Anastasija Isidorova
Research Scientist
(+47) 461 18 267
anastasija.isidorova@nibio.no
Place
Ås O43
Visiting address
Oluf Thesens vei 43, 1433 Ås
Abstract
Rapporten gir en oversikt over resultater fra overvåking av bekker, elver og innsjøer i Vannområde Morsa i perioden 1. november 2024 – 31. oktober 2025. Resultatene inkluderer oversikt over konsentrasjoner av næringsstoffer og suspendert sediment, samt tarmbakterier i elver og bekker, og klorofyll og algetellinger i innsjøer.
Authors
Anastasija Isidorova Sigrun Hjalmarsdottir Kværnø Franziska Fischer Stein Turtumøygard Frank Miller Marianne Bechmann Anja Celine WingerAbstract
No abstract has been registered
Abstract
Fertilizers and pesticides contribute to the pollution of water resources. The areas along streams are affected by climate change as stream bank failures often occur following floods or during prolonged rainfalls. In addition to BMP (best management practices) on the fields, grassed cover buffer zones are one of the most common measures for improving water quality in Norway’s agricultural catchments. Increased focus on buffer zones is important in a future climate perspective, both for food production, natural diversity and water quality. The efficiency of vegetation cover is composed of a variety of factors; therefore, effectives of these measures are to a large degree site specific. Recently, increased attention is given to the buffer zones efficiency, depending on both conditions in the catchments and the design of the buffer zones itself. However, most research is focusing in investigating the effect of buffer zones looking mostly at the surface runoff. According to our knowledge there is no previous research investigating the efficiency of the buffer zones with flower mixture. We focus on these types of vegetation as they also stimulate increased biodiversity. Moreover, previous investigations show that more than 50% of simulated runoff infiltrates into buffer zones with grass and bushes, while within buffer zones with trees there all the water infiltrates into the soil. Herein we show the results of 3 years monitoring surface runoff from buffer zones with different types of plant cover (grass and flower mixture). The idea was to monitor real live surface runoff from the field with autumn tillage (as “worst case scenario”). The results show significant differences, especially in the runoff quality. The visual differences are confirmed by water quality analysis.