References
- Allaway, C. (2014). River Wye SAC: Nutrient management plan. Atkins, Epsom. Retrieved February 14, 2019, from https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/361793/River_Wye_NMP_final_report_v3_14052014.pdf.
- Andrady, A. L. (2003). Plastics and the environment. John Wiley & Sons. Wiley Online Library Google Scholar.
- Andrady, A. L., & Neal, M. A. (2009). Applications and societal benefits of plastics. Philosophical Transactions of the Royal Society B: Biological Sciences, 364(1526), 1977–1984. https://doi.org/10.1098/rstb.2008.0304
- Bayo, J., Martínez, A., Guillén, M., Olmos, S., Roca, M.-J., & Alcolea, A. (2017). Microbeads in commercial facial cleansers: Threatening the environment. CLEAN – Soil, Air, Water, 45(7), https://doi.org/10.1002/clen.201600683
- Best, J. (2019). Anthropogenic stresses on the world's big rivers. Nature Geoscience, 12(1), 7–21. https://doi.org/10.1038/s41561-018-0262-x
- Blettler, M. C. M., Abrial, E., Khan, F. R., Sivri, N., & Espinola, L. A. (2018). Freshwater plastic pollution: Recognizing research biases and identifying knowledge gaps. Water Research, 143, 416–424. https://doi.org/10.1016/j.watres.2018.06.015
- Blettler, M. C. M., Ulla, M. A., Rabuffetti, A. P., & Garello, N. (2017). Plastic pollution in freshwater ecosystems: Macro-, meso-, and microplastic debris in a floodplain lake. Environmental Monitoring and Assessment, 189(11), 1–13. https://doi.org/10.1007/s10661-017-6305-8
- Bloomfield, R. (1811). The banks of Wye; A poem in four books. Vernor, Hood and Sharpe.
- Boucher, J., & Friot, D. (2017). Primary microplastics in the oceans: A global evaluation of sources (p. 43). IUCN, Gland.
- BPF. (2019a). Polyvinyl Chloride PVC. British Plastics Federation (BPF), London. Retrieved December 21, 2019, from https://www.bpf.co.uk/plastipedia/polymers/pvc.aspx.
- BPF. (2019b). Polyethylene (Low Density) LDPE, LLDPE. British Plastics Federation (BPF), London. Retrieved December 21, 2019, from https://www.bpf.co.uk/plastipedia/polymers/LDPE.aspx.
- Bruge, A., Barreau, C., Carlot, J., Collin, H., Moreno, C., Maison, P., Maison, P., Carlot, J., Moreno, C., Collin, H., Bruge, A., & Barreau, C. (2018). Monitoring litter inputs from the Adour river (Southwest France) to the marine environment. Journal of Marine Science and Engineering, 6(1), 24. https://doi.org/10.3390/jmse6010024
- Carr, S., Liu, J., & Tesoro, A. (2016). Transport and fate of microplastic particles in wastewater treatment plants. Water Research, 91, 174–182. https://doi.org/10.1016/j.watres.2016.01.002
- Castro-Jiménez, J., González-Fernández, D., Fornier, M., Schmidt, N., & Sempere, R. (2019). Macro-litter in surface waters from the Rhone river: Plastic pollution and loading to the NW Mediterranean Sea. Marine Pollution Bulletin, 146, 60–66. https://doi.org/10.1016/j.marpolbul.2019.05.067
- Chen, J., Bouchez, J., Gaillardet, J., & Louvat, P. (2014). Behaviors of major and trace elements during single flood event in the Seine river, France. Procedia Earth and Planetary Science, 10, 343–348. https://doi.org/10.1016/j.proeps.2014.08.034
- Consoli, P., Romeo, T., Angiolillo, M., Canese, S., Esposito, V., Salvati, E., Cotti, G., Andaloro, F., & Tunesi, L. (2019). Marine litter from fishery activities in the Western Mediterranean Sea: The impact of entanglement on marine animal forests. Environmental Pollution, 249, 472–481. https://doi.org/10.1016/j.envpol.2019.03.072
- Crawford, C. B., & Quinn, B. (2017). Microplastic pollutants. Elsevier.
