Sigrun Hjalmarsdottir Kværnø

Research Scientist

NIBIO Publications

NIBIO Projects

Division of Environment and Natural Resources

Soil and Land Use

(+47) 918 89 028
sigrun.kvaerno@nibio.no

Place
Ås O43

Visiting address
Oluf Thesens vei 43, 1433 Ås

My NIBIO publications

Report – AGRITIL - Nutrient loss model for agriculture - Modelling soil, organic carbon, nitrogen and phosphorus losses from Norwegian agricultural areas to water

Sigrun Hjalmarsdottir Kværnø, Franziska Fischer, Marianne Bechmann

NIBIO Rapport, 10(43) 2024. 76 p.

To document

Authors

Sigrun Hjalmarsdottir Kværnø Franziska Fischer Marianne Bechmann

Abstract

This report describes the development of models to calculate losses of soil particles, phosphorus, nitrogen and organic carbon from agricultural land to first order streams. The results from the models serve as input data to the TEOTIL model which estimates the net losses from agriculture and all other sources. The agricultural models (AGRITIL) were calibrated for catchments in the Agricultural Environmental monitoring programme and are limited by the availability of data for different regions in Norway.

Lecture – Estimation of annual nitrogen losses by runoff based on long-term catchment monitoring data in Norway

Franziska Fischer, Marianne Bechmann, Hans Olav Eggestad, ...

Catchment Science Conference, 07.11.2023 - 09.11.2023

Authors

Franziska Fischer Marianne Bechmann Hans Olav Eggestad Sigrun Hjalmarsdottir Kværnø Jian Liu

Abstract

No abstract has been registered

Lecture – Towards better targeting of conservation measures for reducing phosphorus losses from agricultural land to water in Norway and Sweden

Jian Liu, Faruk Djodjic, Barbro Ulen, ...

Catchment Science Conference, 07.11.2023 - 09.11.2023

Authors

Jian Liu Faruk Djodjic Barbro Ulen Helena Aronsson Robert Barneveld Marianne Bechmann Lars Bergström Tore Krogstad Sigrun Hjalmarsdottir Kværnø Katarina Kyllmar Anne Falk Øgaard Lillian Øygarden Eva Skarbøvik

Abstract

No abstract has been registered

Expand my NIBIO publications

Division of Environment and Natural Resources

Mitigation measures for phosphorus and nitrogen under changing climate: conflicts and synergies

Nutrient concentrations, loads and stoichiometry (i.e., N:P ratio) in agricultural runoff affect the quality of surface waters. In Norway, the reduction of nutrient runoff is challenged by the sloped landscape, variable weather and changing climate with an increasing number of extreme hydrological events. Mitigation measures for reducing nutrient losses are pressingly needed but they do not always work simultaneously or equally for both N and P, due to the differences in their agronomic and biogeochemical characteristics and dominant transport pathways.

My finished projects

Address	Postboks 115 NO-1431 Ås
Phone	+47 406 04 100
E-mail	post@nibio.no