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Phosphorus transport in the landscape – Integrating high-frequency monitoring, phosphorus geochemistry and modelling to improve water management

Lannergård, Emma (2021). Phosphorus transport in the landscape – Integrating high-frequency monitoring, phosphorus geochemistry and modelling to improve water management. Diss. (sammanfattning/summary) Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880
ISBN 978-91-7760-845-5
eISBN 978-91-7760-846-2
[Doctoral thesis]

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Abstract

Eutrophication is one of today’s most challenging water quality issues, despite considerable efforts to reduce phosphorus (P) input to surface waters. We need to explore new tools and techniques to improve the nutrient status of our waters and facilitate the management of catchment-scale P transport. This thesis includes research on P stored in lake and streambed sediment, timing and delivery of P in the system, processes influencing this transport and predictions by water quality modelling. The results show that significant amounts of P are stored in the catchment sediments, with some streams showing comparable concentrations to lakes. Phosphorus fractions are influenced by land cover and stream order. Some fractions could be important P sources during low flows when there is a significant risk of eutrophication associated with small increases in concentration. High-frequency (HF) monitoring is an important tool to increase understanding of catchment-scale P dynamics. Especially during intermediate and high flow events, the finer temporal resolution of HF data is essential for load calculations. Also, these events showed a dominant clockwise C-Q hysteresis response that suggests fast mobilisation of particles from the streambed and riparian areas. HF data was valuable in water quality modelling to describe temporal patterns but was challenging to calibrate and evaluate with standard performance statistics. Further work is needed on efficient and transferrable methods to analyse HF data. With an improved knowledge of P stores and the use of HF data, better-informed management decisions can be made to ensure water management that reduces catchment-scale P transport.

Authors/Creators:Lannergård, Emma
Title:Phosphorus transport in the landscape – Integrating high-frequency monitoring, phosphorus geochemistry and modelling to improve water management
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :2021
Number:2021:84
Number of Pages:90
Publisher:Swedish University of Agricultural Sciences
ISBN for printed version:978-91-7760-845-5
ISBN for electronic version:978-91-7760-846-2
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Article category:Other scientific
Version:Published version
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Oceanography, Hydrology, Water Resources
Keywords:Phosphorus transport, water management, environmental assessment, phosphorus legacy, high-frequency monitoring, proxy relations, C-Q analysis, water quality modelling, INCA-PEco
URN:NBN:urn:nbn:se:slu:epsilon-p-114380
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-114380
ID Code:26171
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
Deposited By: SLUpub Connector
Deposited On:19 Nov 2021 09:26
Metadata Last Modified:19 Nov 2021 15:22

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