00000nam 2200000zi 4500 9.867990 CaOODSP 20241203113645 m o d f cr nn||||||||| 190205s1987 onca o f000 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn--- En13-5/87-77E-PDF Barica, J., author Increase of nitrate in the Great Lakes / by J. Barica. Burlington, Ontario : National Water Research Institute, Lakes Research Branch, Canada Centre for Inland Waters, 1987. 1 online resource (18 pages) : figures. text txt rdacontent computer c rdamedia online resource cr rdacarrier NWRI contribution ; 87-77 Cover title. "Division control no. ECD-10/87E." "October 1987." "This manuscript was presented at the 5th International Symposium of CIEC "Nitrate Contamination of Natural Waters", Balatonfured, Hungary, September 1987. To be published in the Symposium proceedings. This copy is to provide information prior to publication." Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "In the Laurentian Great Lakes, the world's largest freshwater system, the concentrations of nitrate have increased over the past twenty years by 200% and over. In Lake Superior, this increase hase been four-fold in sixty years, and in Hamilton Harbour on Lake Ontario, six-fold in thirty years"--Abstract. Includes an abstract in French. gccst Water quality gccst Water pollution Canada. Environment Canada. National Water Research Institute (Canada). Lakes Research Branch. NWRI contribution ; 87-77. (CaOODSP)9.844121 PDF 1.36 MB https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-87-77-eng.pdf