Søren Erik Larsen

2025

Dansk VandPlante Indeks (DVPI): udvikling, anvendelse og begrænsninger

Larsen, S. E., 10 Apr 2025, Aarhus University, DCE - Danish Centre for Environment and Energy. 25 p. (Fagligt notat fra DCE – Nationalt Center for Miljø og Energi ; No. 32, Vol. 2025).

Research output: Book/anthology/report › Report › Commissioned › peer-review

Modeling Annual Total Organic Nitrogen Concentrations in Streams Using Machine Learning at National Scale

Frederiksen, R. R., Larsen, S. E., Tornbjerg, H., Thodsen, H. & Kronvang, B., Jun 2025, In: Water Resources Research. 61, 6, e2024WR039451.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

Open Access

Sensormålinger af nitratkoncentrationer i vandløb sikrer større nøjagtighed af belastningsopgørelser til kystvande

van't Veen, S. G. M., Laugesen, J. R., Kristensen, E. A., Larsen, S. E., Ovesen, N. B., Andersen, P. M. & Kronvang, B., 6 Feb 2025.

Research output: Contribution to conference › Conference abstract for conference › Research

Stoftransportberegning: Et overblik over hyppigt anvendte metoder

Larsen, S. E., 5 Feb 2025, 13 p.. Feb 03, 2025. (Fagligt notat fra DCE – Nationalt Center for Miljø og Energi ; No. 8, Vol. 2025).

Research output: Memorandum/exposition › Memorandum › peer-review

Uncertainty in nitrate load calculations evaluated using Monte Carlo simulations based on in situ nitrate sensors in two Danish headwater streams

van't Veen, S. G. M., Larsen, S. E., Andersen, P. M., Ovesen, N. B., Laugesen, J. R. & Kronvang, B., 20 Jan 2025, (Submitted) In: Journal of Hydrology.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

2024

Aarhus Universitet: Hurtighjælp til lidende fjorde kræver mere end Grøn Trepart

Kronvang, B., Thodsen, H., Tornbjerg, H., Larsen, S. E., Ovesen, N. B., Andersen, H. E. & Blicher-Mathiesen, G., 10 Oct 2024, In: Ingeniøren.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Contribution to newspaper - Feature article

A cost-efficient method for quality assurance and quality control of high-frequency sensor data in freshwater systems - SentemQC

van't Veen, S. G. M., Kronvang, B., Audet, J., Larsen, S. E., Davidson, T. A., Jeppesen, E., Levi, E. E., Kristensen, E. A., Laugesen, J. R., Nielsen, A. & Andersen, P. M., 17 Jun 2024.

Research output: Contribution to conference › Conference abstract for conference › Research › peer-review

A novel machine learning national model for diffuse source total phosphorus concentrations in streams

Kronvang, B., Windolf, J., Rolighed, J., Tornbjerg, H. & Larsen, S. E., Aug 2024.

Research output: Contribution to conference › Conference abstract for conference › Research › peer-review

Bank erosion is as major phosphorus source in Danish catchments: how to find possible mitigation options?

Kronvang, B., Larsen, S. E., Thodsen, H., Petersen, R. J. & Andersen, H. E., Aug 2024.

Research output: Contribution to conference › Conference abstract for conference › Research › peer-review

Beskrivelse af stoftransportberegning

Thodsen, H., Erfurt, J., Tornbjerg, H., Larsen, S. E. & Conradsen, A. R., 20 Dec 2024, 19 p.. (Fagligt notat fra DCE – Nationalt Center for Miljø og Energi ; No. 77, Vol. 2024).

Research output: Memorandum/exposition › Memorandum

Open Access

Landovervågningsoplande 2022

Blicher-Mathiesen, G., Thorsen, M., Petersen, R. J., Rolighed, J., Andersen, H. E., Larsen, S. E., Grewy, P., Wienke, J., Hansen, B. & Thorling, L., 2024, Aarhus University, DCE - Danish Centre for Environment and Energy. (Videnskabelig rapport fra DCE - Nationalt Center for Miljø og Energi; No. 589, Vol. 2024).

