Lillian Øygarden
Head of Research
(+47) 916 84 113
lillian.oygarden@nibio.no
Place
Ås O43
Visiting address
Oluf Thesens vei 43, 1433 Ås
Attachments
CV-Oygarden short May2021Biography
Short overview working experience:
- Research and monitoring of agriculture and environmental effects
- Soil erosion and hydrology in agricultural catchments, effect of measures
- Production systems- agronomic methods for increased food production
- Soil and water conservation
- Measures to reduce greenhouse gas emissions
- Climate change and adaptation measures
- Contact NIBIO Climate Forum
Abstract
Excessive phosphorus and nitrogen losses from agricultural areas cause eutrophication, one of the most prevalent global water quality challenges. This study's main goal was to identify and evaluate the occurrence of diffuse pollution attributed to extreme hydrologic events from agriculturally dominated areas. We analyzed the Norwegian Agricultural Environmental Monitoring Program long-term data from four catchments representing different agricultural practices and climate regimes. Extreme flows were set at ≥10% exceedance (Q10) flows and the corresponding nutrient and sediment losses were evaluated. The extreme flow occurrences between the catchments were significantly different, especially in spring and autumn months. In southeastern Norway (cereal crops; distinct winter freeze and thaw), at least 70% of the total suspended sediments (TSS) and total phosphorus (Ptot) losses were attributed to extreme flows. Forty percent of the TSS and nutrient losses were attributed to extreme flows in the grassland-dominated in western Norway (coastal climate, high annual total precipitation). In southern Norway (vegetables, coastal climate), TSS and Ptot losses were largely attributed to extreme events but only 30% of the dissolved phosphorus and 40% of the total nitrogen losses. The occurrence of diffuse pollution due to extreme events varied significantly between agricultural practices and climate regimes. We recommend that the effectiveness and efficiency of conservation measures against extreme hydrologic events in relation to agricultural practices and prevailing climate conditions should be accounted for in planning and implementation.
Abstract
Rapporten gir en oversikt over klimarisiko for noen jordbruksproduksjoner i Trøndelag. Basert på forventede endringer i klima er det vurdert både muligheter og utfordringer for korn, grovfôr og grønnsaksproduksjon i Trøndelag. I klimatilpasning er det vektlagt kunnskap om lokalt jordsmonn for tilpasning av drenering, maskiner og jordarbeiding, tilpasning av vekster og agronomisk praksis. This report gives a short overview of climate risk for certain agricultural productions in Trøndelag. Based on expected changes in climate both opportunities and challenges are included for cereal, fodder and vegetable productions. Knowledge about soil and soil quality for adaptation of drainage, soil tillage, machinery and choice of crops and agronomic practice is emphasized.
Lecture – Aktuelle tiltak for klimatilpasning i landbruket
Lillian Øygarden, Sigridur Dalmannsdottir
Abstract
No abstract has been registered
