Abstract
An accurate budget of substance emissions is fundamental for protecting freshwater resources. In this context, the European Union asks all member states to report an emission inventory of substances for river basins. The river basin management system MoRE (Modeling of Regionalized Emissions) was developed as a flexible open-source instrument which is able to model pathway-specific emissions and river loads on a catchment scale. As the reporting tool for the Federal Republic of Germany, MoRE is used to model annual emissions of nutrients, heavy metals, micropollutants like polycyclic aromatic hydrocarbons (PAH), Bis(2-ethylhexyl)phthalate (DEHP), and certain pharmaceuticals. Observed loads at gauging stations are used to validate the calculated emissions. In addition to its balancing capabilities, MoRE can consider different variants of input data and quantification approaches, in order to improve the robustness of different modeling approaches and to evaluate the quality of different input data. No programming skills are required to set up and run the model. Due to its flexible modeling base, the effect of reduction measures can be assessed. Within strategic planning processes, this is relevant for the allocation of investments or the implementation of specific measures to reduce the overall pollutant emissions into surface water bodies and therefore to meet the requirements of water policy.
Highlights
Freshwater systems play the key role in substance transport to the oceans
This paper introduces MoRE as a modeling software
Since analytical units or point sources are spatial reference for modeling, all general and substance-specific input data have to be assembled on the spatial reference for modeling, all general and substance-specific input data have to be this level by means of statistical methods prior to import into the MoRE database
Summary
Freshwater systems play the key role in substance transport to the oceans. They are often intensely managed and affected by pollution. The Directive 2008/105/EC on Environmental Quality Standards of the European Parliament and the Council of the European Union asks all member states to set an inventory of emissions of priority substances for all river basin districts [1] This directive defines general requirements like management plans and measure programs according to the Water Framework Directive [2] in. Environmental management goals must be determined and member states of the European Union have to specify cost-effective measure programs for the achievement or maintenance of a good ecological state of the marine zones To fulfil these obligations and to provide both an inventory of emissions and measure programs, a useful method is the pathway-oriented modeling of emissions into water bodies on a catchment scale.
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