We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Flood Characteristics Drive River-Scale Macroplastic Deposition
AI summary Read the abstract
Researchers analyzed macroplastic deposition along river floodplains during 14 events across two Dutch rivers, comparing flood and non-flood conditions. They found that larger floods deposited two to three times more plastic than non-flood conditions, with deposition patterns varying by flood type: summer floods trapped plastics in inundated vegetation while winter floods deposited plastics in wide, slow-flowing floodplain sections. The study suggests that as flood severity and plastic pollution both increase, floods will play an even more prominent role in distributing plastic pollution.
Plastic pollution is a global environmental challenge that negatively impacts species, ecosystems, and human livelihoods. River basins, with high population densities and poor waste management, are particularly exposed to plastic pollution. Floods amplify the presence of plastic in rivers by mobilizing previously deposited materials and introducing new plastics. Yet, the fate of these mobilized plastics remains unclear, with observations suggesting either downstream export or floodplain deposition. This study assesses flood impact on macroplastic deposition along river floodplains, using data from 14 events─five floods and nine nonflood conditions─across two Dutch rivers. Higher flood return periods increased macroplastic deposition, with the two largest floods depositing two to three times more macroplastic than nonflood conditions. Deposition mechanisms varied by flood type. Obstruction-based deposition dominated during an extreme summer flood, when macroplastics accumulated mainly in inundated vegetation. Low-energy deposition prevailed during a long winter flood, with high plastic concentrations found in wide floodplain sections where flow velocities decreased. Flood severity and plastic entry into the environment are both projected to increase. Therefore, we expect an even more prominent role for floods in the global distribution of plastic pollution.
More Papers Like This
Preferential deposition of macroplastic on floodplains
AI summary Read the abstract
When rivers flood, they carry large plastic debris onto floodplains — and researchers studying two major Dutch rivers found that debris piles and riparian vegetation are the primary traps for this plastic waste. Soft, flexible plastics (like bags and textiles) tend to snag in trees and shrubs, while rigid plastics are more likely to settle on the ground. Understanding exactly where and how plastic accumulates during flood events can help authorities target cleanup efforts more effectively and prevent these materials from eventually breaking down into microplastics.
Macroplastic retention on river floodplains following flood events
AI summary Read the abstract
Researchers investigated macroplastic retention dynamics on river floodplains following flood events, examining how elevated flows transport and deposit plastic debris beyond the main channel. The study quantified floodplain retention relative to channel retention and assessed how flood magnitude influences remobilization and downstream delivery of plastics toward the sea.
River plastic during floods: Amplified mobilization, limited river-scale dispersion
AI summary Read the abstract
Researchers investigated plastic mobilization, transport, and retention dynamics in rivers during flood conditions, finding that high-discharge flood events amplify plastic mobilization from riverbanks and floodplains but that river-scale dispersal of that plastic remains surprisingly limited. They found that most flood-mobilized plastic is re-deposited within the river catchment rather than exported to the ocean, reinforcing the concept that rivers act as both conduits and long-term reservoirs of plastic pollution.
Macroplastic retention on river floodplains following flood events
AI summary Read the abstract
Researchers examined macroplastic retention on river floodplains following flood events, quantifying how much plastic debris is deposited beyond river channels during high-flow conditions and assessing remobilization potential. The study provided data supporting the role of floodplains as significant sinks and secondary sources of macroplastics in riverine transport to the sea.
River plastic transport and deposition amplified by extreme flood
AI summary Read the abstract
This study found that extreme flooding events dramatically increase the amount of plastic transported and deposited by rivers. During a major flood in the Netherlands, plastic transport rates surged and large amounts of plastic were deposited on riverbanks and floodplains. This matters because climate change is making extreme floods more frequent, which could spread plastic pollution into new areas and increase human exposure.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.