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008190513s1988    oncbd  #ob   f000 0 eng d
040 |aCaOODSP|beng|erda|cCaOODSP
041 |aeng|bfre
043 |anl-----
0861 |aEn13-5/88-44E-PDF
1001 |aBarica, J., |eauthor.
24510|aRecovery of the Laurentian Great Lakes, 1970-1985 : |beutrophication aspects / |cJ.M. Barica.
264 1|aBurlington, Ontario, Canada : |bNational Water Research Institute, Lakes Research Branch, Canada Centre for Inland Waters, Environment Canada, |c[1988]
300 |a1 online resource (20 unnumbered pages) : |bmaps, graphs.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aNWRI contribution ; |v88-44
500 |aTitle from cover.
500 |aDigitized edition from print [produced by Environment and Climate Change Canada].
504 |aIncludes bibliographical references.
5203 |a"Eutrophication of the Laurentian Great Lakes accelerated exponentially during the first half of this century. Canada and the United States recognized this fact and signed the 1972 Great Lakes Water Quality Agreement. Since then, coordinated activities have resulted in a massive cleanup, unprecedented in history. Major wastewater treatment programs have been implemented. With expenditures totaling over eight billion dollars, industrial controls and phosphate limitations in detergents produced a reduction and even a reversal of the eutrophication process. The long-term trend of total phosphorus concentrations have been downward since the mid 70's when legislation on phosphorus reduction was put into effect. Nuisance algal blooms are no longer a common occurrence and Cladophora infestations of nearshore areas are declining"--Abstract.
546 |aIncludes abstract and management perspective in English and French.
69207|2gccst|aWater quality
69207|2gccst|aLakes
69207|2gccst|aEnvironmental management
7101 |aCanada. |bEnvironment Canada.
7102 |aNational Water Research Institute (Canada). |bLakes Research Branch.
7102 |aCanada Centre for Inland Waters.
830#0|aNWRI contribution ;|v88-44.|w(CaOODSP)9.844121
85640|qPDF|s1.84 MB|uhttps://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-88-44-eng.pdf