- Crosti, R., Arcangeli, A., Campana, I., Paraboschi, M., & Fernández, D. G. (2019). ‘Down to the river’: Amount, composition, and economic sector of litter entering the marine compartment, through the Tiber river in the Western Mediterranean Sea. Rendiconti Lincei. Scienze Fisiche e Naturali, 29(4), 859–866. https://doi.org/10.1007/s12210-018-0747-y
- Edwards, R. W., Brooker, M. P., & Illies, J. (1982). The ecology of the Wye. Springer Netherlands.
- Eerkes-Medrano, D., Thompson, R. C., & Aldridge, D. C. (2015). Microplastics in freshwater systems: A review of the emerging threats, identification of knowledge gaps and prioritisation of research needs. Water Research, 75, 63–82. https://doi.org/10.1016/j.watres.2015.02.012
- Encyclopedia Britannica. (2013). River Wye. Retrieved February 14, 2019, from https://www.britannica.com/place/River-Wye.
- Environment Agency. (2014). The Wye management catchment: A summary of information about the water environment in the Wye management catchment. Retrieved February 14, 2019, from https://circabc.europa.eu/webdav/CircaBC/env/wfd/Library/framework_directive/implementation_documents_1/2012-2014%20WFD%20public%20information%20and%20consultation%20documents/UK/UK09%20Severn/Wye.pdf.
- Environment Agency. (2015). Water for life and livelihoods: Part 1: Severn River Basin District River Basin management plan. Retrieved February 14, 2019, from https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/718336/Severn_RBD_Part_1_river_basin_management_plan.pdf.
- Eriksen, M., Mason, S., Wilson, S., Box, C., Zellers, A., Edwards, W., Farley, H., & Amato, S. (2013). Microplastic pollution in the surface waters of the Laurentian great lakes. Marine Pollution Bulletin, 77(1-2), 177–182. https://doi.org/10.1016/j.marpolbul.2013.10.007
- EU. (2014). European Commission urban waste water website: United Kingdom. European Union. [Online.] Retrieved December 28, 2019, from https://uwwtd.eu/United-Kingdom/receiving-area/ukwari11/2014.
- European Commission. (2018). Communication from the Commission to the European Parliament, the Council, the European Economic and Social Committee and the Committee of the Regions: A European Strategy for Plastics in a Circular Economy COM/2018/028 final. European Commission, Brussels. Retrieved February 14, 2019, from https://eur-lex.europa.eu/legal-content/EN/TXT/?qid=1516265440535&uri=COM:2018:28:FIN.
- European Commission. (2019). The EU Water Framework Directive - integrated river basin management for Europe. European Commission, Brussels. Retrieved February 14, 2019, from http://ec.europa.eu/environment/water/water-framework/index_en.html.
- Faure, F., Demars, C., Wieser, O., Kunz, M., & de Alencastro, L. F. (2015). Plastic pollution in Swiss surface waters: Nature and concentrations, interaction with pollutants. Environmental Chemistry, 12(5), 582–591. https://doi.org/10.1071/EN14218
- Galgani, F., Hanke, G., Werner, S., & De Vrees, L. (2013). Marine litter within the European marine Strategy Framework Directive. ICES Journal of Marine Science, 70(6), 1055–1064. https://doi.org/10.1093/icesjms/fst122
- Geyer, R., Jambeck, J. R., & Law, K. L. (2017). Production, use, and fate of all plastics ever made. Science Advances, 3(7), e1700782. https://doi.org/10.1126/sciadv.1700782
- Gigault, J., Halle, A. T., Baudrimont, M., Pascal, P. Y., Gauffre, F., Phi, T. L., El Hadri, H., Grassl, B., & Reynaud, S. (2018). Current opinion: What is a nanoplastic? Environmental Pollution, 235, 1030–1034. https://doi.org/10.1016/j.envpol.2018.01.024
- Henry, B., Laitala, K., & Klepp, I. G. (2019). Microfibres from apparel and home textiles: Prospects for including microplastics in environmental sustainability assessment. Science of the Total Environment, 652, 483–494. https://doi.org/10.1016/j.scitotenv.2018.10.166
- HM Government. (2018). Our waste, our resources: A strategy for England. Retrieved February 14, 2019, from https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/765914/resources-waste-strategy-dec-2018.pdf.
- Horton, A. A., Svendsen, C., Williams, R. J., Spurgeon, D. J., & Lahive, E. (2017). Large microplastic particles in sediments of tributaries of the river Thames, UK – abundance, sources and methods for effective quantification. Marine Pollution Bulletin, 114(1), 218–226. https://doi.org/10.1016/j.marpolbul.2016.09.004
- Hurley, R., Woodward, J., & Rothwell, J. (2018). Microplastic contamination of river beds significantly reduced by catchment-wide flooding. Nature Geoscience, 11(4), 251–257. https://doi.org/10.1038/s41561-018-0080-1
- Jambeck, J. R., Geyer, R., Wilcox, C., Siegler, T. R., Perryman, M., Andrady, A., Narayan R., & Law, K. L. (2015). Plastic waste inputs from land into the ocean. Science, 347(6223), 768–771. https://doi.org/10.1126/science.1260352
- Jasso-Gastinel, C. F., & Kenny, J. M. (2016). Modification of polymer properties (plastics design library) (1st ed.). William Andrew Publishers.
- JRC. (2016). Riverine litter monitoring - options and recommendations. Retrieved February 14, 2019, from https://ec.europa.eu/jrc/en/publication/riverine-litter-monitoring-options-and-recommendations.
- Kay, P., Hiscoe, R., Moberley, I., Bajic, L., & McKenna, N. (2018). Wastewater treatment plants as a source of microplastics in river catchments. Environmental Science and Pollution Research, 25(20), 20264–20267. https://doi.org/10.1007/s11356-018-2070-7
- Kole, P. J., Löhr, A. J., Belleghem, F. G. A. J., & Ragas, A. (2017). Wear and tear of tyres: A stealthy source of microplastics in the environment. International Journal of Environmental Research and Public Health, 14, 1–31. https://doi.org/10.3390/ijerph14101265
- Lebreton, L., & Andrady, A. (2019). Future scenarios of global plastic waste generation and disposal. Palgrave Communications, 5(1), article No.6. Retrieved December 24, 2019, from https://www.nature.com/articles/s41599-018-0212-7. https://doi.org/10.1057/s41599-018-0212-7
- Lebreton, L. C. M., van der Zwet, J., Damsteeg, J.-M., Slat, B., Andrady, A., & Reisser, J. (2017). River plastic emissions to the world’s oceans. Nature Communications, 8(1), 15611. https://www.nature.com/articles/ncomms15611. https://doi.org/10.1038/ncomms15611
- Li, J., Liu, H., & Chen, J. P. (2018). Microplastics in freshwater systems: A review on occurrence, environmental effects, and methods for microplastics detection. Water Research, 137, 362–374. https://doi.org/10.1016/j.watres.2017.12.056
- Magnusson, K., Eliasson, K., Fråne, A., Haikonen, K., Hultén, J., Olshammar, M., Stadmark, J., Voisin, A., & Svenska Miljöinstitutet, I. V. L. (2016). Swedish sources and pathways for microplastics to the marine environment: A review of existing data. Study for the Swedish environmental Protection Agency. IVL Swedish Environmental Research Institute. Retrieved February 14, 2019, from http://www.ivl.se/download/18.7e136029152c7d48c205d8/1457342560947/C183+Sources+of+microplastic_160307_D.pdf.
