Digitala Vetenskapliga Arkivet

Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Hydrodynamic and Eutrophication Modelling of Lake Vomb: Impact of Future Climate Change on Cyanobacteria
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
2022 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Hydrodynamisk och eutrofieringsmodellering av Vombsjön: Påverkan på cyanobakterier av framtida klimatförändringar (Swedish)
Abstract [en]

The increasing frequency of Cyanobacterial blooms in freshwater bodies raise concerns around the globe. The consequences of this phenomenon impact not only human health but the entire surrounding ecosystem. During the past decades, numerical modelling has been increasingly used to investigate and study aquatic systems. Hydrodynamic and Ecological models are developed in parallel to simulate processes, evaluate potential remedies, and investigate future scenarios. This project aimed at developing a 3D hydrodynamic and water quality (ecological) model to assess the eutrophication conditions of Lake Vomb under current and future scenarios. MIKE 3 FM software was used in the analysis with meteorological, hydrological, and water quality data. The hydrodynamic model performance was satisfactory in terms of water temperature simulation with root-mean-square-error (RMSE) ranging between 0.38-1.2 oC. In the ecological model, Chlorophyll-a (Chl-a) was simulated as a surrogate for Cyanobacteria. The model was adequate in simulating Chl-a concentrations with a Nash-Sutcliffe efficiency (NSE) of 0.94 during calibration and 0.84 after validation. The results showed that Lake Vomb’s nutrient concentrations are highly influenced by external nitrogen loading and internal phosphorus loading. The results also showed that Chl-a levels are correlated with the total phosphorus levels in the lake. Future water quality projections were attempted through two Representative Concentration Pathways (RCPs) for the year 2050. The projections utilized only changes in air temperatures and precipitations and suggested significant increase in Cyanobacteria biomass independence of changes in external nutrient loading.

Place, publisher, year, edition, pages
2022. , p. 54
Series
Examensarbete vid Institutionen för geovetenskaper, ISSN 1650-6553 ; 546
Keywords [en]
Hydrodynamic modelling, eutrophication, Cyanobacteria, Chlorophyll-a, climate change, MIKE 3 FM, Lake Vomb
National Category
Water Engineering
Identifiers
URN: urn:nbn:se:uu:diva-478324OAI: oai:DiVA.org:uu-478324DiVA, id: diva2:1674908
External cooperation
DiCyano
Educational program
Master's Programme in Water Engineering
Supervisors
Examiners
Available from: 2022-06-27 Created: 2022-06-22 Last updated: 2022-06-27Bibliographically approved

Open Access in DiVA

fulltext(2768 kB)159 downloads
File information
File name FULLTEXT01.pdfFile size 2768 kBChecksum SHA-512
8b6d67120cfb74bdfc6f7e7b6742708477730138c5b79f248b005c058c1121608683311704d017b0dc3f91638350c294cfcae44418e564eafb6cae00a711a904
Type fulltextMimetype application/pdf

By organisation
LUVAL
Water Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 159 downloads
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

urn-nbn

Altmetric score

urn-nbn
Total: 821 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf