast-dwindling mangroves in Myanmar’s low-lying Ayeyarwady Delta, ravaged by decades of deforestation and conversion of land for agriculture and aquaculture, could find an unlikely saviour — drones.
Mangroves protect coastlines in the face of storms and rising sea levels, absorb carbon from the atmosphere, and boost fish stocks, experts say.
Yet, Myanmar has lost more than one million hectares of mangroves since 1980, said Arne Fjortoft, founder and secretary-general of Worldview International Foundation (WIF), which has worked with two local universities to restore mangroves in the Southeast Asian nation since 2012.
In the delta region, known as the country’s rice bowl, only 16 per cent of original mangrove cover remains, Fjortoft, former chairman of Norway’s Liberal Party, said.
There is an is “urgent need” to restore mangroves to stem saltwater invasion of farmland and shoreline erosion due to sea level rise, he added.
WIF has so far planted some three million mangrove trees, but the task is laborious and time-consuming.
Drones, on the other hand, could plant trees 10 times faster and cut costs by half, according to UK-based start-up BioCarbon Engineering (BCE).
Once the process is fully automated, a single pilot operating six drones can plant up to 100,000 trees per day, BCE says.
In late July, the inaugural BridgeBuilder Challenge, which awards $1 million in prize money for ideas with global impact, selected as one of its winners a proposal by BCE and WIF to test the use of BCE’s drones to plant a million mangroves in Myanmar.
The plan covers 250 hectares and involves training and employing locals to collect and prepare seeds, as well as maintain, monitor and protect the fragile ecosystems.
It still requires approval from Myanmar’s authorities, but Bremley Lyngdoh, a WIF board member, is hopeful work could start later this year.
Drones are particularly useful in complicated or dangerous terrain that is hard for people to access, said Irina Fedorenko, a co-founder of BCE.
They could contribute to meeting the international community’s commitment to restore 350 million hectares of degraded forests and agricultural land by 2030, she said. Experts say thriving mangrove ecosystems can store two to four times more carbon than most other tropical forests.
They also provide breeding grounds for fish and other sea creatures.
Yet, they are being destroyed at rates three to five times higher than global deforestation, a 2014 UN report warned.
BCE’s technology aims to change that.
First, drones flying 100 metres above the ground take highly detailed, 3D images of the land while sensors record information such as soil type, soil quality and moisture. The data is then used to create a planting pattern, pinpointing the best spots and species to plant in each location.
Then a drone uploaded with the mapping information flies two metres above the ground, shooting biodegradable seed pods designed to enhance germination success. A drone carrying 300 seed pods can cover one hectare in 18 minutes.
“Mangroves grow very fast. We will see results in a year, but we will know what’s working or not in six months, so there is time to modify the technology and the pods,” said Fedorenko.
Once perfected in Myanmar, the technology could help other large-scale restoration projects, said WIF’s Lyngdoh.
Long associated with military operations, drones’ growing availability, improved performance and falling costs have led to their application in humanitarian situations.
In June, Vanuatu’s government announced a plan to test the use of drones to deliver life-saving vaccines and health supplies to remote communities in the Pacific archipelago.
And Myanmar, with help from the United Nations’ Food and Agriculture Organization, will soon begin using drone-mapping technology to reduce disaster risks to agriculture.
— Thomson Reuters Foundation
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