Research output: Book/anthology/report › Report › Commissioned

Open Access

SentemQC - A novel and cost-efficient method for quality assurance and quality control of high-resolution frequency sensor data in fresh waters

van't Veen, S. G. M., Kronvang, B., Audet, J., Davidson, T. A., Jeppesen, E., Kristensen, E. A., Larsen, S. E., Laugesen, J. R., Levi, E. E., Nielsen, A. & Andersen, P. M., 7 Nov 2024, In: Open Research Europe. 4, 244, 28 p., 244.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

Open Access

1 Citation (Scopus)

Translated title of the contribution: SentemQC: Python code and test dataset for SentemQCAndersen, P. M. (Producer), van't Veen, S. G. M. (Producer), Frederiksen, R. R. (Producer), Kronvang, B. (Producer), Audet, J. (Producer), Davidson, T. A. (Producer), Jeppesen, E. (Producer), Larsen, S. E. (Producer), Levi, E. E. (Producer), Kristensen, E. A. (Producer), Laugesen, J. R. (Producer) & Nielsen, A. (Producer), 25 Oct 2024

Research output: Non-textual form › Software

Uddybning af forskelle i opgjorte tilførsler af kvælstof og ferskvand imellem VP3 og VP3-Genbesøg: Vurdering af udviklingstendenser for vandafstrømning og diffuse kvælstoftilførsler fra henholdsvis målt og umålt opland i 14 farvandsområder

Larsen, S. E., 17 Dec 2024, Aarhus University, DCE - Danish Centre for Environment and Energy. 29 p. (Fagligt notat fra DCE – Nationalt Center for Miljø og Energi ; No. 72, Vol. 2024).

Research output: Book/anthology/report › Report › Commissioned

Open Access

Vandløb 2022: NOVANA

Thodsen, H., Kjær, C., Tornbjerg, H., Rolighed, J., Larsen, S. E. & Blicher-Mathiesen, G., 27 Feb 2024, Aarhus University, DCE - Danish Centre for Environment and Energy. 83 p. (Videnskabelig rapport fra DCE - Nationalt Center for Miljø og Energi; No. 590, Vol. 2024).

Research output: Book/anthology/report › Report › Commissioned

Open Access

Vandløbsøkologi 2023: NOVANA - Bentiske kiselalger

Pacheco, J. P. & Larsen, S. E., Nov 2024, Aarhus University, DCE - Danish Centre for Environment and Energy. 47 p. (Videnskabelig rapport fra DCE - Nationalt Center for Miljø og Energi; No. 630, Vol. 2024).

Research output: Book/anthology/report › Report › Commissioned

Open Access

Vand- og Stoftransport 2023

Thodsen, H., Tornbjerg, H., Larsen, S. E., Conradsen, A. R., Muff, E. & Blicher-Mathiesen, G., 9 Dec 2024, Aarhus University, DCE - Danish Centre for Environment and Energy. 71 p. (Videnskabelig rapport fra DCE - Nationalt Center for Miljø og Energi, Vol. 629).

Research output: Book/anthology/report › Report › Commissioned

Open Access

2023

Alkalinity and its influence on benthic diatom assessments in Danish running waters

Pacheco Esnal, J. P., Larsen, S. E. & Baattrup-Pedersen, A., Feb 2023, Aarhus University, DCE - Danish Centre for Environment and Energy. 30 p. (Scientific Report from DCE - Danish Centre for Environment and Energy; No. 521).

Research output: Book/anthology/report › Report › Commissioned › peer-review

Open Access

A novel machine learning national model for diffuse source total phosphorus concentrations in streams

Kronvang, B., Windolf, J., Tornbjerg, H., Rolighed, J. & Larsen, S. E., 2023.

Research output: Contribution to conference › Conference abstract for conference › Research › peer-review

Open Access

Bank erosion is as major phosphorus source in Danish catchments: how to find possible mitigation options?

Kronvang, B., Kjeldgaard, A., Larsen, S. E., Thodsen, H. & Andersen, H. E., 7 Nov 2023.

Research output: Contribution to conference › Conference abstract for conference › Research › peer-review

Benthic diatom index for water quality biomonitoring of Danish running waters

Pacheco, J. P., Larsen, S. E. & Baattrup-Pedersen, A., 11 Sept 2023.