- Magnusson, K., & Norén, F. (2014). Screening of microplastic particles in and down-stream a wastewater treatment plant. Report Number C55, IVL Swedish Environmental Research Institute, Stockholm.
- Magnusson, K., & Wahlberg, C. (2014). Mikroskopiska skräppartiklar i vatten från avloppsreningsverk (Microscopic litter particles in water from WWTPs). IVL Swedish Environmental Research Institute. Report B 2208: 30.
- Mani, T., Hauk, A., Walter, U., & Burkhardt-Holm, P. (2015). Microplastics profile along the Rhine river. Nature: Scientific Reports, 5(1), 17988. https://doi.org/10.1038/srep17988
- McCormick, A. R., Hoellein, T. J., London, M. G., Hittie, J., Scott, J. W., & Kelly, J. J. (2016). Microplastic in surface waters of urban rivers: Concentration, sources, and associated bacterial assemblages. Ecosphere (washington, D C), 7(11), e01556. https://doi.org/10.1002/ecs2.1556
- Meijer, L. J. J., van Emmerik, T., Lebreton, L., Schmidt, C., & van der Ent, R. (2019). Over 1000 rivers accountable for 80% of global riverine plastic emissions into the ocean. Science Advances. https://doi.org/10.31223/osf.io/zjgty
- Miles, R. (2018). . Resident's shock at sewage in River Wye. Hereford Times, 22nd August 2018. Retrieved February 14, 2019, from https://www.herefordtimes.com/news/16591889.residents-shock-at-sewage-in-river-wye/.
- Miralles, L., Gomez-Agenjo, M., Rayon-Viña, F., Gyraitė, G., & Garcia-Vazquez, E. (2018). Alert calling in port areas: Marine litter as possible secondary dispersal vector for hitchhiking invasive species. Journal for Nature Conservation, 42, 12–18. https://doi.org/10.1016/j.jnc.2018.01.005
- Monmouthshire Beacon. (2016). High sewage levels cause river fears. Monmouthshire Beacon, 22nd June 2016. Retrieved February 14, 2019, from http://www.monmouthshirebeacon.co.uk/article.cfm?id=105297&headline=High%20sewage%20levels%20cause%20river%20fears§ionIs=news&searchyear=2016.
- Moore, C. J., Lattin, G. L., & Zellers, A. F. (2011). Quantity and type of plastic debris flowing from two urban rivers to coastal waters and beaches of Southern California. Revista de Gestão Costeira Integrada-Journal of Integrated Coastal Zone Management, 11(1), 65–73. https://doi.org/10.5894/rgci194
- Morritt, D., Stefanoudis, P. V., Pearce, D., Crimmen, O. A., & Clark, P. F. (2014). Plastic in the Thames: A river runs through it. Marine Pollution Bulletin, 78(1-2), 196–200. https://doi.org/10.1016/j.marpolbul.2013.10.035
- Murphy, F., Ewins, C., Carbonnier, F., & Quinn, B. (2016). Wastewater treatment works (WwTW) as a source of microplastics in the aquatic environment. Environmental Science and Technology, 50(11), 5800–5808. https://doi.org/10.1021/acs.est.5b05416
- Natural Resources Wales. (2019). Challenges and choice: Consultation on the summary of significant water management issues for Wales, Western Wales River Basin District and Dee River Basin District, Natural Resources Wales, Cardiff. Retrieved January 4, 2020, from https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=9&ved=2ahUKEwjPjLax6ufmAhVEQEEAHWJzCGkQFjAIegQIBRAC&url=https%3A%2F%2Fcdn.naturalresources.wales%2Fmedia%2F689924%2Fchallenges-and-choices-2019_final-1.pdf%3Fmode%3Dpad%26rnd%3D132115634850000000&usg=AOvVaw2R0rYA5aGwq-8ES9xB6fqW.
