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. 2017 Feb 7;113:11–21. doi: 10.1016/j.watres.2017.01.060

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Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.

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Fig. 4 — Occurrence, mean concentration, and maximum concentrations of the sum of human viruses and the sum of bovine viruses during low-flow and runoff-event periods at eight sampling locations on tributaries of the Great Lakes from February 2011 to June 2013 with sampling locations ordered by highest to lowest percent urban land cover from left to right.