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<br />0(162
<br />
<br />were the only chemical constituents that occasionally
<br />exceeded the water-quality standards established by the
<br />Colorado Department of Health (1987).
<br />The average phytoplankton densities in Lake
<br />Henry were about 38 percent of the average phy-
<br />toplankton densities in Lake Meredith. Blue-green
<br />algae comprised the largest percentage of the phy-
<br />toplankton densities in both lakes. The trophic status of
<br />both lakes is eutrophic; however, Lake Meredith could
<br />be considered more eutrophic than Lake Henry.
<br />
<br />SELECTED REFERENCES
<br />
<br />Abbolt. P.O.. 1985, Description of water-systems operations
<br />in the Arkansas Riverbasin, Colorado: U.S. Geological
<br />Survey Water-Resources Investigations
<br />Report 85-4092, 67 p.
<br />Brilton. L. J., Averelt, R.C, and Ferreira, R.E. 1975. An
<br />introduction to the processes, problems. and manage-
<br />ment of urban lakes: U.S. Geological Survey
<br />Circular 601-K, 22 p.
<br />Brilton. L. J., and Greeson. P.E.. 1989, Methods for collec-
<br />tion and analyses of aquatic biological and microbio-
<br />logical samples: U.S. Geological Survey Techniques of
<br />Water-Resources Investigations, bk. 5, chap. A4, 363 p.
<br />Brilton, L. J.. and Wentz. D.A.. 1980, Water-quality charac-
<br />teristics of selected lakes and reservoirs in Colorado:
<br />U.S. Geological Survey Water-Resources Investiga-
<br />tions Open-File Report 80-436, 139 p.
<br />Brown, Eugene, Skougstad, M.W., and Fishman. MJ., 1970.
<br />Methods for collection and analysis of water samples
<br />for dissolved minerals and gases: U.S. Geological Sur-
<br />vey Techniques of Water-Resources Investigations,
<br />bk. 5. chap. AI, 160 p.
<br />Cain. Doug, 1985, Quality of the Arkansas River and iniga-
<br />lion-return flows in the lower Arkansas River Valley,
<br />Colorado: U.S. Geological Survey Water-Resources
<br />Investigations Report 84-4273, 85 p.
<br />Carlson. R.E., 1977, A trophic state index for lakes: Limnol-
<br />ogy and Oceanography. v. 22. no. 2, p. 361-369.
<br />_1979, A review of the philosophy and construction of
<br />trophic state indices. in Maloney, T.E., ed., Lake and
<br />reservoir classification syslems: Corvallis, Oreg., U.S.
<br />Environmental Protection Agency, EPA-600/3-79-074,
<br />p. I-52.
<br />Colorado Department of Health, 1987, Classifications and
<br />numeric standards, Arkansas River basin: Denver,
<br />Colorado Department of Health, Water Quality Control
<br />Commission, 72 p.
<br />Dillon, P.l.. and Rigler, EH., 1974, The phosphorus-
<br />chlorophyll relationship in lakes: Limnology and
<br />Oceanography. v. 19. no. 5, p. 767-773.
<br />Fishman. M. J., and Friedman, L.C, eds., 1985, Methods for
<br />determination of inorganic substances in water and flu.
<br />
<br />vial sediments: U.S. Geological Survey Open-File
<br />Report 85-495, 709 p.
<br />Goldman, CR., and Home, AJ., 1983, Limnology: New
<br />York, McGraw-Hili. 464 p.
<br />Greeson, P.E., 1971, The limnology of Oneida Lake with
<br />emphasis on factors contributing to algal blooms: U.S.
<br />Geological Survey Open-File Report. 185 p.
<br />_1982, An annotated key to the identification of com-
<br />monly occuning and dominant genera of algae
<br />observed in the phytoplankton of the United States:
<br />U.S. Geological Survey Water-Supply Paper 2079,
<br />138 p.
<br />Hem, J.D., 1985, Study and interpretation of the chemical
<br />characteristics of natural water (3d ed.): U.S. Geologi-
<br />cal Survey Water-Supply Paper 2254, 263 p.
<br />Hutchinson, G.E., 1957, A treatise on limnology,
<br />v. I-Geography, physics and chemistry: New York,
<br />John Wiley, 1.015 p.
<br />_1967, A treatise on limnology, v. 2-lntroduction to
<br />lake biology and the limnoplankton: New York, John
<br />Wiley,I,115p.
<br />Knowlton, M.E. Hoyer, M. V., and Jones, JR. 1984, Sources
<br />of variability in phosphorus and chlorophyll and their
<br />effects on use of lake survey data: Water Resources
<br />Bulletin, v. 20. no. 3, p. 397-407.
<br />Lennan, Abraham, ed.. 1978. Lakes-chemistry. geology,
<br />physics: New York. Springer- Verlag, 363 p.
<br />McCoy, G.A., 1982. Phytoplankton, in Greeson, P.E., ed.,
<br />Biota and biological principles of the aquatic environ-
<br />ment: U.S. Geological Survey Circular 848-A,
<br />p. A17-A21.
<br />National Academy of Sciences, National Academy of Engi-
<br />neering, 1973, Water quality criteria, 1972: Washing.
<br />ton, D.C., U.S. Environmental Protection Agency,
<br />EPA-R3-73-033, 594 p.
<br />Nicholls, K.H., and Dillon. PJ.. 1978. An evaluation of
<br />phosphorus-ch lorophy II-phytoplankton relationsh i ps
<br />for lakes: International Revue der Gesamten Hydrobi-
<br />ologie, v. 63. no. 2. p. ] 4 I - I 54.
<br />Organisation for Economic Co-operation and Development.
<br />1982, Eutrophication of water-monitoring, assess-
<br />ment and control: Paris, 154 p.
<br />Palmer, CM., 1977, Algae and water pollution: Cincinnati,
<br />Ohio, U.S. Environmental Protection Agency,
<br />EPA-600/9-77-036, ]23 p.
<br />Ryding, Sven-Olof, 1988, Control of eutrophicalion of lakes
<br />and reservoirs: Cambridge. Eng., Cambridge Univer-
<br />sity Press, I v., [UNESCO Man and Biosphere series].
<br />Smith, Y.H., 1983, Low nitrogen to phosphorus ratios favor
<br />dominance by blue-green algae in lake phytoplankton:
<br />Science, v. 22 I, no. 4611, p. 669-671.
<br />U.S. Environmental Protection Agency, 1986, Quality
<br />criteria for water, 1986: EPA 440/5-86-00 I, I v.
<br />
<br />SELECTED REFERENCES 31
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