- Okoffo, E. D., O'Brien, S., O'Brien, J. W., Tscharke, B. J., & Thomas, K. V. (2019). Wastewater treatment plants as a source of plastics in the environment: A review of occurrence, methods for identification, quantification and fate. Environ. Sci.: Water Res. Technol, 5(11), 1908–1931. https://doi.org/10.1039/C9EW00428A
- PlasticsEurope. (2019). Plastics – the facts 2019: An analysis of European plastics production, demand and waste data. PlasticsEurope, Brussels. Retrieved April 14, 2020, from https://www.plasticseurope.org/application/files/9715/7129/9584/FINAL_web_version_Plastics_the_facts2019_14102019.pdf.
- PrimaryFacts. (2016). River Wye: Primary facts and information. [Online.] Retrieved December 20, 2019, from http://primaryfacts.com/7006/river-wye-facts-and-information/.
- Read, N., Oakes, N., & Meredith, C. (2015). Phosphate reduction feasibility study: A report to Natural England on behalf of the Herefordshire Local Nature Partnership. [Online]. Report Number 2015/02. The Bulmer Foundation, Hereford. Retrieved January 4, 2020, from (https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=2ahUKEwiP0ca49enmAhUHJsAKHRtQC90QFjAAegQIBRAC&url=https%3A%2F%2Fwww.brightspacefoundation.org.uk%2Fsites%2Fdefault%2Ffiles%2Fimce%2F2015-02-Phosphate%2520Reduction%2520Feasibility%2520Study.pdf&usg=AOvVaw3fdBZw6bLz9iiKYRuuSLXv.
- Rodrigues, M. O., Abrantes, N., Gonçalves, F. J. M., Nogueira, H., Marques, J. C., & Gonçalves, A. M. M. (2018). Spatial and temporal distribution of microplastics in water and sediments of a freshwater system (Antuã river, Portugal). Science of The Total Environment, 633, 1549–1559. https://doi.org/10.1016/j.scitotenv.2018.03.233
- Sandri, S. S., & Thompson, R. C. (2014). On the quantity and composition of floating plastic debris entering and leaving the Tamar Estuary, Southwest England. Marine Pollution Bulletin, 81(1), 55–60. https://doi.org/10.1016/j.marpolbul.2014.02.020
- Schmidt, C., Krauth, T., & Wagner, S. (2017). Export of plastic debris by rivers into the Sea. Environmental Science and Technology, 51(21), 12246–12253. https://doi.org/10.1021/acs.est.7b02368
- Schwarz, A. E., Ligthart, T. N., Boukris, E., & van Harmelen, T. (2019). Sources, transport, and accumulation of different types of plastic litter in aquatic environments: A review study. Marine Pollution Bulletin, 143, 92–100. https://doi.org/10.1016/j.marpolbul.2019.04.029
- Scrivin, J. (2017). Dog walkers help clear litter left at the River Side in Ross on Wye. The Ross Gazette, 28th June 2017. Retrieved February 14, 2019, from http://www.rossgazette.com/article.cfm?id=109454&headline=Dog%20walkers%20help%20clear%20litter%20left%20at%20the%20river%20side%20in%20Ross-on-Wye§ionIs=news&searchyear=2017.
