Lakes and Watercourses
Lakes and Watercourses Lakes and Watercourses
Contents Foreword 5 Summary 6 Environmental Quality Criteria 7 Environmental Quality Criteria for Lakes and Watercourses 13 Choice of parameters 13 Classification and class delimitation 13 Reference values 17 Division into type areas 18 Nutrients/eutrophication 19 Oxygen status and oxygen-consuming substances 29 Light conditions 32 Acidity/acidification 36 Metals 41 Phytoplankton in lakes 51 Aquatic plants in lakes 59 Periphyton – diatoms in watercourses 63 Benthic fauna 66 Fish 71 Presentation of data 83 Appendix 1 List of species with trophic 84 ranking scores for aquatic plants Appendix 2 Calculation of index and other parameters 87 for assessing benthic fauna Appendix 3 List of Swedish freshwater fish species 100
Reference Group Mats Bengtsson, Swedish Environmental Protection Agency (Secretary) Agneta Christensen, Skaraborg/Västra Götaland County Administrative Board Lars Collvin, Kristianstad/Skåne Country Administrative Board Leif Göthe, Västernorrland County Administrative Board Mats Jansson, Umeå University Catarina Johansson, Swedish Environmental Protection Agency Lennart Lindeström, Swedish Environmental Research Group Lennart Olsson, Älvsborg/Västra Götaland County Administrative Board Eva Thörnelöf, Swedish Environmental Protection Agency Anna Ward, Jönköping County Administrative Board Project Leader: Torgny Wiederholm, Swedish University of Agricultural Sciences Project responsibility at the Swedish Environmental Protection Agency: Kjell Johansson English translation: Maxwell Arding, Arding Language Services AB
- Page 1 and 2: Environmental Quality Criteria - La
- Page 3: TO ORDER Swedish Environmental Prot
- Page 7 and 8: Summary This report on lakes and wa
- Page 11 and 12: included. In addition to a large nu
- Page 13 and 14: ased estimates are used. Given that
- Page 15 and 16: TABLE 1. SUMMARY of parameters incl
- Page 17 and 18: 16 The current conditions scale in
- Page 19 and 20: (in Swedish with English summary).
- Page 21 and 22: conditions for watercourse flora an
- Page 23 and 24: show the availability of nitrogen i
- Page 25 and 26: Mean concentration of total phospho
- Page 27 and 28: TABLE 9. DEVIATION from reference v
- Page 29 and 30: Comments Classifications must be ba
- Page 31 and 32: winter/spring, i.e. ice-covered per
- Page 33 and 34: Light conditions Introduction Light
- Page 35 and 36: TABLE 13. CURRENT CONDITIONS: turbi
- Page 37 and 38: Acidity / acidification Introductio
- Page 39 and 40: industrial pH). The change in acidi
- Page 41 and 42: The pre-industrial concentration of
- Page 43 and 44: very high degree of reliability and
- Page 45 and 46: TABLE 19. CURRENT CONDITIONS: metal
- Page 47 and 48: TABLE 22. DEVIATION from reference
- Page 49 and 50: TABLE 24. (continued) Cu Zn Cd Pb C
- Page 51 and 52: Swedish EPA (1993): Metals and the
- Page 53 and 54: Assessment of current conditions TA
Contents<br />
Foreword 5<br />
Summary 6<br />
Environmental Quality Criteria 7<br />
Environmental Quality Criteria for <strong>Lakes</strong> <strong>and</strong> <strong>Watercourses</strong> 13<br />
Choice of parameters 13<br />
Classification <strong>and</strong> class delimitation 13<br />
Reference values 17<br />
Division into type areas 18<br />
Nutrients/eutrophication 19<br />
Oxygen status <strong>and</strong> oxygen-consuming substances 29<br />
Light conditions 32<br />
Acidity/acidification 36<br />
Metals 41<br />
Phytoplankton in lakes 51<br />
Aquatic plants in lakes 59<br />
Periphyton – diatoms in watercourses 63<br />
Benthic fauna 66<br />
Fish 71<br />
Presentation of data 83<br />
Appendix 1 List of species with trophic 84<br />
ranking scores for aquatic plants<br />
Appendix 2 Calculation of index <strong>and</strong> other parameters 87<br />
for assessing benthic fauna<br />
Appendix 3 List of Swedish freshwater fish species 100
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