The University of KwaZulu-Natal has teamed with The Ocean Cleanup, a Dutch non-profit developing advanced technologies, to rid the oceans of plastic to investigate the mechanisms of plastic pollution in the Umgeni River and its transportation through all seasons.
“This is a project about mapping, trapping, collecting, processing, testing, modelling and engaging,” said South African Research Chair (SARChI) for Waste and Climate Change, Professor Cristina Trois, who is lead investigator on the project along with colleague, Dr Thomas Mani from The Ocean Cleanup. “How many plastic items have you used today already? Are you possibly using one just now? The answers are very likely ‘many’ and ‘yes’,” said Mani. Trois said this was not surprising considering plastic’s roaring success through the global markets starting in the 1950s. “Today, more than 400 million tons of plastic products are purchased every year worldwide. Rivers are believed to be major pathways for plastic waste on land to reach the oceans. A brand-new global modelling study indicates that 0.8 – 2.7 million tons of plastics are transported towards the oceans yearly, with small urban rivers among the most polluting,” said Trois. According to the study, five major streams in the Durban area may carry as much as 1 340 tons alone towards the Indian Ocean. Among these is the beautiful but plastic-infested Umgeni River, estimated 380 tons per year. “It still largely remains a mystery what the true anthropogenic and environmental mechanics are which drive this riverine plastic transport,” said Mani. “From the belief that you need to understand a problem to be able to truly solve it, The Ocean Cleanup pursues a strong research emphasis in line with its mission to rid the world’s oceans of plastic by deploying mechanical clean-up devices in the offshore ocean as well as in rivers,” said Mani.
With the use of satellite imagery, airplanes and drones, river cameras, floating GPS trackers, “litter-boom” waste characterisation, underwater sampling and beach litter characterisation this research partnership is specifically seeking to find new insight into the seasonal dynamics of plastic waste transport through the Umgeni River system and provide a replicable model for cities in the West Indian Ocean (WIO) region. To kick-off this exciting research voyage, a workshop was held between all involved stakeholders including UKZN, The Ocean Cleanup, the National Department of Science and Innovation (DSI) through the RDI Waste Roadmap, eThekwini Municipality, The Bateleurs, Durban Green Corridors, and Sustainable Seas Trust (SEAS). A team from The Ocean Cleanup including Dr Mani joined UKZN researchers for the initial mapping flight over the Umgeni River catchment on 27 May with a light airplane provided by The Bateleurs, a non-profit group of volunteer pilots who avail their aircrafts for conservation causes.