- Siegfried, M., Koelmans, A. A., Besseling, E., & Kroeze, C. (2017). Export of microplastics from land to sea. A modelling approach. Water Research, 127, 249–257. https://doi.org/10.1016/j.watres.2017.10.011
- Sigler, M. (2014). The effects of plastic pollution on aquatic wildlife: Current situations and future solutions. Water, Air, & Soil Pollution, 225(11), 1–9. https://doi.org/10.1007/s11270-014-2184-6
- Simon-Sánchez, L., Grelaud, M., Garcia-Orellana, J., & Ziveria, P. (2019). River Deltas as hotspots of microplastic accumulation: The case study of the Ebro river (NW Mediterranean). Science of the Total Environment, 687, 1186–1196. https://doi.org/10.1016/j.scitotenv.2019.06.168
- Talvitie, J., Mikola, A., Setälä, O., Heinonen, M., & Koistinen, A. (2017). How well is microlitter purified from wastewater? – A detailed study on the stepwise removal of microlitter in a tertiary level wastewater treatment plant. Water Research, 109, 164–172. https://doi.org/10.1016/j.watres.2016.11.046
- Thompson, R. C., Moore, C. J., vom Saal, F. S., & Swan, S. H. (2009). Plastics, the environment and human health: Current consensus and future trends. Philosophical Transactions of the Royal Society B – Biological Sciences, 364(1526), 2153–2166. https://doi.org/10.1098/rstb.2009.0053
- UNEP. (2014). United nations environment programme year book 2014: Emerging issues in our global environment. Retrieved February 14, 2019, from http://wedocs.unep.org/handle/20.500.11822/9240.
- van Calcar, C. J., & van Emmerik, T. H. M. (2019). Abundance of plastic debris across European and Asian rivers. Environmental Research Letters, 14(12), 124051. https://doi.org/10.1088/1748-9326/ab5468
- Van der Wal, M., Van der Meulen, M., Tweehuijsen, G., Peterlin, M., Palatinus, A., Kovac, M., Coscia, L., & Krzan, A. (2015). Identification and assessment of Riverine Input of (Marine) Litter [online]. Report number: SFRA0025. Bristol. European Commission. Retrieved February 14, 2019, from http://ec.europa.eu/environment/marine/good-environmental-status/descriptor-10/pdf/iasFinal%20Report.pdf.
- van Emmerik, T., Kieu-Le, T.-C., Loozen, M., van Oeveren, K., Strady, E., Bui, X.-T., Egger, M., Gasperi, J., Lebreton, L., Nguyen, P.-D., Schwarz, A., Slat, B., & Tassin, B. (2018). A methodology to characterize riverine macroplastic emission into the ocean. Frontiers in Marine Science, 5, 372. https://doi.org/10.3389/fmars.2018.00372
- van Emmerik, T., & Schwarz, A. (2020). Plastic debris in rivers. WIREs Water, 7(1), e1398. https://doi.org/10.1002/wat2.1398
- van Emmerik, T., Strady, E., Kieu-Le, T.-C., Nguyen, L., & Gratiot, N. (2019a). Seasonality of riverine macroplastic transport. Scientific Reports, 9(1)), Article number: 13549. https://doi.org/10.1038/s41598-019-50096-1
- van Emmerik, T., Tramoy, R., van Calcar, C., Alligant, S., Treilles, R., Tassin, B., & Gasperi, J. (2019b). Seine plastic debris transport tenfolded during increased river discharge. Frontiers in Marine Science, 6, 642. https://doi.org/10.3389/fmars.2019.00642
- van Wijnen, J., Ragas, A. M. J., & Kroeze, C. (2019). Modelling global river export of microplastics to the marine environment: Sources and future trends. Science of the Total Environment, 673, 392–401. https://doi.org/10.1016/j.scitotenv.2019.04.078
- Vriend, P., van Calcar, C., Kooi, M., Landman, H., Pikaar, R., & van Emmerik, T. (2020). Rapid assessment of floating macroplastic transport in the Rhine. Frontiers in Marine Science, 7. https://doi.org/10.3389/fmars.2020.00010
- Wagner, M., Scherer, C., Alvarez-Muñoz, D., Brennholt, N., Bourrain, X., Buchinger, S., Fries, E., Grosbois, C., Klasmeier, J., Marti, T., Rodriguez-Mozaz, S., Urbatzka, R., Vethaak, A. D., Winther-Nielsen, M., & Reifferscheid, G. (2014). Microplastics in freshwater ecosystems: What we know and what we need to know. Environmental Sciences Europe, 26(12), https://doi.org/10.1186/s12302-014-0012-7
- Water News Europe. (2019). WFD: European river basin organisations plea for revision ‘One out all out’ principle. Water News Europe, 30th June 2019. [Online.] Retrieved December 20, 2019, from https://www.waternewseurope.com/wfd-european-river-basin-organisations-plea-for-revision-one-out-all-out-principle/.
