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Article

NutSpaFHy—A Distributed Nutrient Balance Model to Predict Nutrient Export from Managed Boreal Headwater Catchments

1
Faculty of Science and Forestry, Joensuu Campus, School of Forest Sciences, University of Eastern Finland, PO Box 111, Yliopistokatu 7, FI-80101 Joensuu, Finland
2
Department of Civil Engineering, University of Hong Kong, Hong Kong, China
3
Natural Resources Institute Finland (Luke), Latokartanonkaari 9, FI-00790 Helsinki, Finland
4
Finnish Forest Centre, Kauppakatu 25 A, FI-87100 Kajaani, Finland
5
Department of Forest Sciences, University of Helsinki, PO Box 27, FI-00014 Helsinki, Finland
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Timothy Martin
Forests 2021, 12(6), 808; https://doi.org/10.3390/f12060808
Received: 10 May 2021 / Revised: 6 June 2021 / Accepted: 12 June 2021 / Published: 18 June 2021
(This article belongs to the Special Issue Forest Management, Hydrology and Biogeochemistry Modelling)
Responsible forest management requires accounting for adverse environmental effects, such as increased nutrient export to water courses. We constructed a spatially-distributed nutrient balance model NutSpaFHy that extends the hydrological model SpaFHy by introducing a grid-based nutrient balance sub-model and a conceptual solute transport routine to approximate total nitrogen (N) and phosphorus (P) export to streams. NutSpaFHy uses openly-available Multi-Source National Forest Inventory data, soil maps, topographic databases, location of water bodies, and meteorological variables as input, and computes nutrient processes in monthly time-steps. NutSpaFHy contains two calibrated parameters both for N and P, which were optimized against measured N and P concentrations in runoff from twelve forested catchments distributed across Finland. NutSpaFHy was independently tested against six catchments. The model produced realistic nutrient exports. For one catchment, we simulated 25 scenarios, where clear-cuts were located differently with respect to distance to water body, location on mineral or peat soil, and on sites with different fertility. Results indicate that NutSpaFHy can be used to identify current and future nutrient export hot spots, allowing comparison of logging scenarios with variable harvesting area, location and harvest techniques, and to identify acceptable scenarios that preserve the wood supply whilst maintaining acceptable level of nutrient export. View Full-Text
Keywords: nutrient loads; forest management; boreal forest; land-use; open data; hydrological modeling; environmental impacts; forest planning; water quality nutrient loads; forest management; boreal forest; land-use; open data; hydrological modeling; environmental impacts; forest planning; water quality
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MDPI and ACS Style

Lauren, A.; Guan, M.; Salmivaara, A.; Leinonen, A.; Palviainen, M.; Launiainen, S. NutSpaFHy—A Distributed Nutrient Balance Model to Predict Nutrient Export from Managed Boreal Headwater Catchments. Forests 2021, 12, 808. https://doi.org/10.3390/f12060808

AMA Style

Lauren A, Guan M, Salmivaara A, Leinonen A, Palviainen M, Launiainen S. NutSpaFHy—A Distributed Nutrient Balance Model to Predict Nutrient Export from Managed Boreal Headwater Catchments. Forests. 2021; 12(6):808. https://doi.org/10.3390/f12060808

Chicago/Turabian Style

Lauren, Annamari, Mingfu Guan, Aura Salmivaara, Antti Leinonen, Marjo Palviainen, and Samuli Launiainen. 2021. "NutSpaFHy—A Distributed Nutrient Balance Model to Predict Nutrient Export from Managed Boreal Headwater Catchments" Forests 12, no. 6: 808. https://doi.org/10.3390/f12060808

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