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- Koskiaho, Jari, et al.
(författare)
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Carbon and nutrient recycling ecotechnologies in three Baltic Sea river basins – the effectiveness in nutrient load reduction
- 2020
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Ingår i: International Journal of Ecohydrology and Hydrobiology. - : Elsevier B.V.. - 1642-3593 .- 2080-3397. ; 20:3, s. 313-322
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Tidskriftsartikel (refereegranskat)abstract
- There exist numerous ecotechnologies for recovery and reuse of carbon and nutrients from various waste streams before they are lost to runoff. However, it remains largely unknown how growing implementation of such ecotechnologies affect nutrient emissions to surface waters at catchment scale. Here, this knowledge gap is addressed by application of SWAT model in three case study catchments draining to the Baltic Sea: Vantaanjoki (Finland), Fyrisån (Sweden) and Słupia (Poland). Sustainability analysis with Multi-Criteria Analysis was applied in the stakeholder workshops in the case study areas to assess different ecotechnology alternatives. The following ecotechnologies received the highest sustainability scores: in Vantaanjoki anaerobic digestion, based on mostly agricultural residues; in Fyrisån source-separation of wastewaters; in Słupia nutrient extraction within the wastewater treatment process. The effect of application of digestate on agricultural soils in the Vantaanjoki catchment was simulated by adjusting the model parameters describing the organic carbon content and physical properties of soil. The results showed small reductions of nutrient loads to the Gulf of Finland. Larger reductions of nutrient loads to Lake Mälaren in Sweden and the Baltic Sea in Poland were achieved as a result of the wastewater treatment upgrades. In the Fyrisån catchment, higher relative reductions were simulated for TN than TP, and in dry years than in wet years. Although the studied ecotechnologies did not show as high effectiveness in nutrient load reduction as combinations of traditional Best Management Practices reported in literature, they do have other multiple benefits including crop yield increase, electricity, heat and bio-based fertilizer production.
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| 2. |
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| 3. |
- Powell, Neil, et al.
(författare)
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Rethinking Decision Support Under Conditions of Irreducible Uncertainty : Co-Designing a Serious Game to Navigate Baltic Sea Nutrient Enrichment
- 2021
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Ingår i: Society & Natural Resources. - : Informa UK Limited. - 0894-1920 .- 1521-0723. ; 34:8, s. 1075-1092
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Tidskriftsartikel (refereegranskat)abstract
- Science-informed, reductionist policy has systematically failed to address wicked situations. Such situations are highly interconnected and unpredictable. As a consequence, the implementation of so-called desirable interventions can lead to the export of vulnerabilities within and across different societal domains, sectors, intersections and scales. Systemic practice is an emerging field, and highlights the need to enrich scientific inquiry and policy actions through action learning with an “extended peer community'' as a means to navigate wicked situations. In this paper, we report on the potential of game co-design as a systemic practice to improve the situation of Baltic Sea nutrient enrichment. Findings from water catchments in Finland, Sweden and Poland suggest that the co-design of serious games can both enhance the comprehension of wicked situations, and foster self-organized concerted action without imposing a convergence of perspectives amongst diverse stakeholders.
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