Research output: Contribution to conference › Conference abstract for conference › Research › peer-review

Development and application of a parsimonious statistical model to predict tile flow in minerogenic soils

Frederiksen, R. R., Larsen, S. E., Blicher-Mathiesen, G. & Kronvang, B., May 2023, In: Agricultural Water Management. 281, 108244.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

Open Access

3 Citations (Scopus)

Root development is faster in common species of Potamogeton compared to declining species of Potamogeton in Danish lowland streams

Henriksen, L. D. R., Larsen, M. B., Johnsen, T. J., Larsen, S. E., Riis, T. & Baattrup-Pedersen, A., Nov 2023, In: Aquatic Botany. 189, 7 p., 103702.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

Open Access

File

13 Downloads (Pure)

Use of high spatial resolution nitrogen attenuation mapping in groundwater and surface waters for planning how to reach nitrogen reduction goals in 3rd River Basin Management Plans: Hjarbæk coastal catchment, Denmark

Windolf, J., Tornbjerg, H., Larsen, S. E. & Kronvang, B., 2023.

Research output: Contribution to conference › Conference abstract for conference › Research › peer-review

Open Access

Vandløb 2021: Kemisk vandkvalitet, stoftransport og miljøfarlige forurenende stoffer. NOVANA

Thodsen, H., Tornbjerg, H., Rolighed, J., Kjær, C., Larsen, S. E., Ovesen, N. B. & Blicher-Mathiesen, G., 2023, Århus Universitet. 90 p. (Videnskabelig rapport fra DCE - Nationalt Center for Miljø og Energi; No. 527).

Research output: Book/anthology/report › Report › Commissioned › peer-review

Open Access

Vandmiljø og Natur 2023 NOVANA: Tilstand og udvikling - faglig sammenfatning.

Hansen, A. S., Fredshavn, J. R., Uldal, C., Bjergager, M.-B. A., Bach, H., Nielsen, V. V., Kongsfelt, I. B., Svendsen, L. M., Blicher-Mathiesen, G., Thodsen, H., Hansen, J. W., Johansson, L. S., Pacheco, J. P., Larsen, S. E., Nielsen, R. D., Ellermann, T., Nordstrøm, C., Lassen, P., Thorling, L. & Frank-Gopolos, T., Dec 2023, Aarhus University, DCE - Danish Centre for Environment and Energy. 88 p. (Videnskabelig rapport fra DCE - Nationalt Center for Miljø og Energi; No. 635).

Research output: Book/anthology/report › Report › Commissioned

Open Access

2022

Alkalinity and diatom assemblages in lowland streams: How to separate alkalinity from inorganic phosphorus in ecological assessments?

Baattrup-Pedersen, A., Johnsen, T. J., Larsen, S. E. & Riis, T., 1 Jun 2022, In: Science of the Total Environment. 823, 153829.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

Open Access

File

15 Citations (Scopus)

112 Downloads (Pure)

An empirical model for tile flow fraction in systematically tile-drained minerogenic soils

Frederiksen, R. R., Larsen, S. E., Blicher-Mathiesen, G. & Kronvang, B., 2022.

Research output: Contribution to conference › Conference abstract for conference › Research › peer-review

A novel machine learning national model for diffuse source total phosphorus concentrations in streams

Kronvang, B., Larsen, S. E., Windolf, J., Tornbjerg, H. & Rolighed, J., 2022.

Research output: Contribution to conference › Conference abstract for conference › Research › peer-review

Effect of extreme climate events on responses of nitrogen leaching and concentrations in agricultural catchments in Denmark

Blicher-Mathiesen, G., Hansen, B., Tornbjerg, H., Thodsen, H., Larsen, S. E. & Kronvang, B., Oct 2022.

Research output: Contribution to conference › Conference abstract for conference › Research › peer-review

Open Access

Evaluation of the 2017 progress towards updated Nutrient Input Ceilings

Svendsen, L. M., Larsen, S. E. & Gustafsson, B. G., Sept 2022, Helsinki Commission - HELCOM. 37 p.

Research output: Book/anthology/report › Report › Commissioned

Open Access

HELCOM Guidelines for the annual and periodical compilation and reporting of waterborne pollution inputs to the Baltic Sea (PLC-Water)

Svendsen, L. M., Boutrup, S., Larsen, S. E., Frank-Kamenetsky, D., Gauss, M., Gustafsson, B. G., Haapaniemi, J., Hansson, K., Kokorite, I., Mönnich, J., Oblomkova, N., Pohl, M., Raike, A., Sokolov, A., Sonesten, L. & Tornbjerg, H., Apr 2022, Helsinki Commission - HELCOM. 173 p.