- Webb, H. K., Arnott, J., Crawford, R. J., & Ivanova, E. P. (2013). Plastic degradation and its environmental implications with special reference to poly(ethylene terephthalate). Polymers, 5(1), 1–18. https://doi.org/10.3390/polym5010001
- Welsh Water. (n.d.). Combined sewer overflow monitoring: Hereford. Retrieved December 23, 2019, from https://www.dwrcymru.com/en/devmap/CSO-Monitoring/Hereford.aspx.
- Wessel, C., Swanson, K., Weatherall, T., & Cebriana, J. (2019). Accumulation and distribution of marine debris on barrier islands across the northern Gulf of Mexico. Marine Pollution Bulletin, 139, 14–22. https://doi.org/10.1016/j.marpolbul.2018.12.023
- Williams, A. T., & Simmons, S. L. (1997). Movement patterns of riverine litter. Water, Air, and Soil Pollution [Online], 98(1), 119–139.
- Williams, A. T., & Simmons, S. L. (1999). Sources of riverine litter: The river Taff, south Wales, UK. Water, Air, and Soil Pollution, 112(1), 197–216. https://doi.org/10.1023/A:1005000724803
- Windsor, F. M., Tilley, R. M., Tyler, C. R., & Ormerod, S. J. (2019). Microplastic ingestion by riverine macroinvertebrates. Science of the Total Environment, 646, 68–74. https://doi.org/10.1016/j.scitotenv.2018.07.271
- Winton, D. J., Anderson, L. G., Rocliffe, S., & Loiselle, S. (2020). Macroplastic pollution in freshwater environments: Focusing public and policy action. Science of The Total Environment, 704, 135242. https://doi.org/10.1016/j.scitotenv.2019.135242
- Withers, P. J., Jordan, P., May, L., Jarvie, H. P., & Deal, N. E. (2014). Do septic tank systems pose a hidden threat to water quality? Frontiers in Ecology and the Environment, 12(2), 123–130. https://doi.org/10.1890/130131
- Wye and Usk Foundation. (2019). The fishing passport: River Wye. Retrieved February 14, 2019, from (https://www.fishingpassport.co.uk/fishing/wye.
- Wye and Usk Foundation. (n.d.). Clearing litter. Wye and Usk Foundation, Talgarth. [Online.] Retrieved December 24, 2019, from https://www.wyeuskfoundation.org/clearing-litter.
- Wye Valley AONB Office. (2015). Wye Valley area of outstanding natural beauty (AONB) management plan 2015-2020. Wye Valley AONB Office, Monmouth. Retrieved February 14, 2019, from http://www.wyevalleyaonb.org.uk/index.php/about-us/management-and-guidance/management-plan-2015-2020/.
- Yao, H., You, Z., & Liu, B. (2016). Economic estimation of the losses caused by surface water pollution accidents in China from the perspective of water bodies’ functions. International Journal of Environmental Research and Public Health, 13(2), 154. https://doi.org/10.3390/ijerph13020154
- Zbyszewski, M., & Corcoran, P. (2011). Distribution and degradation of fresh water plastic particles along the beaches of Lake Huron, Canada. Water Air and Soil Pollution, 220(1), 365–372. https://doi.org/10.1007/s11270-011-0760-6
- Zubris, K. A. V., & Richards, B. K. (2005). Synthetic fibres as an indicator of land application of sludge. Environmental Pollution, 138(2), 201–211. https://doi.org/10.1016/j.envpol.2005.04.013