Waste Flow Diagram
The Waste Flow Diagram (WFD) tool estimates the amounts of solid waste that leak into nature and oceans by various sources. Through a scenario function, it simulates how improved waste management could reduce environmental pollution and avoid marine litter.
The WFD was developed since insufficient waste management is considered one major source of marine litter, especially along coats and rivers. Understanding the leaks and pathways of plastic waste into the environment is key in developing effective measures to beat plastic pollution.
Marine litter poses a global risk to marine ecosystems, the fishing and tourism industry as well as possibly human health. About 60 to 90% of marine litter consists of plastics, much of which comes from single-use products and packaging. According to estimates, between 4.8 and 12.7 million tons of plastic debris leak into the world’s oceans each year. In a business-as-usual scenario annual marine plastic pollution will triple by 2040.
On behalf of BMZ, the tool was developed in cooperation by GIZ, the University of Leeds, Eawag-Sandec and Wasteaware. It is based on a preliminary method as applied in two case studies as part of the report "Marine Litter Prevention".