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Publications

NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.

2024

Sammendrag

The access to marine residual resources is large in Norway, yet its use in agriculture remains limited. Circulizer project aims to improve the circularity between the blue and green sector, by increasing the knowledge of the use of marine residues (i.e. fish sludge and fish silage) for biogas production and its effects on the fertilizer quality (digestate) and environment. While the quality of digestate from food waste and animal manure has been extensively studied, the impact of incorporating increasing proportions of new marine residual resources remains to be investigated. To be able to substitute mineral fertilizer with digestate derived from marine residues, farmers require knowledge of its nutrient composition and availability. In contrast, biogas plant operators need assurance of a market for both biogas and digestate before investing in new facilities. Circulizer will run lab and field scale experiments where the biogas process performance and digestate quality will be assessed. Expected outcomes are: (i) Enhancing the green transition and circularity of Norwegian food production by recycling valuable nutrients from fish production for agricultural use; (ii) Ensuring environmental safety by addressing concerns related to heavy metals and organic pollutants; (iii) Increasing the utilization of marine residual resources for biogas production; (iv) Supporting the growth of the fish farming industry in Norway by improving waste treatment and recycling options for unavoidable residual resources, thereby facilitating increased fish production and nutrient recycling

Sammendrag

Nature-based solutions (NBS) are an increasingly popular strategy to water resources management, with a growing number of research projects and policy interventions. Development, implementation, and decision on NBS for retention of water, sediments, and nutrients in the landscape often require substantial investment in data acquisition and modeling efforts. SWAT+ provides several new approaches compared to SWAT in terms of i) enhanced catchment configuration with more spatial objects, ii) improved representation of the connectivity between man-made hydrologic systems and the catchment stream network, and iii) new algorithms to implement complex rule-based management actions. These advantages make SWAT+ very suitable for simulating catchment processes in relation to NBS and for developing catchment-based tools for optimizing the type, location, and design of NBS. To further propel the simulation and optimization of NBS at the catchment scale with SWAT+, we propose establishing a community to harmonize and synergize the efforts of SWAT+ users worldwide in the field of NBS implementation and management. The envisioned SWAT+ NBS community would comprise researchers and scientists sharing a common vision, engaged in co-developing frameworks, addressing policy imperatives, co-creating knowledge, and advocating for best practices in applying the SWAT+ model for advanced NBS optimization and management. The objectives of this presentation are 1) to discuss the phases of NBS development and management at catchment scale, 2) to identify the research gaps in using SWAT+ in NBS studies, and 3) to propose a structure and a coordination framework to shape the SWAT+ NBS community.

Sammendrag

The use of SWAT+ model is increasingly prevalent in the simulation and evaluation of Nature-Based Solutions (NBS) at the catchment scale. Compared to the SWAT model, the SWAT+ model offers several advancements, including enhanced catchment configuration, improved representation of connectivity between man-made hydrologic systems and the catchment stream network, and new algorithms for implementing rule sets for management actions. In this presentation, we outline our methodology and present some preliminary findings from implementing SWAT+ in a South-Eastern Norwegian catchment. The catchment has a relatively large proportion of agricultural land based on Norwegian standards, with several natural lakes. Our modelling results underscore the importance of the spatial configuration phase, particularly in detailed spatial settings and HRU characterization, for simulating catchment-NBS interactions. We found that integrating reanalysis of spatial meteorological data in 1x1 km resolution could significantly improve streamflow simulation. In our case study, by using Met Nordic Reanalysis Dataset from Norwegian Meteorological Institute, the NS efficiency increased from -0.05 to 0.4 prior to any calibrations. Furthermore, we discuss challenges in simulating catchment-NBS interactions with SWAT+, particularly concerning “prospective impact evaluation” in the planning phase of constructed wetlands (design, placement, and optimization).

Sammendrag

The impact of tillage-induced temporal variability of soil hydraulic properties on soil water regime was evaluated using measurements and modelling. The measurements were performed in a long-term tillage experiment representing conventional and soil-conserving tillage systems, including no-tillage. It was shown that accounting for the seasonal dynamics of soil hydraulic properties improves the SWAP soil water content simulation results.

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Sammendrag

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