Research output: Book/anthology/report › Report › Commissioned

Open Access

File

52 Downloads (Pure)

Ny fosformodel til estimering af årlig vandføringsvægtet koncentration af total fosfor fra diffuse kilder i ID15-oplande

Larsen, S. E., Kjeldgaard, A., Windolf, J., Tornbjerg, H. & Kronvang, B., 2022, Aarhus University, DCE - Danish Centre for Environment and Energy. 80 p. (Teknisk rapport fra DCE - Nationalt Center for Miljø og Energi; No. 246, Vol. 2022).

Research output: Book/anthology/report › Report › Commissioned › peer-review

Open Access

Pitfalls and new solutions in water quantity and quality monitoring

Kronvang, B., Windolf, J., van't Veen, S. G. M., Ovesen, N. B., Tornbjerg, H., Thodsen, H., Blicher-Mathiesen, G. & Larsen, S. E., Oct 2022.

Research output: Contribution to conference › Conference abstract for conference › Research › peer-review

Open Access

Rare Potamogeton species can establish in restored Danish lowland stream reaches

Johnsen, T. J., Henriksen, L. D. R., Larsen, M. B., Kallestrup, H., Larsen, S. E., Riis, T. & Baattrup-Pedersen, A., Mar 2022, In: Freshwater Biology. 67, 3, p. 518-532 15 p.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

2 Citations (Scopus)

Udvikling af en korrektionsformel for kvælstofkoncentrationer analyseret i naturvandløb i perioden 2009-2015

Larsen, S. E., Tornbjerg, H. & Kronvang, B., Oct 2022, 18 p.. (Fagligt notat fra DCE – Nationalt Center for Miljø og Energi ; No. 64, Vol. 2022).

Research output: Memorandum/exposition › Memorandum

Open Access

2021

Analyse af organisk kvælstof koncentrationer i vandløb i to perioder med henblik på at udvikle en korrektionsformel for perioden 2009-2014

Larsen, S. E., Tornbjerg, H., Thodsen, H., Kronvang, B. & Blicher-Mathiesen, G., 25 May 2021, 116 p.. (Fagligt notat fra DCE – Nationalt Center for Miljø og Energi ; No. 29).

Research output: Memorandum/exposition › Memorandum › peer-review

Open Access

Analyse af organisk kvælstof koncentrationer i vandløb med henblik på at udvikle en korrektionsformel for 2015

Larsen, S. E., Tornbjerg, H., Thodsen, H., Kronvang, B. & Blicher-Mathiesen, G., May 2021, 19 p.. (Fagligt notat fra DCE – Nationalt Center for Miljø og Energi ; No. 39).

Research output: Memorandum/exposition › Memorandum › peer-review

Open Access

Applied methodology for the PLC-7 assessment

Svendsen, L. M., Tornbjerg, H. & Larsen, S. E., 1 Dec 2021, Helsinki Commission - HELCOM. 82 p.

Research output: Book/anthology/report › Report › Commissioned

Open Access

File

63 Downloads (Pure)

Effects of different weed cutting methods on physical and hydromorphological conditions in lowland streams

Rasmussen, J. J., Kallestrup, H., Thiemer, K., Alnøe, A. B., Henriksen, L. D., Larsen, S. E. & Baattrup-Pedersen, A., Mar 2021, In: Knowledge and Management of Aquatic Ecosystems. 2021, 422, 10.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

Open Access

10 Citations (Scopus)

Evidensbaseret og omkostningseffektiv grødeskæring i små danske vandløb: dataopsummering 2020

Johnsen, T. J., Baattrup-Pedersen, A. & Larsen, S. E. (Member of author collaboration), 2021, Aarhus. 40 p. (Teknisk rapport fra DCE - Nationalt Center for Miljø og Energi; No. 209).

