… Mercury loads have decreased considerably in recent decades, as reflected for example in the suspended solids concentrations measured at the Schnackenburg/Elbe … transportation, historical mercury deposits in water body sediments, for example in still water regions, are the principal cause (see Elbe). In 2014-2016, … Mercury loads have decreased considerably in recent decades, as reflected for example in the suspended solids concentrations measured at the Schnackenburg/Elbe …

… The high levels of nutrient concentration is a reason for failing to achieve a “good ecological status”. There are changes to the natural biotic community. Total … values cannot always be standardised to the flow rate. For hydrology, for example, values over ten years are combined into long-term series. This method is …