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Estimated trophic state effects and abatement costs in connection with improved urban sewage treatment in the Gulf of Riga

Bryhn, Andreas (2012). Estimated trophic state effects and abatement costs in connection with improved urban sewage treatment in the Gulf of Riga. Journal of environmental engineering. 138:6, 663-672
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Official URL: http://dx.doi.org/10.1061/(ASCE)EE.1943-7870.00005...

Abstract

Environmental conflicts of interest are important to account for when environmental policies are designed. This paper explores the quantitative connection between urban waste water treatment, coastal eutrophication, and fish biomass in the mesotrophic Gulf of Riga (northern Europe). The probable effect on the water quality from one clearly defined abatement measure, improved urban sewage treatment has been studied. Furthermore, the implementation cost and the likely effect on total fish biomass have also been assessed. Computer simulations using the previously published model CoastMab suggested that good water quality according to the EU Marine Strategy Framework Directive could be achieved if urban sewage treatment would be upgraded to Nordic and German standards, and not only around the Gulf of Riga but in the whole Baltic Sea drainage basin. The Secchi depth would double according to these simulations while total phosphorus and summer chlorophyll concentrations would decrease by 54% and 53%, respectively. The total fish biomass should be expected to decrease by about 42% if “good” water quality (as defined in European Union directives) should be achieved. However, changes in total fish biomass could also be offset by changes in other important determinants such as climate related variables or fishing pressure. The study estimated that it could take about 20-40 years after abatement action for the trophic state in the Gulf to stabilise again. Upgrading urban sewage treatment to this extent would cost 468-1,118 million euros per year. Treatment could have substantial positive effects on the water quality of the Gulf but could also have adverse side effects on the total fish biomass.

Authors/Creators:Bryhn, Andreas
Title:Estimated trophic state effects and abatement costs in connection with improved urban sewage treatment in the Gulf of Riga
Series/Journal:Journal of environmental engineering (0733-9372)
Year of publishing :2012
Volume:138
Number:6
Page range:663-672
Publisher:American Society of Civil Engineering
ISSN:0733-9372
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Accepted version
Full Text Status:Public
Agris subject categories.:M Aquatic sciences and fisheries > M01 Fisheries and aquaculture - General aspects
M Aquatic sciences and fisheries > M40 Aquatic ecology
X Agricola extesions > X30 Life sciences
X Agricola extesions > X50 Chemistry
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 104 Chemical Sciences > Other Chemistry Topics
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Other Biological Topics
(A) Swedish standard research categories 2011 > 2 Engineering and Technology > 208 Environmental Biotechnology > Water Treatment
(A) Swedish standard research categories 2011 > 2 Engineering and Technology > 208 Environmental Biotechnology > Other Envionmental Biotechnology
Keywords:Gulf of Riga, sewage treatment, water quality, fish biomass
URN:NBN:urn:nbn:se:slu:epsilon-e-576
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-576
Additional ID:
Type of IDID
DOI10.1061/(ASCE)EE.1943-7870.0000510
ID Code:8955
Department:(NL, NJ) > Department of Aquatic Resources
Deposited By: Dr Andreas C Bryhn
Deposited On:23 Aug 2012 07:55
Metadata Last Modified:02 Dec 2014 10:51

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