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Water Quality Management

Stobimo - OÖ

The 2013 review of risk assessment according to the Water Framework Directive (WFD) shows that one third of the Upper Austrian surface waters is heavily loaded with nutrients (nitrogen and phosphorus) and therefore at risk of achieving the “good status”. Because of that, this project aims at developing a management tool for an efficient reduction of nutrient emissions into the Upper Austrian rivers.

First of all, the model MONERIS has been used for the quantification of point and diffuse nutrient emissions as well as the identification of the relevant emission pathways (DateidownloadLink Report I). Secondly, the focus has been put on the selection and assessment of measures to reduce nutrient inputs into surface waters (DateidownloadLink Report II). In this process a modelling framework consisting of the models MONERIS and PhosFate has been formed. The aim of PhosFate is to identify particulate phosphorus emission hotspots within catchment areas.

Furthermore, the selected measures have been assessed regarding their cost effectiveness and their reduction potential on catchment scale. One aspect of this assessment has been the consideration of different levels of implementation (DateidownloadLink Report III).

Currently the MONERIS/PhosFate modelling framework is enhanced. MONERIS is developed towards a tool forecasting the impacts of management programs designed to achieve the “good status” according to the WFD. The development of PhosFate on the other hand is aimed at a selective identification of erosive phosphorus emission hot spots on field plot level.