uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Estimated Trophic State Effects and Abatement Costs in Connection with Improved Urban Sewage Treatment in the Gulf of Riga
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
2012 (English)In: Journal of environmental engineering, ISSN 0733-9372, Vol. 138, no 6, 663-672 p.Article in journal (Refereed) Published
Abstract [en]

Environmental conflicts of interest are important to account for when environmental policies are designed. This paper explores the quantitative connection between urban wastewater 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. The implementation cost and the likely effect on total fish biomass also have been assessed. Computer simulations by using the previously published model CoastMab suggested that good water quality according to the European Union (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 also in the whole Baltic Sea drainage basin. The Secchi depth would double according to these simulations, whereas total phosphorus and summer chlorophyll concentrations would decrease by 54% and 53%, respectively. The total fish biomass should be expected to decrease by approximately 42% if good water quality (as defined in EU directives) should be achieved. However, changes in total fish biomass also could be offset by changes in other important determinants, such as climate-related variables or fishing pressure. The study estimated that it could take approximately 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 Euro 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.

Place, publisher, year, edition, pages
2012. Vol. 138, no 6, 663-672 p.
Keyword [en]
Urban sewage treatment, Trophic state, Fish, Eutrophication
National Category
Earth and Related Environmental Sciences
URN: urn:nbn:se:uu:diva-178690DOI: 10.1061/(ASCE)EE.1943-7870.0000510ISI: 000305116800008OAI: oai:DiVA.org:uu-178690DiVA: diva2:542628
Available from: 2012-08-02 Created: 2012-08-01 Last updated: 2012-08-02Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Bryhn, Andreas C.
By organisation
In the same journal
Journal of environmental engineering
Earth and Related Environmental Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 183 hits
ReferencesLink to record
Permanent link

Direct link