Research output: Book/anthology/report › Report › Communication

Hyppige vandaksarter etablerer sig hurtigere end sjældne vandaksarter

Larsen, M. B., Henriksen, L. D. (Member of author collaboration), Johnsen, T. J. (Member of author collaboration), Larsen, S. E. (Member of author collaboration), Riis, T. (Member of author collaboration) & Baattrup-Pedersen, A. (Member of author collaboration), May 2021, In: Vand & Jord. 28. årgang, 2, p. 48-51 4 p.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Communication

Input of nutrients by the seven biggest rivers in the Baltic Sea region 1995-2017

Svendsen, L. M., Haapaniemi, J., Larsen, S. E., Oblomkova, N., Frank-Kamenetsky, D., Bojanowski, D., Brynska, W., Ennet, P., Gustafsson, B. G., Koch, D., Kokorite, I., Mönnich, J., Plunge, S., Pohl, M. & Sonesten, L., 10 Jan 2021, Helsinki Commission - HELCOM. 24 p. (Baltic Sea Environment Proceedings; No. 178).

Research output: Book/anthology/report › Report › Commissioned

Open Access

File

250 Downloads (Pure)

Korrektion af totalkvælstofanalyser foretaget på søprøver i perioden 2007-2017

Tornbjerg, H., Søndergaard, M., Johansson, L. S. & Larsen, S. E., 2021, 13 p.. (Fagligt notat fra DCE – Nationalt Center for Miljø og Energi ; No. 62).

Research output: Memorandum/exposition › Memorandum › peer-review

Nutrient loading, temperature and heat wave effects on nutrients, oxygen and metabolism in shallow lake mesocosms pre-adapted for 11 years

Jeppesen, E., Audet, J., Davidson, T. A., Neif, É. M., Cao, Y., Filiz, N., Lauridsen, T. L., Larsen, S. E., Beklioğlu, M., Sh, T. & Søndergaard, M., Jan 2021, In: Water (Switzerland). 13, 2, 127.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

Open Access

20 Citations (Scopus)

Statistical aspects in relation to Baltic Sea Pollution Load Compilation: Task under HELCOM PLC-8 project

Larsen, S. E. & Svendsen, L. M., 8 Dec 2021, Aarhus University, DCE - Danish Centre for Environment and Energy. 60 p. (Technical Report from DCE - Danish Centre for Environment and Energy; No. 224, Vol. 2021).

Research output: Book/anthology/report › Report › Commissioned › peer-review

Open Access

File

25 Downloads (Pure)

Vandløb 2019: Kemisk vandkvalitet og stoftransport

Thodsen, H., Tornbjerg, H., Bøgestrand, J., Larsen, S. E., Ovesen, N. B., Blicher-Mathiesen, G., Holm, H., Rolighed, J. & Kjeldgaard, A., Jul 2021, Aarhus University, DCE - Danish Centre for Environment and Energy. 78 p. (Videnskabelig rapport fra DCE - Nationalt Center for Miljø og Energi; No. 452).

Research output: Book/anthology/report › Report › Commissioned › peer-review

Open Access

Vandløb 2020: NOVANA

Thodsen, H., Tornbjerg, H., Rolighed, J., Baattrup-Pedersen, A., Larsen, S. E., Ovesen, N. B., Blicher-Mathiesen, G. & Kjeldgaard, A., 17 Dec 2021, Aarhus University, DCE - Danish Centre for Environment and Energy. 82 p. (Videnskabelig rapport fra DCE - Nationalt Center for Miljø og Energi; No. 473).

Research output: Book/anthology/report › Report › Commissioned

Open Access

2020

Catchment-scale analysis reveals high cost-effectiveness of wetland buffer zones as a remedy to non-point nutrient pollution in north-eastern Poland

Jabłońska, E., Wiśniewska, M., Marcinkowski, P., Grygoruk, M., Walton, C. R., Zak, D., Hoffmann, C. C., Larsen, S. E., Trepel, M. & Kotowski, W., Mar 2020, In: Water (Switzerland). 12, 3, 21 p., 629.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

Open Access

34 Citations (Scopus)

Effects of low flow and co-occurring stressors on structural and functional characteristics of the benthic biofilm in small streams

Baattrup-Pedersen, A., Graeber, D., Kallestrup, H., Guo, K., Rasmussen, J. J., Larsen, S. E. & Riis, T., Sept 2020, In: Science of the Total Environment. 733, p. 139331 10 p., 139331.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

12 Citations (Scopus)

Søren Erik Larsen

Research output

Search results