Lakes and Watercourses

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REPORT 5050 Environmental Quality Criteria Lakes and Watercourses SWEDEN HAS AN ABUNDANCE OF LAKES AND WATERCOURSES but the biological diversity in many of them has unfortunately declined. Many lakes have been hard hit by acidification and eutrophication. Locally, elevated concentrations of metals is a major problem. The environmental state of lakes and watercourses can be interpreted using the model criteria in this report. The report is one of a series of six reports published by the Swedish Environmental Protection Agency under the heading ENVIRONMENTAL QUALITY CRITERIA. The reports are intended to be used by local and regional authorities, as well as other agencies, but also contain useful information for anyone with responsibility for, and an interest in, good environmental quality. Reports available in English are: Report No. • Groundwater 5051 • Coasts and Seas 5052 • Contaminated Sites 5053 Abridged versions in English of all the six reports are available on the Agency’s home page: www.environ.se (under the headline legislation/guidelines). ISBN 91-620-5050-8 ISSN 0282-7298
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Environmental Quality Criteria - La
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TO ORDER Swedish Environmental Prot
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Reference Group Mats Bengtsson, Swe
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Summary This report on lakes and wa
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included. In addition to a large nu
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ased estimates are used. Given that
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TABLE 1. SUMMARY of parameters incl
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16 The current conditions scale in
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(in Swedish with English summary).
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conditions for watercourse flora an
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show the availability of nitrogen i
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Mean concentration of total phospho
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TABLE 9. DEVIATION from reference v
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Comments Classifications must be ba
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winter/spring, i.e. ice-covered per
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Light conditions Introduction Light
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TABLE 13. CURRENT CONDITIONS: turbi
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Acidity / acidification Introductio
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industrial pH). The change in acidi
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The pre-industrial concentration of
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very high degree of reliability and
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TABLE 19. CURRENT CONDITIONS: metal
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TABLE 22. DEVIATION from reference
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TABLE 24. (continued) Cu Zn Cd Pb C
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Swedish EPA (1993): Metals and the
Page 53 and 54: Assessment of current conditions TA
Page 55 and 56: TABLE 29. CURRENT CONDITIONS: poten
Page 57 and 58: TABLE 32. DEVIATION from reference
Page 59 and 60: References Cronberg, G., Lindmark,
Page 61 and 62: (see Appendix 1). If submerged and
Page 63 and 64: References Andersson, B. (1998): Va
Page 65 and 66: The genera in question and their tr
Page 67 and 68: Benthic fauna Introduction Benthic
Page 69 and 70: TABLE 41. CURRENT CONDITIONS: botto
Page 71 and 72: Comments The assessment must be bas
Page 73 and 74: has yielded better results than did
Page 75 and 76: TABLE 45. CURRENT CONDITIONS: fish,
Page 81 and 82: TABLE 48. (Contd.) Proportion of al
Page 84 and 85: Presentation of data When using the
Page 86 and 87: APPENDIX 1 Ceratophyllum demersum 1
Page 88 and 89: APPENDIX 2 Calculation of index and
Page 90 and 91: APPENDIX 2 Table 1b. Indicator gene
Page 92 and 93: Genus Indicator value -------------
Page 94 and 95: APPENDIX 2 45 Planorbis sp. 46 Anis
Page 96 and 97: APPENDIX 2 214 Leuctra hippopus 215
Page 98 and 99: APPENDIX 2 384 Tinodes waeneri 385
Page 100 and 101: APPENDIX 2 (6) O/C index (Wiederhol
Page 102 and 103: APPENDIX 3 Dace Stäm Leuciscus leu
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