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Title (Primary) Relationship between discharge and river plastic concentrations in a rural and an urban catchment
Author Wagner, S.; Klöckner, P.; Stier, B.; Römer, M.; Seiwert, B.; Reemtsma, T.; Schmidt, C.;
Journal Environmental Science & Technology
Year 2019
Department ANA; HDG;
Volume 53
Issue 17
Language englisch;
POF III (all) T31; T42;
Supplements https://pubs.acs.org/doi/suppl/10.1021/acs.est.9b03048/suppl_file/es9b03048_si_001.pdf
Abstract Rivers play a major role in the transport of plastic debris from inland sources such as urban areas into the marine environment. The present study examined plastic particle concentrations and loads (>500 μm) upstream and downstream of an urban subcatchment over 15 months and investigated the relationship between river water discharge (Q) and plastic concentration (C). The plastic particle concentration increases by 0.8 g/1000 m3 or 79 n/1000m3 from the rural to the urban subcatchment. In the rural subcatchment, C does not increase with increasing Q (p = 0.57), whereas a positive relationship between C and Q exists downstream of the urban catchment (p = 0.00003). Combined sewer overflows likely contribute additional plastic loads during high flow conditions. Based on the CQ relationship, we estimate the total plastic export in 2016 from the entire catchment to be 3.0 × 106 n/year or 2.6 × 104 n/(km2 year) and 15 n/(cap year). Because of the positive CQ relationship, 90% of the plastic load is transported during 20% of the time. The analysis of time-resolved plastic concentration data in rivers provides a data-driven tool to better estimate plastic loads and to better understand the catchment controls of plastic in rivers.
ID 22124
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=22124
Wagner, S., Klöckner, P., Stier, B., Römer, M., Seiwert, B., Reemtsma, T., Schmidt, C. (2019):
Relationship between discharge and river plastic concentrations in a rural and an urban catchment
Environ. Sci. Technol. 53 (17), 10082 - 10091